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
District of Columbia
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.
CWNS 2012 District of Columbia documented needs
Category
Category
Percent
I Secondary Wastewater Treatment
Advanced Wastewater Treatment
Conveyance System Repair
V Combined Sewer Overflow Correction
VI Stormwater Management Program
X Recycled Water Distribution
IV New Conveyance Systems
Category V
Combined
Sewer Overflow
Correction
$1,885M, 67.4%
Category I
Secondary Wastewater Treatment
$147IVI, 5.3%
Category II
Advanced Wastewater
Treatment
$185M, 6.6%
by category (January 2012 dollars in millions).
Category III
Conveyance
System
Repair
$574M, 20.5%
IV
New
Conveyance
Systems
Improvements in treatment level of District of Columbia'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 Secondary"
-(0)
-(0)
-(0)
-(0)
-
-
Secondary
-(0)
-(0)
-(0)
-(0)
-
-
Greater than Secondary
1.3(1)
1.6(1)
2.2 (1)
2.5 (1)
34.1%
16.9%
No Discharge
-(0)
-(0)
-(0)
-(0)
-
-
Partial Treatment
-(0)
-(0)
-(0)
-(0)
-
-
Total
1.3(1)
1.6(1)
2.2 (1)
2.5 (1)
34.1%
16.9%
1 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 District of
Columbia needs
for the 2004-2012
CWNS by category
(January 2012
dollars in millions).

2200

2000

1800


at
c
1600
o
1400
F
1200
L~--'
1000


(U
800
o
600
o
400

200

0
¦
i l2004
~	2008
~	2012
IV
Needs Category

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