REPORT FOR CONSULTATION ON THE METROPOLITAN CHARLOTTE INTERSTATE AIR QUALITY CONTROL REGION (NORTH CAROLINA AND SOUTH CAROLINA) U. S." DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE PUBLIC HEALTH SERVICE ------- REPORT FOR CONSULTATION ON THE METROPOLITAN CHARLOTTE INTERSTATE AIR QUALITY CONTROL REGION (NORTH CAROLINA AND SOUTH CAROLINA) U. S. DEPARTMENT OF HEALTH, EDUCATION, AND WELFARE Public Health Service National Air Pollution Control Administration May 1970 ------- CONTENTS Preface. . . . . . . . . . . . . Introduction . . . . . . . . . . . . . Evaluation of Urban Factors . . . . . .. . . . Geography of the Region . . . . . Present Distribution of Population and Urbanization Trends . ~ . . . . . . . . Prospective Population and Economic Growth. . . . . . . . . . . . . . . Probable Directions of Urban Growth . . . . . Evaluation of Technical Factors. . . . . . . The Emission Inventory. . . . . . . . . Air Quality Analysis. . . . . . . . . . Regional Governmental Organization . . . . . . . . Proposed Air Quality Control Region. . . . . i ii 1 1 7 22 27 30 30 38 46 53 ------- PREFACE The Clean Air Act, as amended, directs the Secretary of Health, Education, and Welfare to designate "air quality control regions" to provide a basis for the adoption of regional air quality standards and the implementation of those standards. The Act stipulates that the designation of a region shall be preceded by consultation with appropriate State and local authorities. This report is intended to provide the basic back- ground information needed for the consultation. It proposes boundaries for the Metropolitan Charlotte Interstate Air Quality Control Region and discusses the factors which are the basis of the proposed boundaries. The Region* boundaries proposed in this report remain subject to revisions suggested during consultation with State and local authorities. Formal designation of the Region will be made only after a careful review of all opinions and sugges- tions submitted during the consultation process. The National Air Pollution Control Administration appre- ciates assistance received from the States of North Carolina and South Carolina, and the local governments and planning agencies in the area. *For the purposes of this report, the word "region," when capitalized, will refer to the Metropolitan Charlotte Inter~ state Air Quality Control Region. -i- ------- INTRODUCTION THE REGIONAL APPROACH Air pollution in the urban areas of the United States is a regional problem which frequently extends across governmental boundaries. Since air pollution problems are rarely confined to any single municipality or county, and are often not confined within a single State, successful control requires coordinated planning, standard setting, and enforcement by the several political jurisdictions which-share a common problem. To date, State and local governments across the Nation have only begun to develop a regional approach to air pollution control. The Clean Air Act, as amended, provides a regional approach which depends upon coordination and cooperation among all levels of government--municipal, county, State, and Federal. To set in motion the machinery for regional air pollution control, the Department of Health, Education, and Welfare designates air quality control regions (following consultation with State and local officials), issues air quality criteria, and publishes reports on control techniques. The designation of region bound- aries indicates which State and local jurisdictions will be involved in a regional air pollution control effort. The air quality criteria indicate the extent to which various concentra- tions of air pollutants are harmful to health and damaging to -11- ------- property. The reports on control techniques provide information on the costs and effectiveness of various techniques for con- trolling air pollutant emissions. After the Department of Healtht Educationt and Welfare com- pletes these initial stepst State governments develop air quality standards and plans for implementation of such standards within the boundaries of designated air quality control regions. An air quality standard for a region defines the desired limit of concentration of a pollutant in the ambient air. It represents the level of air quality which the regional control program will attempt to achieve. An implementation plan is a blueprint of the steps which will be taken to attain chosen regional air quality standards within a reasonable time. The Clean Air Act requires that within 90 days after the Secretary of Healtht Educationt and Welfare has designated the region, State Governors must submit letters indicating that they intend to set air quality standards for those pollutants for which criteria and control technology documents have been issued. They have an additional 180 days to set the standards. The procedure for setting s~andards includes a public hearing which allows residents of a region to express their views concerning the proposed standards. The Governors are required to submit to the SecretarYt within an additional 180 dayst plans for the implementation of the standards which have been adopted. -iii- ------- The Department of Health, Education, and Welfare reviews air quality standards and implementation plans in order to ascertain . . their consistency with the provisions of the Act. When air quality standards and implementation plans are approved, States proceed to prevent and control air pollution in accordance with those standards and plans. This system for estab- lishing a regional approach to air pollution control is outlined in Figure 1. DESIGNATION OF AIR QUALITY CONTROL REGIONS Designation of an air quality control region is one of the first steps in the regional approach to air pollution control. Section 107 (a) (2) of the Clean Air Act, as amended, directs the Secretary, Department of Health, Education, and Welfare to nlake such designations. The portions of the section relevant to this discussion state: "...The Secretary, after consultation with appropriate State and local authorities shall...designate air quality control regions based on jurisdictional boundaries, urban-industrial concentrations, and other factors including atmospheric areas necessary to provide adequate implementation of air quality standards. The Secretary may...revise the designation of such regions...The Sec- retary shall immediately notify the Governor or Governors of the affected State or States of such designation." Procedure for Designation of Regions Figure 2 illustrates the procedures used by the National Air Pollution Control Administration (NAPCA) for designating air quality -iv- ------- >%j H c;') C ~ t"%J f-' I o >%j :;j f-' o II) ( ~ t:J CD to'- II) I-'- 0 ti :;j ~ II) f-' H> tP 0 II) ti en ..... > en n v rt ..... CO :;j :;j 0. I CD rt < ti 0 I rt (') ::TO CD :;j rt nti f-'O CD f-' II) :;j > to'- >ti to'- ti "'d o >f-' n f-' rt c: rt ..... o ::3 HEW DESIGNATES AI R QUALITY CONTROL REGIONS. HEW DEVELOPS AND PUBLISHES AI R QUALITY CRITERIA BASED ON SCIENTIFIC EVIDENCE OF AIR POLLUTION EFFECTS. HEW PREPARES AND PUBLISHES REPORTS ON AVAILABLE CONTROL TECHNIQUES STATES INDICATE THEIR INTENT TO SET STANDARDS. (pUBLIC HEARINGS) STATES SET AI R QUALITY STANDARDS FOR THE AIR QUALITY CONTROL REGIONS. STATES SUBMIT STANDARDS FOR HEW REVIEW. STATES ESTABLISH COMPREHENSIVE PLANS . '. FOR IMPLEMENTING AI R QUALITY STANDARDS. STATES SUBMIT IMPLEMENTATION PLANS FOR HEW REVIEW. STATES ACT'tO CONTROL AIR POllUTION IN ACCORDANCE WITH AIR QUALITY STANDARDS AND PLANS FOR IMPLEMENTATION. ------- I <: ..... I "<:I H c;') c::: ::d t%j N ENGINEERING EVALUATION . EMISSIONS INVENTORY '" . TOPOGRAPHY . METEOROLOGY . AIR QUALITY ANALYSIS EXISTING AIR QUALITY DATA DIFFUSION MODEL OUTPUT ~ PRELIMINARY CONSULTATION FORMAL DELINEATION ~ WITH STATE AND ... DESIGNATION BY ..... OF REGIONS ..... LOCAL OFFICIALS SECRETARY-HEW URBAN FACTORS EVALUATION ~ . . JURISDICTIONAL BOUNDARIES . URBAN-INDUSTRIAL CONCENTRATIONS -. . COOPERATIVE REGIONAL ARRANGEMENTS . PATTERNS AND RATES OF GROWTH . EXISTING STATE AND LOCAL AIR POLLUTION CONTROL PROGRAMS & LEGISLATION ------- control regions. After evaluating relevant technical and urban factors in a region, the National Air Pollution Control Administration pub- lishes a proposed delineation of the boundaries. At the same time, NAPeA sets a time and place for a consultation meeting and distributes to State and local authorities a report of the evalua- tion study (such as this "Report for Consultation") which includes the boundary proposal. At the consultation meeting State and local authorities are encouraged to present fully their views and suggestions concerning the proposed boundaries of the region. Interested parties who do not have official status may submit comments in written form for the record. After careful review of all suggestions and opinions submitted for the record by interested parties, the Secretary of Health, Education, and Welfare makes a formal designation of the region boundaries and notifies the Governor(s) of the State(s) affected by the designation. The Size of a Region As stipulated in Section 107 (a) (2), the designation of air quality control regions should be based on "jurisdictional boundaries, urban-industrial concentrations and other factors including atmospheric areas necessary to provide adequate implementation of air quality standards." This language suggests a number of :objectives which are important in determining how -vii- ------- large an air quality control region should be. Basically, I these objectives can be divided into three separate categories. . First, a region should be self-contained