Clean Watersheds Needs Survey 2012
Distribution of total official needs by State
(January 2012 dollars in billions)
Total documented needs = $271.0 Billion
Range	I 1 I 1 I 1 1 1 I 1
>$25B $5-$25B $2.5-$5B $1-$2.5B <$1B Did not participate
Illinois
The Clean Watersheds Needs Survey (CWNS) is a
comprehensive assessment of needs 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).
Visit www.epa.gov/CWNS for more information.
Category
Percent
I Secondary Wastewater Treatment
II Advanced Wastewater Treatment
III Conveyance System Repair
iV New Conveyance Systems
V Combined Sewer Overflow Correction
VI Stormwater Management Program
X Recycled Water Distribution
Category VI
Stormwater
Management Program
$88M, 1.3%
Category V
Combined Sewer
Overflow Correction
$1,632M, 25.0%
Category II
Advanced
Wastewater
Treatment
$223M. 3.4%
Category IV
New Conveyance Systems
$587M, 9.0%
Category III
Conveyance
System Repair
$1,120M, 17.1%
Category I
Secondary Wastewater Treatment
$2,886M, 44.1%
CWNS 2012 Illinois documented needs by category
(January 2012 dollars in millions).
Improvements in treatment level of IIDinois's publicly-owned wastewater treatment plants.

Population served in millions (number of facilities)

Projected
Level of treatment
2004
2008
2012

2032
from 2008-2012
from 2012-2032
Less than Secondary8
-(0)
-(0)
-(0)
-(0)
-
-
Secondary
0.7 (417)
0.7 (384)
0.6 (173)
0,7 (174)
-13.3%
18.3%
Greater than Secondary
10.1 (297)
10.7 (285)
10.4 (233)
11.9 (273)
-2.1%
14.2%
No Discharge
<0.1(2)
<0.1(4)
<0.1 (10)
<0.1 (13)
58.9%
160.1%
Partial Treatment
-(5)
"(2)
-(0)
-(0)
-
-
Total
10.8 (721)
11.4 (675)
11.1 (416)
12.7 (460)
2.8%
14.7%
* Includes facilities granted section 301(h) waivers from secondary treatment for discharges to marine waters. As of January 1, 2012 waivers for 36 facilities in the CWNS 2012 database had been
granted or were pending.
Total Illinois needs
for the 2004-2012
CWNS by category
(January 2012
dollars in millions).
14,000
13,000
12,000
11,000
10,000
9,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
I 12004
~ 2008
~~2012
Needs Category

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