Mississippi
                           dean Watersheds Needs Survey 2004
 The Clean Watersheds Needs
 Survey (CWNS) is a comprehensive
 assessment of needs1 to meet the water
 quality and water-related public health
 goals of the Clean Water Act (CWA).
 States and the U.S. Environmental
 Protection Agency (EPA) conduct the
 CWNS every four years under CWA
 Sections 205(a) and 516 (b)(l).

 Mississippi reported needs totaling $2.6
 billion in 2004. This is a one hundred and
 sixty-eight percent increase from the $1.0
 billion in needs reported in 2000.
County Needs ($M)
   | None reported

  ^ 5-30
^H > 30

Facility Needs ($M) 
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                                        Mississippi
                          dean Watersheds Needs Survey 2004
The enactment of the Clean Water Act (CWA) in 1972 resulted in dramatic improvements in the:
   •  Number of wastewater treatment plants.
   •  Percentage of the population served by wastewater treatment plants.
   •  Level of effluent treatment from wastewater treatment plants.

In 2004, 61% of Mississippi residents received centralized wastewater treatment services at the secondary,
greater than secondary, or no discharge treatment level, compared to 26% in 1972.
                      Number of Centralized Treatment Facilities and Population Served
Treatment Level
                        Number of Facilities
1972    2004  Projected"     1972
                                            Population Served
                                     % Total                % Total
                                    Population              Population
1972
2004
2004"    Projected3
Less than Secondary
Secondary
Greater than Secondary
No Discharge

44
19
8
0
' A
0
208
84
19S

0
297
96
19S
511,000
446,000
153,000
1 11ft ftftft

21.8%
19.0%
6.5%
47 1%

0
1,132,063
641,674
i 775 009

0%
39.0%
22.1%
61 1%

0
1,005,136
1,679,237
1 68S 07S

a Number of facilities and population served if all needs documented in the CWNS 2004 are met.
b The remaining population is largely served by home and cluster sewage treatment systems.
(Number of facilities from Tables C-7 and C-8 of the CWNS 2004 Report to Congress)
   What are treatment levels?
   •   Less than secondary treatment removes solids by filtration, sedimentation, and chemical coagulation.
   •   Secondary treatment removes most of the organic matter in wastewater using biological processes.
   •   Greater than secondary treatment removes additional organic matter, nitrogen, phosphorus, or toxics.
   •   No discharge facilities include facilities that reuse wastewater, discharge to an underground aquifer, or
       dispose of wastewater via methods such as irrigation or evaporation.
   The CWA goals of fishable, swimmable and drinkable waters require secondary or greater treatment.
 Small communities often need additional assistance to meet CWA requirements, because they often lack
 adequate financing, training, and economies of scale to efficiently manage and maintain wastewater treatment
 systems.

 In Mississippi, small community wastewater
 facilities serve 30% of the population and
 comprise 39% of total wastewater treatment
 and collection needs. EPA small community
 support information is available at:
 www. epa. gov/owm/mab/smcomm
Reported Needs for Facilities in Small Communities
Population
< 1,000
1,000-3,499
3,500-10,000
Total
Facilities
2000 2004
136
63
29
228
239
90
31
Needs (2004 Dollars, Millions)
2000 2004
$112
$108
$116
360 $336
$173
$150
$91
$414
          Detailed Reports to Congress
          Other state fact sheets
          Maps, charts, and data downloads for watersheds, counties, congressional districts, states,
          and regions
         Office of Water, Office of Wastewater Management; 1200 Pennsylvania Ave., N.W. (Mailcode 4204M), Washington, DC 20460
                                     EPA-XXX-X-XX-XXX; Month XX, 2007
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