with respect to air pollution sources and receptors. Unfortunately, since air pollutants can travel long distances, it is impractical if not impossible to delineate regions which are completely self- contained. The air over a over a region will usually have at least trace amounts of pollutants from external sources. During episodic conditions, such contributions from external sources may even reach significant levels. Conversely, air pollution generated within a region and transported out of it ~an affect external receptors to some degree. It would be impractical and inefficient to make all air quality control regions large enough to encompass these low-level trace effects. The geo- graphic extent of trace effects overestimates the true problem area which should be the focus of air pollution control efforts. Thus, the first objective, that a region be self-contained, becomes a question of relative magnitude and fr~quency. The dividing line between "important influence" and "trace effect" will be a matter of judgment. The judgment should be based on estimates of the impact a source has upon a region, and the level of pollution to which receptors are subjected. In this respect, annual and seasonal data on pollutant emissions and ambient air concentrations are a better measure of relative -viii - ------- influence than short term data on episodic conditions. In summary, a region should include most of the important sources in the area as well as most of the people and property affected by those sources. The second general objective requires that regional bound- aries be designed to meet not only present conditions but also future conditions. In other words, the region should include areas where industrial and residential expansion are likely to create air pollution problems in the foreseeable future. This objective requires careful consideration of existing metropolitan development plans, expected population growth, and projected industrial expansion. Such considerations should result in the designation of regions which will contain the sources and recep- tors of regional air pollution for a number of years to come. Of course, regional boundaries need not be permanently fixed, once designated. Boundaries should be reviewed periodically and altered when changing conditions war~ant readjustment. The third objective is that regional boundaries should be compatible with and even foster unified and cooperative govern- mental administration of the air resource throughout the region. Because air pollution usually extends across governmental bound- aries, the cooperation of several governmental bodies is required for the solution of a common set of air pollution problems. In this regard, the established patterns of governmental coopera- -ix- ------- tion on a range of urban problems is an important consideration, and the pattern of cooperation among existing air pollution con- trol programs is a particularly relevant factor. In general, administrative considerations would argue against the division of governmental jurisdictions. Although it would be impractical to preserve State jurisdictions undivided, usually it is possible to preserve the unity of county governments by including or excluding them in their entirety. Occasionally, even this would be impractical due to a county's large size, wide variation in level of development, or striking topographical features. To the extent that any two of the above three objectives lead to incompatible conclusions concerning reg~on boundaries, the region must represent a reasonable compromise. A region should represent the best way of satisfying the three objectives simultaneously. As noted above, the evaluations of relevant technical, urban, and governmental factors form the basis of the boundary proposals published by NAPCA. The technical factors study takes account of the location of pollution sources and the geographic extent of serious pollutant concentrations in the ambient air. Pollution sources are identified through an inventory of emissions from power generation, industrial operations, space heating, waste disposal, and other pollution-causing activities. The transport and distribution of pollutants in the ambient air are -x- ------- analyzed on the basis of measured air quality data, the location of emissions, meteorological data, and topographic information. A mathematical diffusion model which predicts a~bient pollution concentrations from information on emissions and meteorology can be used in areas where ~rregular topographical features would not invalidate the theoretical model. As a whole, the technical factors study indicates how large the air quality control region should be in order to encompass most pollution sources and most people and property affected by those sources. The study of urban factors takes account of a different set of considerations. It discusses the location of urban and industrial concentrations and expected patterns of urban growth. As a whole, the urban factors study indicates how large a region should be in order to encompass expected regional growth. The evaluation of the regional governmental organizations discusses the planning agencies, councils of government, and state and local air pollution control programs. This study attempts to define the combination of counties which, through cooperative regional arrangements, would best work together towards achieving clean air in the region. The body of this report contains a proposal for the boundaries of the Metropolitan Charlotte Interstate Air Quality Control Region, based on the evaluation of technical~ urban, and governmental factors. The report is intended to serve as the -xi- ------- background document for the Consultation between the National Air Pollution Control Administration and the appropriate State and. local authorities. -xii- ------- EVALUATION OF URBAN FACTORS Factors of major importance in considering boundaries for an air quality control region are those which have to do with the size, shape, nature, and dynamics of urbanization within the region. It is the concentration of population and work in urban centers that creates many sources of air pollution and exposes large numbers of people and valuable property to their effects. This discussion will review the geography of the Metropolitan Charlotte area since physical characteristics can affect both the scale and direction of urban growth. The present pattern of population and economic activity will be considered, as well as the probable future pattern. GEOGRAPHY OF THE REGION This study of the Metropolitan Charlotte area encompasses fifteen counties in the States of North Carolina and South Carolina: Anson, Cabarrus, Catawba, Cleveland, Gaston, Iredell, Lincoln, Mecklenburg, Rowan, Stanly, and Union Counties in North Carolina; and Chester, Lancaster, Union, and York Counties in South Carolina (Figure3). ------- 2 ," Solmi CAROLINA ~-------i '1 IREDELL I , I I I , I , ,.. '... -..... I '''', ...-- \,,' /.., " , I CATAWBA " I ROWAN .... , \ ' --I I ... I , I \ ( \ , \ , I ~" " I ,\ , -- - - ~ - - - - - - - - - - - ~ \ I" ~I I , "~OR1H I \ LINCOLN r----I'""~-- -------,--~,.. I \ I \ CABARRUS I "AROLI NA \ \" I \ I, I \ NoR"ft.J I ~----------7' ~ I STANLY', . In I... \' I CAROLINA I '... GASTON , " I , I ' I \ I I I t I Charlotte'.. I I I " I ,""'., "... " , I , I::... - \ CLEVELAND I I" 1".( ...,... , - - .' , , ..~.,.....'. " ....--..." I """'~',' f YO; - ,~ MECKLENBURc.,""'" UNION : ANSON ( ... ... .. ~ '\ I 1."-" I ' (--.I i/ t<.. ../ I ! ... \ '.." I ... , \ "\ I I ( \ ') I " , , I , '" I I ' , '----' , , I I I , ' I UNION t------------.J L- ,-- I J..- " . ~ CfiESTER '\ LANCASTER" So'mJ I I \' Vin ," I' CARoLINA I .' I " I \ J \ I I \ ,,' I \ .. I J - - - - - - - - - ... ...."", ... I -- , \" ~~ , , '... ~ , ,,' ....._--~ . Y. o . 16 . 32 . miles FIGURE 3 - Metropolitan Charlotte Interstate Study Area \ ------- 3 The study area is located in the piedmont plateau of North and South Carolina, a distinct geographic region formed by the foothills of the Appalachian Mountains on the west and the "fall line" (line of rapids and falls in rivers) in the east. Average elevations descend from about 900 feet above sea level in the western foothills to about 600 feet in the area east of the City of Charlotte. Charlotte is in the geographic center of the Piedmont Cres- cent, an industrial and commercial agglomeration, stretching some 300 miles from Raleigh, North Carolina, on the east, to Greenville, South Carolina, on the west (Figure 4). Charlotte's location in the heart of this region, enhanced by good transportation links along the spine of the Crescent, is responsible for its rank as the largest city in the Carolinas and its importance as a trucking, wholesaling, financial, and administrative center for the Crescent. For a smaller area of perhaps 23 counties within a radius of 40 - 50 miles of the City, Charlotte serves as the major retail and commer- cial center. In the early 1800's, development of the Charlotte area was stimulated by the discovery of gold and the subsequent expansion of gold mining in North Carolina. The State was the leading pro- ducer of the metal until it was overtaken by California in the years following the Western gold rush of 1849. ------- ~_.~.............-.._.._-------......-:- ~-",._-.......,..~-"",,~--~~. 4 '" J' ~ r/ .') - '--'-'-"----'-'--'---.~' '-./", : "" .......~- , ~/_. . , ~\~ - ~ ~/ }o LYNCHBURG / : .../ "ROANOKE. /' / M"; ;~- '--.--e_.V----J. R GIN. I A " 0""- . / / /}-'/ ." - -' / / / ",."... ,.--:-"" / /' " , ~~--'---- DA~v2~-'~ '\ . ~. ~..~_.. -',1 \-", \ / ~ - ,/:.-...