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
Maryland
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 X
Recycled Water
Distribution
$19M, <1%
Category VI
Storinwater
Management—
Program
$3,173M, 32.0%
Category I
Secondary
Wastewater Treatment
$997IVi, 10.0%
Category V
Combined Sewer
Overflow Correction
$345M, 3.5%
CWNS 2012 Maryland documented needs by category
(January 2012 dollars in millions).
Category II
Advanced Wastewater
Treatment
$1.286M. 13.0%
Category III
Conveyance
System Repair
$2,492M, 25.1%
Category IV
New Conveyance Systems
$1,616M. 16.3%
Category
$M
Percent
I Secondary Wastewater Treatment
997
10.0
II Advanced Wastewater Treatment
1,286
13.0
III Conveyance System Repair
2,492
25.1
iV New Conveyance Systems
1,616
16.3
V Combined Sewer Overflow Correction
345
3.5
VI Stormwater Management Program
3,173
32.0
X Recycled Water Distribution
19
<1
Total
9,927
100.0
Improvements in treatment level of Maryland'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 Secondary3
-(0)
-(0)
-(0)
-(0)
-
-
Secondary
0.9 (75)
0.2 (62)
0.1 (62)
<0.1 (43)
-37.8%
-45.1%
Greater than Secondary
2.0(73)
2.9 (88)
3.0 (94)
3.9 (114)
4.2%
29.0%
No Discharge
<0.1(5)
<0.1 (12)
<0.1 (17)
<0.1 (19)
12.4%
74.4%
Partial Treatment
-(2)
-(5)
-d)
-d)
-
-
Total
3.0 (155)
3.1 (167)
3.1 (174)
3.9 (177)
1.8%
26.7%
a 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 Maryland
needs for the
2004-2012 CWNS
by category
(January 2012
dollars in millions).

C
o
<0
h-
(U
o
o
2004
CZI2008
LZI2012
Needs Category

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