Clean Watersheds Needs Survey 2012
Distribution of total official needs by State
(January 2012 dollars in billions)
Total documented needs = $271.0 Billion
Range HH 1 1 1 1 I 1 1 I I 1
>$25B $5-$25B $2.5-$5B $1-$2.5B <$1B Did not participate
Idaho
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 I
Secondary Wastewater Treatment
$420M, 30.5%
Category X
Recycled Water
Distribution
<$0,5M, <1%
Category VI
Stormwater
Management
Program
$22M, 1.6%
Category
New Conveyance
Systems
$180M, 13.1%
CWNS 2012 Idaho documented needs by category
(January 2012 dollars in millions).
Category II
Advanced
Wastewater
Treatment
$612M, 44.4%
Category III
Conveyance System Repair
$145M, 10.5%
Category
$M
Percent
1 Secondary Wastewater Treatment
420
30.5
!! Advanced Wastewater Treatment
612
44.4
III Conveyance System Repair
145
10.5
IV New Conveyance Systems
180
13.1
V Combined Sewer Overflow Correction
nr
nr
VI Stormwater Management Program
22
1.6
X Recycled Water Distribution
<0.5
<1
Total
1,379
100.0
Improvements in treatment level of Idaho'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 Secondary3
-(0)
-(0)
-(0)
-(0)
-
-
Secondary
0.6(113)
0.5 (98)
0.5 (100)
0.5 (87)
0.1%
3.4%
Greater than Secondary
0.3(7)
0.5(13)
0.6(17)
1.3(31)
11,5%
140.7%
No Discharge
<0.1(59)
<0.1(55)
<0,1 (65)
<0.1 (65)
¦10.2%
73.5%
Partial Treatment
-(3)
-(2)
-(0)
-(0)
-
-
Total
0.9 (182)
1.1 (168)
1.1 (182)
2.0 (183)
4.7%
73.5%
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 Idaho needs
for the 2004-2012
CWNS by category
(January 2012
dollars in millions).

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