- -' ,oV' i - \ . \ - ,. ---j' -. /. /:;:i WINSTON'# ~IILINGTON \,. . .',/ SAL~M.. -, .DURHA~' INOXVllLE ..(1'1'" o,,-",~, ~~.;"'.,~\. ..~.t~'" I. ~/) N 0 ~:~ ),c;; ~ L I N ~ ,/'"" ASHEVILlEQI r,; CHA";TH,' '\ i \ I/"" ,~-~i~\uLJ-" ;' ! .-'-- 7,'. ,/" I " 'GREEN ILLE - -y ) ~.. ~'.' "- ," I WILJoIINGTON \ '.' \ ' SOU T H / " ,/ / \ \, \ ',-" '--, .COlUMJU,r'/ /- / \ .ATlA TA ""'. "" ----- /~/.. // " A~_~TA" CAR 0 L I N A.,/ I \ '" '--------~ --/ // ~,~ 0 R ~~ ~:-- C-H;;:;;~ON -- ", /// . ". ~ \ ". MACON - ~ " ---- ... /' ."'" . COLUMBUS '-.... ( , I ) , . -\ Piedmont Crescent L {-~.... .....- ..', n /- 'I.OJ" // / /// / / .I ,. l t . RICH;OND " / " '" """- ._~- / .I .I / ,/ // /,./ /.- .-,......."" ..-----/ .--- . "'-""- . ------\J JACKSONVILLE ~ ;(\ FIGURE 4 - The Piedmont Industrial Crescent ------- 5 Cotton production was a primary activity of the area in the early nineteenth century, and the cotton textile industry was established by the middle of the century. In more recent times, associated activities such as the production of dyes, chemicals, and textile machinery, as well as textile finishing, wholesaling, sales, and research have been added to the textile manufacturing base of the area. Today, several major textile firms maintain national headquarters in Charlotte. Completion during the 1850's of the first railroad lines in the area, the availability of ample water resources in the Catawba Valley, and the exploitation of rivers for hydroelectric power laid the basis for industrial expansion. Since World War II, the Charlotte study area has participated in and benefited from the rapid economic growth of the Southeastern United States. Its earlier advantages for industrial location have been substantially augmented by the construction of three major interstate highways through the area. 1-85 and 1-77 intersect at the City of Charlotte. When completed, these portions of the inter- state system will provide direct connections between Charlotte and Greenville, South Carolina; Atlanta, Georgia; Columbia, South Carolina; Greensboro, North Carolina; as well as areas to the north across the Allegheny Mountains. A third east-west interstate high- way, 1-40, traverses the northern part of the study area (Figure 5). ------- 6 t , t t ROWAN \ ' , ,t \ I '( , .' , \, '" , '", \ , , '", \ \ .-- - - ~ - - - - - - - - - - -7 ..!.. \ , ~ORn-t : \ LINCOLN Y - - -~ ~;;-C~BA - US- - - - -"- - -\ .cAROLINA , \ " I \ " ,\ ~I,.. I ~ - - - - - - - - - - 7' \ I STANLY', ;"",Rn-t. " . \ , , , CAROLINA ,. "- GASTON,' ' I " , (I 85 I Charlotte ',, , , \ - I " "'. " \ , " : ': '''..' - \ t CLEVELAND . I ". ..:. ,"'.{- --,,1 '.. , ".., \ - - . - - ( YO; - ,'" MEC~~'~NBURG,/ / UNI~~ : AN:ON '("""" I I ,,," I " c-_J v".., I l ... , '..' I ' I \ \; I . l \ ') I \ \ , I , "" , I " I "'---~ I , I , " .J L I .I. " UNION t - - - - - - - - - - - \ - '~ - - , ~ CHESTER \ LANCASTER, SoIJTH " \' I \ '" I " CARoLINA t \ '" t , , \ .2... " ~ I - I I '" ..,," J j--------- -1 ,,"" \....- ......., ~ ~ , ,," ~...._--~- y 1-40 ,,--~- --j \ IREDELL I , I I , , I , , - - ~ " ,- - '( , CATAWBA' SoU1H CAROLINA o . 16 . 32 . miles FIGURE 5 - Metropolitan Charlotte Interstate Study Area, Interstate Highway Sy~tem ------- 7 PRESENT DISTRIBUTION OF POPULATION AND URBANIZATION TRENDS Estimates of 1970 population for each county in the study area are shown in Table I. Mecklenburg County with a population of about 368,000 is by far the largest. Gaston County with about 160,000 people is second. Six counties--Cabarrus, Catawba, Cleve- land, Iredell, Rowan, and York--have populations between 75,000 and 95,000. The remaining seven counties range in population between 24,000 and 54,000. The extent to which the counties in the study area have become or are becoming urbanized can be measured in a number of ways: (1) population growth in the last decade, (2) population density, (3) the proportion of total land in farmland and the reduc- tionin farmland acreage, (4) travel interchange between counties, (5) growth of total employment, and (6) growth of manufacturing employment. Population change during the last two decades for counties in the study area is shown in Table II. The study area population has increased from about 946,000 in 1950 to 1,071,000 in 1960 and about 1,291,000 in 1970. This change represents an averag~ annual increase of 1.3 percent during the 1950's and 1.9 percent in the 1960's. Some counties have added substantial numbers of people in the last decade while others have not. Large increases occurred in Mecklenburg (an increase of about 96,000) and in Gaston (up ------- 8 Table I -- Estimated Population of Metropolitan Charlotte Study Area Counties, 1970 Total Counties (thousands) North Carolina Anson Cabarrus Catawba Cleveland Gaston Iredell Lincoln Mecklenburg Rowan Stanly Union Portion (1,095) 24 77 90 75 159 80 32 368 93 44 53 South Carolina Chester Lancaster Union York Portion (196) 32 45 31 88 Study Area Tota]; (1,291) Source: Metropolitan Charlotte, a report commissioned by the City of Charlotte, 1964. Union (N.C.), Chester, Lancaster, and Union (S.C.) estimates made by Linton, Mields and Coston, Inc. ------- 9 Table II Population Change in the Metropolitan Charlotte Study Area by County: 1950~ 1960, and 1970 195rftl al bl Change Change 1960- 1970- 1950-60 1960-70 North Carolina Portion (772,939) (891,823) (1,094,800 (118,884) (202,977) Anson 26,781 24,962 24,000 - 1,819 - 962 Cabarrus 63,783 68,137 76,600 4,354 8,463 Catawba 61,794 73,191 88,900 11,397 15,709 Cleveland 64,357 66,648 75,300 2,291 8,652 Gaston 110,836 127,074 159,400 16,238 32,326 Irede11 56,303 62,526 79,500 6,223 16,974 Lincoln 37,459 28,814 32,200 - 8,645 3,386 Mecklenburg 197,052 272,111 368,000 75,059 95,889 Rowan 75,410 82,817 93,200 7,407 10,383 Stanly 37,130 40,873 44,200 3,743 3,327 Union 42,034 44,670 53,500 2,636 8,830 South Carolina Portion (172,598) (179,015 (196,500) (6,417) (17,485) Chester 32,597 30,888 32,000 - 1,709 1,112 Lancaster 37,071 39,352 44,800 2,281 5,448 Union 31,334 30,015 31,500 - 1,319 1,485 York 71,596 78,760 88,200 7,164 9,440 Study Area Total (945,537) (1,070,838) (1,291,300) (125,301) (220,462) Sources: ~I pj Estimates taken from Metropolitan Charlotte, Hammer and Associates, 1964. Union (N.C.), Chester, Lancaster, and Union (S.C.) estimates made by Linton, Mie1ds and Coston, Inc. U. S. Census of Population. ------- 10 32,300). Substantial growth has taken place in seven others: lredell up 17,000; Catawba, 16,000; Rowan, 10,000; York, 9,400; Union (N.C.) 8,800; Cleveland, 8,600; and Cabarrus, 8,500. Anson County has experienced a slight decline in the last two decades and three others--Lincoln, Chester, .and Union, South Carolina--reversed small losses in the fifties with small gains in the sixties. . Population density is a good measure of urbanization in the Metropolitan Charlotte study area because the counties are rela- tively small and of similar size. Estimated population densities for 1970 range from a high in Mecklenburg County of 679 persons per square mile to a low of 45 in Anson County (Figure 6). Counties with densities of over 150 persons per square mile are Mecklenburg, Gaston, Catawba, Cabarrus, Rowan, and Cleveland. Reductions in farm acreage provide some indication of urbani- zation. All counties in the study area experienced a decline in land used for farming in the last decade as shown on Table III-A and Table III-B. Between 1960 and 1966, the greatest declines occurred in Gaston, Lancaster, York, Union (S.C.), and Anson Counties. According to the 1964 Census of Agriculture, the propor- tion of all land in agriculture ranged from. a low of 29.6 percent in Union County (S.C.) to a high of 60.5 percent in Union County (N.C.) . Counties with a relatively low proportion of agricultural land, in addition to Union (S.C.) were Mecklenburg, Lancaster, Gaston, Catawba, and Yotk. ------- 11 SoUl1-i CAROLINA "\----- --j 'IREDELL I . I I . : 135 I , r......... - - '"'" " " ,-- \( I ..........., , CATAWBA "... I ROWAN '-- I \ I \ I " \ ,/ \ ( " I 222 , \ 180 " , I \ , ---- ~ - - - - - - - - - -- 4 \ \ ~I.. I I ''jIJRn-i I \ LINCOLN r----.-1._- -------,--..1'r I \ I \ CABARRUS " "tROll NA I \ 104 " " ~RTH I ~----------7' ~'213 I STANLY', . I, " , CAROLINA I ',GASTON' " I I , ~ I , I , I 161 \ I' Char~.otte I" II 110 , I '441 .'". "'... I ' , \ I: ... - \ , CLEVELAND I I'..: ,-.( A'. \ - - . I I '~.,~..' ~' ...---...41> I """,,"',' " YO; - ,~ MECKLENBURG/." UNION: ANSON'.....,.. '. II'''\. 679 / I '.. (-_J \/ ",., 82 I 45 : ... , '," I .. '129 ' '\ I , , , , . ' \, , " \ , : " I' "'---~ , I I " \ ./ L I .1.- " UNION t - - - - - - - - - - - - \ - ...- - , ~ CHESTER ,LANCASTER"', I I ,\ " 60, 'l 55 " 90 "\ , \ . \ , , \ # # , , \ ..' I J - - - - - - - - ~ ....", , , --- ,~.. ,....., , , ',~ I....' ..._---~ y SotnH CAROL! NA o " 16 . 32 . miles FIGURE 6 - Estimated Population Per Square Mile of Metropolitan Charlotte Study Area Counties, 1970 ------- Table III-A Farmland in the North Carolina Portion of the Metropolitan Charlotte Study Area I-' N Farmland Farmland Decrease Farmland Percenta'ge of 1960 a/ 1966 !!/ 1960-66 1964 'E./ Total Land in Counties (~miles) (sq. miles) (sq. miles) (000 acres) Farms, 1964~ Total Farmland (3,773) (3,521) (-252) (1,639) Anson 396 354 -42 166 48.6 Cabarrus 308 283 -25 134 58.1 Catawba 333 301 -32 110 42.2 Cleveland 414 397 -17 158 53.0 Gas to_n 251 191 -60 83 36.4 Iredell 497 472 -25 221 58.5 Lincoln 267 245 -22 100 50.8 Mecklenburg * :/( * 107 30.7 Rowan 399 395 -4 177 53.6 Stanly 324 314 -10 134 52.5 Union 584 569 -15 249 60.5 Sources: al Profile of North Carolina Counties, Statistical Services Center Budget Division, Department of Administration, December 1968. bl County Data Book, 1967, U. S. Bureau of the Census. Note: *Information is not available. ------- Table III-B Farmland in the South Carolina Portion of the Metropolitan Charlotte Study Area Farmland Farmland Decrease Farmland Percentage of 1959 a/ 1964 !!