Indiana
Clean Watersheds Needs Survey 2008
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
Section 516 (b). Indiana documented
needs totaling $7.7 billion in 2008.
This is a 2 percent decrease from the
$7.9 billion in needs documented in
2004.
Documented Needs in Indiana
Needs (2008 Dollars, Millions)
Type of Need
2004
2008
Percent Change
Wastewater treatment
$251
$813
224%
Pipe repair and new pipes
$334
$1,113
233%
Recycled water distribution
nra
nr
0%
Combined sewer overflow correction
$6,355
$5,041
-21%
Total Wastewater Treatment Needs
$6,940
$6,967
0%
Conveyance infrastructure
n/a
$29
n/a
Treatment systems
n/a
$16
n/a
Green infrastmcture
n/a
$2
n/a
General stormwater management
$16
$107
569%
Total Stormwater Management Needsb
$16
$153
856%
Agriculture (cropland) best management practices (BMPs)
$5
$9
80%
Agriculture (animals) BMPs
$4
$2
-50%
Silviculture (forestry) BMPs
<$0.5
<$0.5
-69%
Ground water protection: unknown source BMPs
nr
<$0.5
n/a
Marinas BMPs
nr
nr
0%
Resource extraction BMPs
<$0.5
<$0.5
-47%
Brownfields remediation
nr
nr
0%
Storage tank remediation
nr
nr
0%
Sanitary landfills BMPs
nr
nr
0%
Hydromodification (Water resource restoration and protection)
<$0.5
$5
>1,000%
Other estuary management activities0
n/a
nr
n/a
Total Nonpoint Source Control NeedsM
$10
$15
56%
Total Decentralized Wastewater Treatment Needsb'd
$912
$561
-38%
Total Needs
$7,877
$7,696
-2%
aNot reported; Actual needs may be higher, since documenting these needs is difficult; °In 2004, Other Estuary Management
Needs were reported under Separate State Estimates (SSEs); dNot included in Official Needs in the Report to Congress.
1 Documented needs in the CWNS include the unfunded capital costs of projects as of January 1, 2008 that address a water
quality or a water quality-related public health problem existing as of January 1, 2008, or expected to occur within the next 20
years; and meet the seven CWNS documentation criteria. All needs are in January 2008 dollars.

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Indiana
Clean Watersheds Needs Survey 2008
Wastewater Treatment Facilities
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.
•	Quality of effluent treatment from wastewater treatment facilities.
In 2008, 70% of Indiana residents received centralized wastewater treatment services at the secondary,
advanced, or no discharge treatment level, compared to 40% in 1972.
Number of Centralized Treatment Facilities and Population Served
Number of Facilities
Population Served
%Total	%Total
Population	Population
Treatment Level
1972
2008
Projected"
1972
1972
2008
2008
Projected3
Less than Secondary
22
0
0
417,000
8
0
0
0
Secondary
70
140
136
893,000
17
497,308
8
544,176
Advanced
67
274
282
1,215,000
23
3,920,273
62
4,345,355
No Discharge
0
1
2
0
0
175
<1
469
Total
159
415
420
2,525,000
48
4,417,756
70
4,890,000
a Number of facilities and population served if all needs documented in the CWNS 2008 are met.
Small Communities
In Indiana, small community
wastewater facilities serve 27% of the
population and comprise 14% 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
Facilities

1 Needs (2008 Dollars, Millions)
Population
2004
2008
2004
2008
0-999
24
18
$51
$38
1,000-3,499
46
45
$218
$217
3,500-10,000
64
69
$995
$742
Total
134
132
$1,261
$998
Visit www.epa.gov/cwns for more information including:
•	Detailed Reports to Congress
•	Other state fact sheets
•	Maps, charts, and data downloads for projects, facilities, watersheds, counties, congressional
districts, cities, states, and regions

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