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 I 1 I I I
>$25B S5-S25B $2.5-$5B $1-S2.5B
~
Did not participate
Montana
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.
Management
Category Ml
Category
Percent
I Secondary Wastewater Treatment
Advanced Wastewater Treatment
Conveyance System Repair
iV New Conveyance Systems
V Combined Sewer Overflow Correction
VI Stormwater Management Program
X Recycled Water Distribution
Category I
Secondary Wastewater Treatment
$130M, 35.8%
CWNS 2012 Montana documented needs by category
(January 2012 dollars in millions).
Conveyance System Repair
$68M, 18.7%
Category VI
Stormwater
Program
$18M, 5.0%
Category IV
New Conveyance
Systems
$50M, 13.8%
Category II
Advanced
Wastewater
Treatment
$96M, 26.4%
Improvements in treatment level of Montana'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
2012
2032
Less than Secondary8
-(0)
-(0)
-(0)
-(0)
-
-
Secondary
0.4 (108)
0.4 (73)
0,4 (88)
0.3 (71)
2.5%
-7.6%
Greater than Secondary
<0.1(6)
0.1 (8)
0,1 (8)
0.4 (18)
-0.5%
252.4%
No Discharge
<0.1(83)
<0.1(31)
<0.1 (65)
< 0.1 (79)
30.3%
84.6%
Partial Treatment
-(2)
"(2)
-d)
-d)
-
-
Total
0.5 (199)
0.5 (114)
0.5 (162)
0.8 (169)
4.0%
51.9%
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 Montana
needs for the
2004-2012 CWNS
by category
(January 2012
dollars in millions).
(f)
C
o
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