/ 1959-1964 1964 b/ Total Land in Counties (~miles) (sq. miles) (sq. miles) (000 acres) Farms, 1964 Total Farmland (1,093) (914) (-179) (584) Chester 325 294 -31 188 50.2 Lancaster 223 166 -57 106 33.0 Union 197 152 -45 97 29.6 York 348 302 -46 193 44.1 Sources: !!/ Conservation Needs Inventory, Soil Conservation Service, U. S. Department of Agriculture, to be published in 1970. E./ County Data Book, 1967, U. S. Bureau of the Census. ...... w ),' ~ ------- 14 Highway traffic flows provide an excellent index of the linkages between urban activities (e.g., the trip from home to work, or home to shopping place). Figure 7 shows average traffic flows per day on the North Carolina primary highway system for 1968. The strongest linkage, about 40,000 vehicles per day, took place between Mecklenburg and Gaston Counties. Nearly as important were Mecklenburg's links to Cabarrus County (about 26,000 vehicles per day) and to Union County (about 14,000 vehicles per day). The flow of about 25,000 vehicles between Cabarrus and Rowan was also significant. Of lesser importance was the flow of about 8,000 vehicles between Catawba and Irede11 and 10,000 between Mecklenburg and York. Traffic links between other counties were in the range of 2,000 to 6,000 vehicles per day. Trends in the distribution of total employment in the 15- county study area are shown In Table IV. In 1968, Mecklenburg County contained 30.8 percent of the study area's total employ- ment; Gaston, 11.7 percent, Catawba, 9.9 percent; and Cabarrus, 7.4 percent. Between 1962 and 1968, Mecklenburg and Catawba Counties increased somewhat their share of the area's employment, while Cabarrus County's share declinedslight1y. Substantial gains in absolute numbers occurred in Mecklenburg (40,620), Gaston (13,530), and Catawba (15,145). The three Counties accounted for about 63 percent of the employment gain for the area. ------- >%j H CO") c::: ~ t%j ......, t'%j f-' o ~ TRAFFIC MAP AVERAGE 24 HOUR DAY- ALL VEHICLES PREPARED BY THE NORTH CAROLINA STATE HIGHWAY COMMISSION PLANNING AND RESEARCH DEPARTMENT - --.--..- - -0 . 15,000 - 20,000 SCALE OF TRAFFIC VOLUME f-' \J1 ------- 16 Table IV -- Total Employment in the Metropolitan Charlotte Study Area Proportion of 1./ 1./ Study Area Total 1962 1968 Change 1962 1968 North Carolina Portion 383,285 483,020 99,735 85.6 86.5 Anson 7,305 7,890 585 1.6 1.4 Cabarrus 35,645 41,450 5,805 8.0 7.4 Catawba 40,095 55,240 15,145 9.0 9.9 Cleveland 25,130 29,760 4,630 5.6 5.3 Gaston 51,510 65,040 13,530 11.5 11. 7 Irede11 28,720 32,180 3,460 6.4 5.8 Lincoln 8,360 11 , 350 2,990 1.9 2.0 Mecklenburg 130,830 171,450 40,620 29.2 30.8 Rowan 27,040 32,450 5,410 6.0 5.8 Stanly 15,920 19,190 3,270 3.6 3.4 Union 12,730 17 ,020 4,290 2.8 3.0 '1:./ 2/ 1961 1968- Change ] 961 1968 South Carolina Portion 64,710 75,350 10,640 14.4 13.5 Chester 10,140 12,500 2,360 2.3 2.2 Lancaster 14,960 18,700 3,740 3.3 3.4 Union 10,830 11,850 1,020 2.4 2.1 York 28,780 32,300 3,520 6.4 5.8 Study Area Total 447,995 558,370 110,375 100.0 100.0 Source: l/ Profile, North Carolina Counties, Statistic Center, Budget Division, Department of Administration, December 1968. '1:./ Per Interview with Research and Statistics Section, South Carolina Employment Security Commission, April 1970. ------- 17 An analysis of 1968 employment by major categories of employ- ment indicates that the study area is heavily dominated by manu- facturing (Table V). of the area's total employment of 558»370» over 238»000 persons--ahout 42 percent of the total--are engaged in manufacturing. Only in Mecklenburg County is nonmanufacturing employment--construction» transportation, public utilities, trade, finance» services, and government--of major significance. Outside of Mecklenburg County» the proportion of manufacturing employment to total employment in 1968 was over 52 percent. Agriculture is not a major source of employment in any county of the study area. Trends in the distribution and growth of manufacturing employ- ment are shown in Table VI. Gaston County led in 1968 manufacturing employment» closely followed by Mecklenburg» Catawba» and Cabarrus Counties. These four counties accounted for about 55 percent of the study area's 1968 manufacturing employment. Between 1962 and 1968» the largest absolute gain occurred in Catawba County (up about 9»000). Both Rowan and Union (N.C.) made impressive add i- tions to moderate-sized 1962 bases. York» Mecklenburg» and Cabarrus Counties lost a small portion of their share of the study area's manufacturing employment. In 1968» by far the most important manufacturing industry was textiles. Of 477 manufacturing establishments employing more than 100 persons» the textile industry accounted for 264--more than one-half of the total (Table VII). The associated apparel and ------- Table V Profile of Employment by County in the Metropolitan Charlotte Study Area. 1968 ...... Finance. ():) Transportation. Insurance. Total Manufac- Construc- Couununications. and Real Employment turing tion and Utilities Trade Estate Service Government Agriculture Other North Carolina Portion !I (483.020) (199.720) (20.420) (27.750) (75,130) (15.420) (39.120) (39.300) (13.050) (53.110) Anson 7.890 2,470 180 150 810 100 380 1.000 1.260 1.540 Cabarrus 41.450 26.650 920 580 3,880 520 1.780 2.560 960 3.600 Catawba 55.240 30.780 2.140 2,660 7.140 790 3.060 2.540 900 5,230 Cleveland 29.760 13.940 790 500 3.470 560 1.670 2.890 1.930 4.010 Gaston 65.040 38,420 1,440 3,120 6.570 910 3.620 4.340 720 5,900 Irede11 32,180 16.000 1.260 610 3.810 400 2.050 2,580 1 . 770 3,700 Lincoln 11.350 5,690 330 210 1.150 140 700 860 890 1.380 Mecklenburg 171.450 34.930 10.060 18.000 40.300 10.640 20.710 15.490 870 20,450 Rowan 32.450 13,470 1.340 1.290 4.110 720 2,960 3,700 1,110 3,150 Stanly 19.190 10.510 780 340 2,000 230 1.190 1.530 940 1,670 Union 17.020 6.860 1,180 290 1,890 410 1.000 1,810 1.700 1.880 South Carolina Portion ~/ (75.350) (38.450) (2.400) (1.450) (7.650) (1.400) (4.350) (7,100) (4.150) (8.400) Chester 12.500 6,150 400 200 1,250 150 500 1,150 1.050 1.650 Lancaster 18.700 11.050 550 500 1.450 300 1.000 1.200 800 1.850 Union 11.850 6,550 150 200 1,000 150 600 1.100 700 1,400 York 32.300 14.700 1.300 550 3.950 800 2.250 3.650 1.600 3,500 Study Area Total (558.370) (238.170) (22.820) (29,200) (82.780) (16.820) (43.470) (46,400) (17.200) (61.510) Sources: !I North Carolina Work Force Estimates by County. Area, and State, Bureau of Employment Security Research. Employment Security Couunission of North Carolina, August 1969. ~/ South Carolina's Manpower in Industry, Research and Statistics Section. South Carolina Employment Security Couunission, April 1969. ------- 19 Table VI Hanufacturing Employment in the Hetropo1itan Charlotte Study Area Proportion of 1/ 1/ Study Area Total County 1962 1968 Change 1962 1968 North Carolina Portion 152,560 199,720 41,760 82.4 83.8 Anson 1,800 2,470 670 1.0 1.0 Cabarrus 22,280 26,650 4,370 12.0 11.1 Catawba 21,730 30,780 9,050 11. 7 12.9 Cleveland 10,400 13 , 940 3,540 5.6 5.9 Gaston 30,000 38,420 8,420 16.2 16.1 lredell 13,420 16,000 2,580 7.2 6.7 Lincoln 3,750 5,690 1,940 2.0 2.4 Mecklenburg 28,730 34,930 6,200 15.6 14.7 Rowan 8,910 13,470 4,560 4.8 5.7 Stanly 7 , 710 10,510 2,800 4.2 4.4 Union 3,830 6,860 3,030 2.1 2.9 2/ J) 1961- 1968 Change 1961 1968 South Carolina Portion 32,620 38,450 5,830 17.6 16.2 Chester 4,390 6,150 1,760 2.4 2.6 Lancaster 8,900 11,050 2,150 4.8 4.6 Union 5,830 6,550 720 3.1 2.8 York 13 , 500 14,700 1,200 7.3 6.2 Study Area Total 185,180 238,170 47,590 100.0 100.0 Source: 1/ Profile, North Carolina Counties, Statistic Center, Budget Division, Departmen.t of J.oministration, December 1968. 2/ Per Interview with Research and Statistics Section, South Carolina Employment Security Commission, April 1970. ------- Table VII Distribution of Selected Categories of Industry, N o Metropolitan Charlotte Study Area, 1968 (number of establishments employing 100 persons or more) Furniture Machinery Textile and and Counties Apparel Mills Fixtures Paper Electrical Other Total North Carolina P . a/ (44) (234) (41) (9) (22) (85) (435) ort~on - Anson 2 4 2 8 Cabarrus 1 16 1 18 Catawba 8 31 25 1 1 7 73 Cleveland 1 23 1 1 2 28 Gaston 3 88 1 7 9 108 Iredell 10 15 5 1 1 5 37 Lincoln 13 3 1 17 Mecklenburg 9 13 3 4 10 39 78 Rowan 6 12 2 1 1 9 31 Stanly 2 11 1 2 16 Union 2 8 1 1 9 21 South Carolina b/ (5) (30) (2) (5) (42) Portion - Chester 2 5 1 8 Lancaster 1 3 3 7 Union 8 1 9 York 2 14 2 18 Study Area Total (49) (264) (41) (11) (22) (90) (477) Sources: a/ North Carolina Directory of Manufacturing Firms, 1968, The North Carolina Department of Labor. 