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
California
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). California did not have
the resources to complete the updating of their data for
the 2004 Survey.
Visit www.epa.gov/CWNS for more information.
Category VI
Stormwater
Management Program
$3,924M, 15.0%
Category V
Combined Sewer
Overflow
$354M, 1.3%
Category IV
New Conveyance
Systems
$2,862M, 10.9%
Category II
Advanced
Wastewater
Treatment
$2,584M, 9.8%
Category III
Conveyance System Repair
$6,491M, 24.7%
Category X
Recycled Water Distribution
$2,180M,
Category I
Secondary Wastewater
Treatment
$7,863M, 30.0%
CWNS
2012 California documented needs by category
(January 2012 dollars in millions).
Category
Secondary Wastewater Treatment
$M Percent
7,863
30.0
Advanced Wastewater Treatment
2,564
9.8
Conveyance System Repair
6,491
24.7
New Conveyance Systems
2,862
10.9
Combined Sewer Overflow Correction
354
1.3
Stormwater Management Program
3,924
15.0
Recycled Water Distribution
Total
2,180
26,238
8.3
100.0
Improvements in treatment level of California's publicly-owned wastewater treatment plants.

Population served in millions (number of facilities)
Population change
from 2008-2012
Projected
population change
from 2012-2032
Level of treatment
2004"
2008"
2012b
2032
Less than Secondary3
1.9(3)
1.9 (4)
2.2 (4)
2.6(3}
10.9%
18.6%
Secondary
17.8(186)
18.7 (139)
22.4 (143)
22.0 (134)
19.8%
-1.8%
Greater than Secondary
8.7 (84)
10.6 (89)
10.8 (93)
17.7 (102)
2.1%
64.0%
No Discharge
3.9 (334)
4.1 (332)
4,4 (255)
5.9 (258)
9.1%
33.0%
Partial Treatment
-(12)
-(6)
-(2)
- (2)
-
-
Total
32.4 (619)
35.2 (570)
39.8 (497)
48.1 (499)
12.8%
21.0%
3 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.
b This table contains best available information from States and Territories that did not have the resources to complete the updating of the data or did not participate in the CWNS 2004 or 2008. In these
circumstances, information for this table was taken from previous surveys.
Total California
needs for the
2004-2012 CWNS
by category
(January 2012
dollars in millions).
14,000
13.000
12,000
2004
~	2008
~	2012
11,000
£ 10,000
7,000
5,000
4,000
3,000
Needs Category

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