'p.l Thirty-Fourth Annual Report of the Department of Labor of the State of South Carolina, July 1, 1968 - June 30, 1969. ------- 21 machinery industries (the latter mainly textile machinery) together accounted for an additional 71 establishments; furniture for 41; and paper for 11. Some of the largest plants in the area, each employing more than 1,000 persons, are a textile plant and a tire cord factory in Gaston County; two apparel plants in Cabarrus County; two hosiery mills in Catawba County; a fiber glass plant and a chemicals factory in Cleveland County; two cotton mills in Iredell County; and a chemicals plant in Rowan County. A pulp and paper mill in York County, S. C., employs 700 persons. PROSPECTIVE POPULATION AND ECONOMIC GROWTH According to one set of estimates, based largely on a 1964 research study undertaken for the city of Charlotte, the population of the Metropolitan Charlotte study area is projected to increase about 23 percent between 1970 and 1980, from a total of 1,291,000 to 1,590,000. The annual growth rate implicit in these 1/ "Metropolitan Charlotte", a report prepared by Hammer and Associates for the city of Charlotte, 1964 ------- 22 estimates is 2.1 percent, a rate higher than the 1.9 percent ra~e of growth estimated to have been achieved in the previous decade (Table VIII). U. S. Census Bureau projections for the period 1965-75 suggest a lower annual future growth rate for the study area 2/ population. - Census projections for the Charlotte Standard Metropolitan Statistical Area (Mecklenburg and Union, N. C., Counties) range from 1.8 to 2.2 percent per year, on the basis of two different fertility assumptions. However, for the non- metropolitan areas of both North Carolina and South Carolina, the Census Bureau estimates annual growth rates of only 0.6 ~o 1.0 percent. Weighted by the i970 distribution of population between the Charlotte SMSA and the remainder of the study area, the average annual growth rates for the area would range between 1.0 to 1.4 percent. At t~ese rates, the study area population would increase from 10.5 to 15 percent between 1970 and 1980 to totals at the end of the decade of 1,426,000 to 1,484,000. Whether the population growth rates will decline to these levels or be sustained at higher levels will depend in large part on the area's economic growth. The latter in turn will depend, in the relatively short-term future~ on the expansion of the dominant manufacturing industries of the area, particularly y U. S. Department of Commerce, Bureau of the Census, Projections of the Population of Metropolitan Areas: 1975, Current Population Reports, Series P-25, No. 415, January 31, 1969. ------- " 23 Table VIII Population Forecasts by County for 1970 and 1980" Metropolitan Charlotte Study Area (number of persons) 196#1 bl bl ' Counties 1970- 1980- North Carolina Portion (891,823) (1,094,800) (1,382,100) Anson 24,962 24,000 23,600 Cabarrus 68,137 76,600, 91,000 Catawba 73,191 88,900 ,110,700 Cleveland 66,648 75,300 90,700 Gaston 127,074 159,400 206,400 Iredell 62,526 79,500 96,400 Lincoln 28,814 32,200 36,20Q Mecklenburg 272,111 368,000 514,000 Rowan 82,817 93,200 108,100 Stanly 40,873 44,200 48,700 Union 44,670 53,500 56,300 South Carolina Portion (179,Ol~) (196,500) (206,700) Chester 30,888 32,000 33,000 Lancaster 39,352 44,800 45,400 Union 30,015 31,500 33,000 York 78,760 88,200 95,300 Study Area Total (1,070,838) (1,291,300) (1,588,800) Sources: ~I U. S. Census of Population. 'E./ Metropolitan Charlotte: An Economic Study of its Commercial Development Potential, Hammer and Company Associates, 1964. This forecast was made for a 24-county area encompassing all but Union County, S. C. Forecasts for Union (S.C.), Union (N.C.), Lancaster, and dhester were adjusted slightly to reflect recent population changes not anticipated by the study. ------- 24 textiles. North and South Carolina, together with Georgia, are the leading textile States in the. Nation. Most of the modern, highly efficient plants, notably those producing or utilizing synthetic fibers, are located in these States. During the 1960's, leading firms in the industry invested heavily in product development, technological innovation, and equipment modernization. As a result, an industry formerly labor-intensive is shifting toward a more capital-intensive structure. According to the U. S. Depart- ment of Commerce, some new textile plants represent a capital investment of $40,000 - $50,000 per worker compared to an average gross investment of about $9,000 per worker for all textile plants 1968.1/ in There is little doubt that the outlook for the innovative sectors of the textile industry of the study area will continue favorable, even in the face of intense domestic and international competition. On the other hand, increased efficiency in manufac- ture will mean fewer employees for additional units of output. The National Planning Commission estimates that in the period 1968-80, textile output will grow at an average annual rate of 1.6 percent but that employment will decline at an average rate of 4/ 2.3 percent per year.- y y U. S. Industrial Outlook, 1970 Economic Pro;ections to 1980: Growth Patterns for the Coming Decade, Report No. 70-N-1, March, 1970. ------- 25 In the more labor-intensive portions of the textile industry, as well as in the appa~el and furniture industries of the area, industrial expansion should be accompanied by employment growth although productivity increases can be expected to reduce the rate of employment growth. Over the longer term, economic growth capable of supporting high rates of population increase in the study area may require a more diversified economic base. The textile and apparel industries now dominant in the area, are ones for which demand tends to be relatively inelastic. Thus, as incomes and purchasing power in the Nation rise, the market for textile and apparel products does not rise as quickly. In the last decade, the output of textile mill products, for example, rose only 54 percent while automobile production rose 92 percent. Toward the objective of diversification, Metropolitan Charlotte has the advantage of being a regional center for the Piedmont Crescent which could grow to serve a wider area in the rapidly growing Southeast Region of the United States. ------- 26 PROBABLE DIRECTIONS OF URBAN GROWTH An increase in urbanized land in the study area will occur not only because population and commercial and industrial acti- vity expand but also because space standards will rise. For example, new residential construction may require larger lots, and new plants and shopping facilities, including those relocating inside the study area, will tend to be designed as one-story facilities with large parking areas rather than multi-story build- ings with little auxiliary space. This reduction in density will multiply urban land requirements beyond that associated with increases in pop~lation and economic activity in the past. As shown on Figure 8, the Central Piedmont Regional Council of Local Governments expects most of the prospective urban growth to occur in corridors radiating from Charlotte and extending into Gaston, Cleveland, Iredell, Cabarrus, Union (N.C.), and York Counties. Completion of Interstate Highways 77 and 85 should reinforce the radial pattern suggested by the Piedmont Council. In addition,' it appears possible that growth in Catawba County will proceed eastward on 1-40 to link up with the Mecklenburg County-Iredell County northward expansion along 1-77. The present substantial link between Cabarrus and Rowan Counties could be further strengthened. Urban growth of the remaining counties in the study area is likely to center around existing county seats and other small towns. ------- 27 ~-------i \ IREDELL I , I , I , I , I -.... I -- .... \ I ,- ( I CATAWBA '... , \ I , / , , , , " , , .-- - - ~ - - - - - - - - - --7 I 'LINCOLN r - I \ I I \ , \ I ~RlH: ~----------T CARoLINA ,. 'GASTON I I I I CLEVELAND - - .. ,.. "'... , "', I "'... , , , , ROWAN .... , """-, I \ ( " , " \ \ \ \ \ , "JoRni - \ .\. -C~BA~~S- - --7- - "' {tROll NA , , \ " , STANLY', , I , ' , ' , '''', : \ ... - \ r.l A \ ..., /' ...-----" I "",,'/',' f MECKLENBURG,...." UNION : ANSON (, ... .... "\ I , I '~ (-_J , I ~ .. "..' , ... 1 \ '\\ ; \ '" \ , I I " , '--_-J , I I , ,', J I 1. - " UNION /-------------, L- '~- I ~ CHESTER ,LANCASTER, I' \ \ ," I', I ~ I , I \ ~ ~ I : \ ,,' I J - - - - - - - - -'.J ,."'.. ' , - - , ,,\..' --""..... . , *,' ..._---~ ' ' " SoUltf CAROLINA SoUltf CARoLINA o . 16 . 32 . miles FIGURE 8 - Growth Directions Forecast by the Central Piedmont Regional Council of Local Governments, Metropolitan Charlotte Study Area ------- 28 To provide electric power for future growth, major utility companies in a four-State area (the Carolinas, Virginia, and a portion of West Virginia) are cooperating to provide for a doubling of power requirements by 1980. The Duke Power Company, which is the primary supplier of the Metropolitan Charlotte area as well as a participant in the regional pool, plans the installation of 1,225 megawatts of additional generating capacity in the study area within the next five years. One unit is to be located in the border area between Catawba and lredell Counties and the other in Cleveland County. While the fuel type for these plants is not specified, the Company has hitherto relied almost. exclusively on coal. To date, this coal has been of low sulfur content. However, rising demands for and the limited supply of such coal may make it difficult to assure use of low-sulfur coal in future plants. ------- 29 EVALUATION OF TECHNICAL FACTORS The technical factors of importance in considering the boundaries of a proposed air quality region are: the total quantity of pollutants emitted, the geographic pattern of emission sources, and patterns of pollutant dispersion. In the Charlotte area, information with respect to these factors was obtained from an emission inventory conducted by the National Air Pollution Control Administration (NAPCA), air quality monitoring data obtained locally, and a theoretical diffusion model based on the inventory data and meteorological information. THE EMISSION INVENTORY The emission inventory covered a study area consisting of 12 counties, shown in Figure 11. Five major pollutants were examined in the inventory: sulfur oxides, particulates, carbon monoxide, hydrocarbons, and nitrogen oxides. The complete report of the emissions inventory will be published by NAPCA in a separate document. Data from the inventory will be summarized in this report. ------- 500000 520000 \T , - 139900 000 , I I \! I I 'I (I \R£OHl CO. " ,: : 460000 470000 480000 ! ; : i 540000 . - -,- - ro' ------1--'-- -il'----r-r-~':.---- '39700000 "-)f ~, \.. , CA'AWU .'VUd - --~, ' L I : / ROWA" CO '--" 560000 ,,,,,-~~-, -- - 'I' LPo- 1 /' 'II ""'\ :'1 i ] ' ,'--... . 440000 - - - -J~_.i..__~____n_- _n i'---------- -- --- - . L ---~--f------- :8~_0~~50000 " ;5 i" \ "\ i" '\' :10 .71 ;n ~. /' CATAWBA 'CO .: i : j '-. ; I I 1 . ---,-----1 '\. I ' 1t1:20 Ilr- --- - .10 17 :" I ~......--\..--(-----' i', \ , i' I I " ----------....l.-! I ' \ ) 1 j 1 ! , . , . --06---. .-----..1. . -_.:....-_-+- J39300~C 10 - \' -\11 iil I 1"---"----------- j lI"COL" I CO. I \ i mmus CO. V' ! ""',,.. '"\\------~------~ .""'".,, '~I~.' j=~ /'< ) , " GASTON CO. 1 \. 430000 .- -- ---_.- ') -----L-IU _of' - -......:.---- -"':'---~J910000 --.1 42 ( 141 \.. .. " 17a / -1'/ ~ I' 0 ~--'~'-5.5 ~ \ ' /' i j -1 i I -L ; ", , ! ,~o-- '\ :so 151 10 I" II-~ "t J ' J, ,NORTH CAROLINA: i /'- . I - <----.---- ,i II , 't"" ,... ;L-'1 \ -----?~---_l_..... ..,--.."\-.... . ..- ----SOUTH CAROLINA 11 (1'1 / 15 i 38fOOO / ."" '" I ! '81 -l3rO 000 I I 30 YORK co. , , : I (:-: , I l '" , ') I i \ ! C~" '-0- o 1 ~L______- --- j ,.. c \ " II II CHESTER CO. LANCASTER CO. .r ----- - " '0 " -..---- Figure 11: Grid Coordinate System for the Metropolitan Charlotte Interstate Air Quality Control Region I . I -------...1---- 3850000 \ \ ", L. '3830000 /'/ 3810000 II ~ 5 ~ 10 15 20 ~ o Sf".I, llilft ------- 31 Sources of emissions have been classified into five cate- gories: fuel combustion, industrial process losses, transportation, refuse disposal, and evaporation losses. A summary table of five po11utants--su1fur oxides, particulates, carbon monoxide, hydro- carbons, and nitrogen oxides--emitted from these five source cate- gories is shown in Table IX. Emissions were also attributed to the study area counties where they originated. A percentage summary of emissions by county is shown in Table X. A more detailed summary of three pollutants by county is shown in Table XI. And finally, the study area was divided into grid zones (Figure 11) and point and area sources of sulfur oxides, partic- u1ates, and carbon monoxide attributed to the grids of their origin. This distribution over the 92 grid zones of the study area is shown in Table XII. Significant emissions of sulfur oxides were noted in the grid zones containing electric power generating plants (13, 23, 33, 39, 64) and in grid zone" 81, which contains chemical, kraft paper, and plywood plants. These zones also generated high levels of particulate matter. Particulate levels are high in grid zones containing open dumps (73, 86) and industrial activi- ties such as stone processing (42), lumber, brick and feed plants (75), and foundries and other industrial sources (54). ------- 32 Table IX Summary of Air Pollutant Emissions in the Metropolitan Charlotte Study Area, 1968 (tons per year) Sulfur Partic- Carbon Hydro- Nitrogen Source Oxides u1ates Monoxide carbons Oxides Transportation (3,626) (7,880) (499,850) (44,425) (34,914) Road Vehicles 3,039 6,031 492,362 41,085 31,215 Other Vehicles 587 1,849 7,488 3,339 3,699 Fuel Combustion (196,235) (278,091) (7,586) (2,382) (107,604) Industrial 16,748 28,910 1,055 415 13,347 Power Generation 171 , 934 246,001 2,246 901 89,960 Residential 5,044 1,354 2,360 653 2,785 Commercial and Institutional 2,508 1,825 1,923 411 1,511 Refuse Disposal. (311) (3,261) (17,102) (5,381) (2,102) Incineration 187 954 4,842 1,054 515 Open Burning 144 2,307 12,260 4,327 1,586 Industrial Process Losses 273 78,299 7,676 229 1,376 Evaporation Losses 23,252 Total Emissions 200,465 367,531 532,213 75,669 145,996 ------- 33 Table.X Relative Contribution of Each County to Total Air Pollution Emissions (percent) Sulfur Partic- Carbon Hydro- Nitrogen Counties Oxides ulates Monoxide. carbons Oxides North Carolina Portion Cabarrus 1 1 7 7 3 Catawba 22 10 8 9 18 Cleveland 7 11 .1 1 5 Gaston 49 32 13 15 40 Irede1l .5 1 6 6 2 Lincoln .2 .1 3 3 .8 Mecklenburg 2 9 37 34 10 Rowan 13 23 8 9 11 Union .3 5 4 4 1 South Carolina Portion Chester .2 .1 2 3 .8 Lancaster 1 3 5 5 2 York 3 4 6 4 7 ------- ------------ -- -------- Table Xl 34 Air Pollutant Emissions in the Metropolitan Charlotte Study Area, by Emissions Sources and by County, 1968 (tons per year) Fuel Combustion Commer- cial and Indus- Institu- Residen- Power Total, Fuel Industrial Refuse a/ County trial tional tial Plants Combustion Process Losses Transportation Disposal Grand Total - Cabarrus, N.C. 3,498 150 75 0 3,723 0 498 311 4,529 Catawba 728 55 65 32,443 33,292 2,996 581 45 36,914 Cleveland 1,628 114 84 33,339 35,167 5,861 85 296 41,409 to Gaston 2,152 110 596 107,215 110,074 6,880 1,784 496 119,234 41 Irede11 219 64 55 0 339 2,715 457 114 3,625 .... <11 Lincoln 117 19 34 0 171 7 204 32 414 r-i ;I Mecklenburg 2,057 606 239 0 2,903 25,407 2,518 304 31,132 u ..-4 Rowan 3,905 537 87 73,002 77,533 4,379 546 511 82,969 ... \.< Union 56 53 35 0 145 19,556 302 124 20,127 <11 Po. Chester, S.C. 27 17 20 0 64 0 178 139 381 Lancaster 10,692 46 32 0 10,771 1,295 291 390 12,747 York 3,828 48 27 0 3,904 9,197 431 493 14,025 Cabarrus, N.C. 1,596 240 298 0 2,136 0 244 28 2,408 Catawba 507 108 286 42,107 43,011 0 284 2 43,297 Cleveland 953 174 291 12,760 14,180 0 36 29 14,245 Gaston 1,518 205 2,182 93,717 97,623 0 764 48 98,435 to Irede11 362 136 207 0 705 0 224 15 944 41 Lincoln 178 48 129 0 356 0 99 5 460 'tI oM Mecklenburg 1,436 999 830 0 3,266 3 1,119 60 4,448 >< 0 Rowan 1,704 303 361 23,348 25,718 0 266 41 26,025 \.< Union 172 84 154 0 411 0 147 13 571 ;I .... r-i ;I Chester, S.C. 127 42 64 0 235 0 86 12 333 tI) Lancaster 2,692 68 116 0 2,877 0 142 29 3,048 York 5,498 92 121 0 5,713 270 209 41 6,233 Cabarrus, N.C. 104 226 193 0 525 0 35,772 1,595 37,892 Catawba 28 76 130 554 789 240 39,948 972 41,949 41 Cleveland 54 169 280 152 656 0 2,750 1,392 4,798 'tI Gaston 59 152 508 1,232 1,953 0 64,771 2,522 69,246 ..-4 >< Irede11 13 77 142 0 233 0 29,227 553 30,013 o I:: Lincoln 6 23 105 0 135 40 13,457 146 13,778 o :i: Mecklenburg 81 644 541 0 1,268 580 192,756 1,341 195,945 I:: Rowan 107 301 216 307 933 0 39,220 2,654 42,807 o A Union 5 76 85 0 166 456 20,741 623 21,986 \.< <11 u Chester, S.C. 2 25 57 0 86 0 11,192 713 11,991 Lancaster 204 75 91 0 370 5,620 20,551 2,035 28,576 York 387 75 5 0 468 737 29,458 2,550 33,213 . . N()t~: '1/ Total!' h,'"?' becn r.J'){m::hd ------- Table XI~ 35 Air Pollutant Emissions From All Sources in the Metropolitan Charlotte Study Area, 1968 (Annual Average Tons Per Day) Land Area Sulfur Par tic- Carbon Grid (Sq. Mi.) Oxides u1ates Monoxide 1 154.4 0.3 1.0 8.6 2 38.6 0.0 0.0 0.0 3 38.6 0.1 0.1 1.6 4 38.6 1.1 1.8 41.8 5 38.6 0.6 8.8 22.7 6 154.4 0.4: 0.5 13.7 7 38.6 0.2 0.2 7.9 8 38.6 0.2 0.2 6.8 9 38.6 0.5 4.7 16.4 10 38.6 0.5 2.5 17.3 11 154.4 0.5 0.4 7.4 12 38.6 0.1 10.1 3.2 13 38.6 66.0 206.9 4.7 14 154.4 0.2 0.2 3.2 15 154.4 0.6 0.6 18.6 16 154.4 0.7 0.7 21.6 17 38.6 0.1 0.1 2.0 18 38.6 0.1 0.1 4.2 19 38.6 0.1 0.1 2.4 20 38.6 0.1 0.1 1.6 21 38.6 2.9 5.7 50.3 22 38.6 0.4 0.6 12.6 23 38.6 115.4 88.9 2.1 24 38.6 0.4 1.0 13.3 25 38.6 0.2 0.2 6.3 26 38.6 1.0 3.5 21.5 27 38.6 0.1 0.1 4.4 28 38.6 0.1 0.2 4.2 29 154.4 0.1 0.1 2.2 30 154.4 0.9 1.4 5.1 31 154.4 1.5 16.9 40.9 32 154.4 0.9 1.6 20.8 33 154.4 90.7 214.8 10.6 34 38.6 0.3 0.3 7.5 35 38.6 3.9 8.6 45.1 36 38.6 0.3 0.3 5.8 37 38.6 2.1 3.8 28.1 38 154.4 0.5 0.5 15.5 39 38.6 35.1 91.5 1.0 40 38.6 0.1 0.1 0.4 41 154.4 2.0 6.3 6.5 42 154.4 1.9 17.9 18.8 43 38.6 4.2 3.7 68.1 44 9.6 0.2 0.2 2.1 45 9.6 0.9 2.1 10.1 46 9.6 0.2 0.4 4.1 ------- 36 Table XII (continued) Air Pollutant Emissions From All Sources in the Metropolitan Charlotte Study Area, 1968 (Annual Average Tons Per Day) Land Area Sulfur Partic- Carbon Grid (Sq. Mi.) Oxides ulates Monoxide 47 9.6 0.1 0.1 7.2 48 9.6 0.2 0.2 6.2 49 9.6 0.2 0.2 7.7 50 9.6 1.0 0.7 20.6 51 9.6 0.9 0.8 24.7 52 9.6 0.3 0.4 20.4 53 9.6 0.8 0.9 25.9 54 9.6 2.0 34.9 40.7 55 9.6 1.3 1.6 37.0 56 38.6 1.2 0.9 2.3 57 9.6 2.6 3.4 2.9 58 9.6 0.5 0.4 1.5 59 9.6 0.1 0.1 3.4 60 9.6 1.1 1.8 39.2 61 9.6 1.0 4.7 113.9 62 9.6 1.9 6.7 78.9 63 9.6 0.1 0.1 0.7 64 9.6 167.2 79.8 2.3 65 9.6 0.0 0.0 3.1 66 9.6 0.1 0.1 9.3 67 9.6 0.6 1.2 30.5 68 9.6 0.4 0.9 21. 7 69 154.4 0.6 10.7 45.9 70 154.4 0.1 0.1 4.1 71 154.4 0.6 1.7 11.9 72 154.4 0.3 0.6 9.8 73 154.4 0.7 21.5 37.1 74 154.4 0.5 0.5 23.2 75 154.4 0.5 54.1 21.4 76 154.4 0.1 0.2 2.9 77 38.6 0.1 0.1 1.8 78 38.6 5.8 5.9 39.4 79 38.6 0.0 0.0 0.5 80 38.6 0.1 0.2 2.9 81 154.4 10.1 29.7 18.2 82 154.4 0.4 0.4 13.9 83 154.4 0.3 0.3 11.4 84 154.4 0.2 0.2 5.7 85 154.4 0.7 1.4 16.1 86 154.4 6.6 29.0 20.4 87 154.4 1.2 4.7 40.3 88 154.4 0.1 0.1 2.9 89 154.4 0.0 0.0 1.3 90 154,.4 0.1 0.1 2.1 91 154\ 4 0.2 0.2 5.8 92 154..4 0.2 0.4 6.3 - \- ------- 37 Carbon monoxide concentrations of significance are in grid zdnes where automobile traffic densities are heavy (61). The nature of industrial development in the study area as described in the urban factors analysis is reflected in this analysis of pollutant emissions: there is no single, highly concentrated source of emissions in the area, but substantial ard well-distributed emission sources over the whole area. Sources are found in grid zones to the north, east, south, and west of the central city. To the extent there is a discernible pattern, sources occur along the various waterways in the area. AIR QUALITY ANALYSIS The boundaries of an air quality control region should be designed to include ~ pollution sources and people and property affected by those sources. Sources and source areas have been identified in the preceding section presenting the emission inventory. The inventory does not, however, provide information about the dispersion of pollutants and that relationship to affected people and property. Further examination of air quality data in the study area is necessary before the regional boundary can be determined. ------- 3R The best way to determine the atmospheric distribution of pollutants is to review air quality sampling data which .have been collected at sufficient points over enough time to be useful. Such data, however, are not presently available for the study area, so an alternative modeling technique has been used. It is possible through the use of meteorological diffusion model to predict theoretical concentrations of pollutants in the air. The model, based on mathematical treat- ment of pollutant emission from the inventory and meteorological factors such as wind speeds, direction" and mixing depths has generated the theoretical dispersion maps shown in Figures 12, 13, and 14. Although the model has certain inherent limitations, it can be used as an indicator of probable relative concentrations throughout the study area. Meteorology and Climatology The ebb and flow of air through the study area is, of course, an important consideration in the determination of appropriate regional boundaries. The study area, located in the southern Piedmont, is sheltered from extreme effects of polar air masses and enjoys a moderate climate characterized by cool winters and quite warm summers. ------- 39 SouTH CARoLI NA o . 16 . 32 . miles FIGURE 12 - Theoretical Annual Average Concentrations of Sulfur Oxides. Values in Micrograms per Cubic Meter ------- 40 .. I ANSON ,"'.... I I I I I I I I I I I SoUTH CARoLINA o . 16 . 32 . miles FIGURE 13 - Theoretical Annual Average Concentrations of Particulates. Values in Micrograms per Cubic Meter ------- 41 / ~-------- \ , '. IRED ELL I , I I I C-_J " . , \ \ " ~---( " UNI t-------- I 5 ~ CHESTER I I I " I , I ,/ ~' ----- -, '.. --- \ \ , , , '( ..., '"... , " \ .. I , , , , , , ~- SouTH CARoLI NA \ \ I I . \ \ - - - --~ \ \ ~ , ... .. ~I\ .,' , .. , ,,' " o . 16 . 32 . miles FIGURE 14 - Theoretical Annual Average Concentrations of Carbon Monoxide. Values in Micrograms per Cubic Meter ------- 47 Winter weather is changeable, alternating between mild and cool and only occasional cold periods. Summers are long and warm with considerable cooling at night and frequent thunderstorms. The area is far enough inland not to be severely affected by coastal storms and hurricanes. Average wind speeds in the area are about 7 m.p.h. and tend to be southwesterly. The region is characterized by frequent low wind speeds, stagnant air masses, and temperature inversions. Over the past twenty years, stagnation periods of over four days each have been noted 70 times. Inversions are present over 45 percent of the time, and nighttime winds of less than seven miles per hour can be expected 70 percent of the time (Figure 15, Table XIII). Table XIII Air Mixing Depths, Metropolitan Charlotte Study Area (meters) Winter Summer Annual MORNING 330 370 335 AFTERNOON 930 1,700 1,410 AVERAGE 630 1,035 870 These weather conditions, coupled with extensive use of coal as an energy source, create air ~ollution potentials of a serious nature which will require a strong regional program. ------- WINTER SUMMER 43 ANNUAL (Includes All Four Averaging Periods) PERCENT FREQUENCY o 5 10: 15 FIGURE 15 - Wind Direction Percent Frequency of Occurrence for Various Averaging Times ------- 44 Air quality data collected by the Charlotte-Mecklenburg County Health Department appear to be consistent with the con- elusions of the inventory and diffusion model. The annual average (1969) air quality measurements from the Health Depart- ment are shown below. Measured Range Average Suspended particulates 3 13 - 251 jJ- g/m 2 2.74 - 60.1 tons/mi /mo. 3 78,u.g/m Dustfall 2 17.41 tons/mi /mo. Soiling index o - 3.2 COH 0.6 COH Nitrogen oxides 0.014 - 0.400 ppm 0.111 ppm Sulfur oxides 0.000 - 0.060 ppm 0.009 ppm ------- 45 REGIONAL GOVERNMENTAL ORGANIZATION In the Metropolitan Charlotte study area, eight types of regional entities may be distinguished: 1) regional planning bodies 2) sub-state planning districts 3) clearinghouses for Federally assisted projects 4) law enforcement districts 5) a resource conservation and development area 6) a health planning area 7) manpower planning districts 8) air pollution cpntro1 agencies The study area counties have combined in many different ways to form these regional organizations. For example, the Courity of Mecklenburg is in itself a Comprehensive Health P1an- ning Area; it has joined with Union, Cabarrus, and Irede11 Counties to form a law enforcement district; it cooperates in an eight-county council of government; and so on. Regional Planning Bodies There are two regional planning bodies in the study area-- a Council of Governments (COG) and a regional planning commission. The Central Piedmont Regional Council of Local Governments (CPRCLG), a voluntary public agency, was formed in 1968 to undertake ------- 46 regional and intergovernmental coordination and to help member local 'governments meet various planning requirements for Federal grants-in-aid. Membership consists of eight counties and fifteen municipalities in the North Carolina portion of the Metropolitan Charlotte study area (Figure 16). A majority of the representa- tives on the Council's policy board are elected local officials-- mayors and county commissioners. The Council's work program stresses environmental problems: water and sewer system planning, solid waste disposal, and air pollution. In the next two years, substantial effort will also be directed toward airports, high- way and transit systems, land use patterns, housing, and health. In the South Carolina portion of the study area, a four- county regional agency, the Central Piedmont Regional Planning Commission (CPRPC) has recently been established for the purpose of areawide planning (Figure 16). Sub-state Planning Districts Both North and South Carolina have divided their respective state areas into multi-county sub-state planning districts. North Carolina has proposed, but not yet officially designated, a ten- county district, and South Carolina has designated a four-county district in the Charlotte area. These are shown in Figure 17). Clearinghouses In accordance with the Intergovernmental Cooperation Act of ------- 47 l I I " , r:H~:Sn:R ~ N TF.R ". SoLITrl '\ ! " CARoLINA \ . ;~ , '.. ,." ,. ~ - - - - -.- - - - - -1=:-;,/"10\...'" ;;,'" '.~ \~' ...----- ..... I I o 16 . 32 . M}M~ Central Piedmont Regional Council of Local Governments miles - Central Piedmont Regional Planning Commission FIGURE 16 - Regional Planning Bodies Charlotte Study Area. in the Metropolitan ------- 4R r-m CAAo Solffif CAAo o . 16 . miles 32 . 1I1I I --. ... 11 ... , ... I - T " 11. ~11-1 --- -~-- ---- -- --....,.. -, 'AROLINA . 1 , -- - - -' ~ m UNA ' '. " ' ! I ' T '.- I " . .. .- -- I -. - ,. .. -T - -- ," - ~ , ,,,,,,,,, ... ~ . 7 ~.. ,. I ~ \ ~ UNA \ . -~ I II' J I - I \ I SoUlH \ I I ~ CARoLINA L~ \ ---- ... ~~ North Carolina Sub-state Planning District South Carolina Sub-state Planning District FIGURE 17 - Sub-state Planning District, Metropolitan Charlotte Study Area. ------- 49 1968, the Central Piedmont Regional Council of Local Governments and the Central Piedmont Regional Planning Commission have been designated as clearinghouses. Through the clearinghouses, Federal development assistance is coordinated with State, regional, and local comprehensive planning. As clearinghouses, CPRCLG and CPRPC are responsible for review of project proposals and applications for Federal assistance sub- mitted by localities. Law Enforcement Districts The Justice Department is authorized to make grants to States for planning and improvement of public protection, recruitment, construction of facilities, education, training, and other aspects of law enforcement in local areas. North Carolina has four law enforcement districts in the Metropolitan Charlotte study area, having the following composition of counties: (1) Gaston County; (2) Lincoln and Cleveland Counties; (3) Mecklenburg, Union, Cabarrus, and Iredel1 Counties; and (4) Catawba. South Carolina has one law enforcement district affect- ingthe study area which includes York, Union, Chester, and Lancaster Counties. Resource Conservation and Development Project Areas The Department of Agriculture makes grants to local govern- ments for resource conservation and land use planning. A six- ------- 50 county Resource Conservation and Development Project Area has been designated in northern South Carolina which includes four counties in the study area (York, Union, Chester and Lancaster Counties). Comprehensive Health Planning Area The Public Health Service, provides, through state health planning agencies, grants to local governmental organizations for comprehensive health planning. Within the study area, Mecklenburg County is the only Comprehensive Health Planning Area. Cooperative Area Manpower Planning System Areas The Federal Cooperative Area Manpower Planning System (CAMPS) provides for committees made up of local representatives of Federal, or Federally-supported, manpower programs. The respon- sibility of a CAMPS committee is the coordinated planning of all manpower programs for a particular area. Four CAMPS committee areas have been established in the Metropolitan Charlotte area having the following County composition: (1) Mecklenburg, Cabarrus and Union (N.C.) Counties; (2) Gaston, Cleveland, Lincoln, and Catawba Counties; (3) Union County (S.C.); and (4) York, Chester, and Lancaster Counties. ------- 51 Air Pollution Control Agencies In North Carolina, the State agency responsible for air pollution control is the North Carolina Board of Air and Water Resources. The Air Pollution Control Division of the State Board has a staff of thirteen and a budget of $163,500 for fiscal year 1970, with about $350,000 anticipated for fiscal year 1971. Five local air pollution programs established in the North Carolina portion of the study area include the following County groups: (1) Mecklenburg County; (2) Gaston County; (3) Rowan County; (4) Lincoln and Catawba Counties; and (5) Cleveland County. These local programs are administered either by air pollution boards or by county health departments. They are responsible directly to the North Carolina Air and Water Resources Board. Mecklenburg County is providing technical assistance to Gaston County and to Lincoln and Catawba Counties on their programs. Similar cooperative arrangements between Mecklenburg County and Irede11 and Union (N.C.) Counties have been discussed. In the South Carolina portion of the study area, the South Carolina Pollution Control Authority is the State agency respon- sible for air quality control. The Authority has a present staff of ten with 31 additional positions authorized for 1971. Its 1970 budget is $240,000 and the 1971 budget is expected to be $415,000. No local control agencies have been created in the South Carolina portion of the study area. ------- 5? The States of North and South Carolina have the power to cooperate in an Interstate Air Quality Control Region. North Carolina statutes permit cooperation between localities (both inside and outside North Carolina), but North Carolina law may reserve to the State exclusive authority to regulate air quality. In both States, authority to form interstate planning agencies (as distinguished from regulatory agencies) has been given to local governments. ------- S3 PROPOSED AIR QUALITY CONTROL REGION Subject to the scheduled consultation, NAPCA proposes for designation an air quality control region in the Metropolitan Charlotte area consisting of the following counties shown on Figure 18: In North Carolina Cabarrus Cleveland Gaston Mecklenburg Union In South Carolina Lancaster York An air quality control region should meet three basic criteria: 1. It should encompass most pollution sources as well as most people and preperty affected by the sources. 2. It should include those areas where industrial and residential growth may create significant future problems. 3. It should be consistent with unified and cooperative administration of the region's air resources. The proposed seven-county region for Metropolitan Charlotte is the minimum area which satisfies the criteria. ------- 54 ..------ --- \ I \ IREDELL I I I , I , I , I - ""\ I - - \' ,- ( I CATAWBA " , \ , ... I , I , I \ , I , -----------~ LINCOLN t , \ I t , " '" GASTON I " , t \ , I Charlot te I, " I," "". '" \ I::' I I "" ,,: ,"" J '.'~.' I YO~- ~~ MECKLENBURG/'/ I~',\ ,/ \, "," \ " , NoR11i CAROLI NA CLEVELAND SOUTH CAROLI NA /'..... - -- I " UNION I \ , " I " . I , I \ ,/ ~----------- -, J ...._---~ CHESTER o . 16 . 32 . miles Fir>'1re 18: ,.... I "'... I ' I '.. I ROWAN '.... t --I , , ( " \ "'... \ ' \ \ \ , NORTH CABARRUS - -'-. .cAROL! NA , \ STANLY', I t I I \ - , '... ... , ~', ~ '( " ANSON, ... .. \ ... .. I \ .. , \ \ , , , , .1.- UNION 1 L- LANCASTER Proposed ~~_tropoH tan--'Chailot_te Interstate ~\!_~~~~J_~y -_Co_1'!~_~Q,!_Reg}~~-- SolITH CAROL! NA ------- 55 The discussions in preceding sections of technical, urban, and governmental factors relevant to a determination of the Region's boundaries lead to the following conclusions: 1. Sulfur oxides, particulates, and nitrogen oxides pollution sources are concentrated mainly in Gaston, Catawba, Rowan, and Cleveland Counties. The remaining major sources are in York and Mecklenburg Counties. If present piants for construction of new power plants are carried out, Iredell County may also become a major source of these pollutants and the contribution of Catawba and Cleveland Counties may increase. Carbon monoxide and hydrocarbon sources are widely dispersed throughout the study area counties, but primary concentrations exist in Mecklenburg, Gaston, Rowan, and Catawba Counties. The people and property in these major pollution source counties are affected by the dispersion of pollutants. Lower level effects encompass portions of Cabarrus, Lincoln, Iredell, Union (N. C.), and Lancaster Counties, despite the fact that these counties are not major pollution sources at the present time. 2. Population densities are highest in Mecklenburg, Gaston ------- 56 and Catawba Counties, with Rowan and Cleveland following close behind. Growth of population during the last decade has beert most pronounced in Mecklenburg, Gaston, Irede11, and Catawba. Due to the influence of Interstate 77 and Interstate 85, it is anticipated that future urban development in Iredell, Cabarrus, and Cleveland Counties will be significant. Manufacturing employment is largest in Gaston, Mecklenburg, Catawba, and Cabarrus Counties. Growth of manufacturing employment during the period between 1962 and 1968 was most noticeable in Catawba, Gaston, and Mecklenburg Counties. A large portion of the manufacturing employment in the area is involved in textiles, apparel, and furnitu~e production, The city of Charlotte serves as a financial and service center for the regional economy. 3. A multiplicity of intergovernmental cooperation organizations exist in the study area. In North Carolina, local air pollution control districts have been established on a single county basis in Mecklenburg, Gaston, Rowan, and Cleveland Counties, and for the two-county area of Lincoln and Catawba Counties. South Carolina has not established local air pollution control districts. ------- 57 It appears from these conclusions that the seven-county proposed region constitutes the minimum aree for a comprehensive approach to the region air pollution problem. Although Catawba is not among the seven counties proposed, there are strong reasons for adding Catawba to the region. It has nearly the same manufacturing employment as Gaston and Mecklenburg, and the growth of manufacturing employment during the middle sixties was greater in Catawba than in either Gaston or Mecklenburg. Catawba emits a greater percentage of the sulfur oxides and particulates than Mecklenburg. Production of electrical power from plants in Catawba may be increased in the near future. Catawba has recognized the need for air pollution control by forming a local program with Lincoln County. On the basis of these facts, it would seem that Catawba would be a natural candidate for inclusion in the air quality control region. It can be argued that Catawba does not need to be included in the region because it is separated from Gaston and Mecklenburg by Lincoln County, which has a low population density, low manufacturing employment, and low growth expectation. On the other hand, since Lincoln County is not large, the buffer zone is relatively narrow, if it can be said to exist at all. Therefore, the National Air Pollution Control Administration recommends that Catawba County should be carefully considered for inclusion in the Charlotte Region during the discussion at the consultation, ------- 58 .and further suggested that if Catawba is not included in the initial designation of the Charlotte Region following the consultation, it should be reconsidered periodically for possible inclusion at a later date. It is evident that the inclusion of Catawba in the Region would require the inclusion of Lincoln County also, since Lincoln lies between Catawba and the remainder of the Region. Iredell is another county which has lihks with the Charlotte area but which is not included in the proposal. Population, manufacturing employment, and recent growth in manufacturing employment for Iredell are all smaller than for Catawba, but the population growth of Iredell for the past decade has been larger than for Catawba. Interstate 77 will promote rapi.d development in Iredell County in the future. The possibility that a new power plant may be located in Iredell is another indication of its interdependence with the metropolitan Charlotte area. If future population and industrial growth in Iredell create an increasing linkage with the regional air pollution problem, the situation should be reviewed to determine if inclusion of Iredell is warranted by the altered conditions. Rowan is a third County which deserves further consideration even though it is not included in the proposed region. The population density and manufacturing employment of Rowan are comparable to those of Cleveland County. Population growth during the sixties was similar for Rowan and Cleveland. They are both linked to Charlotte by Interstate 85. Pollutant ------- 59 emissions from Rowan ate generally somewhat higher than those from Cleveland. Therefore, it might seem inconsistent to include Cleveland in the proposed region but exclude Rowan. However, Rowan appears to be more closely linked to the Greensboro and Winston-Salem area than to the Charlotte area. Therefore, Rowan was not included in the proposal in anticipation of the possibility that it might be included in a regional approach to air pollution control focussed on the Greensboro and Winston- Salem area. It appears at the present time that additional counties on the periphery of those discussed are not required in the air quality control region in order to provide for a comprehensive approach to the regional problem. ------- |