Wyoming

fcS£J Clean Watersheds Needs Survey 2008

The Clean Watersheds Needs
Survey (CWNS) is a comprehensive
assessment of needs1 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). Wyoming documented
needs totaling $316 million in 2008.
This is a 3 percent increase from the
$306 million in needs documented in
2004.

ty Needs 16

Documented Needs in Wyoming

Needs (2008 Dollars, Millions)

Type of Need

2004

2008

Percent Change

Wastewater treatment

$126

$48

-62%

Pipe repair and new pipes

$96

$70

-27%

Recycled water distribution

nra

$1

n/a

Combined sewer overflow correction

$0

$0

0%

Total Wastewater Treatment Needs

$222

$119

-46%

Conveyance infrastructure

n/a

$33

n/a

Treatment systems

n/a

$4

n/a

Green infrastmcture

n/a

nr

n/a

General stormwater management

$1

nr

-100%

Total Stormwater Management Needsb

$1

$37

>1,000%

Agriculture (cropland) best management practices (BMPs)

$4

$5

25%

Agriculture (animals) BMPs

nr

nr

0%

Silviculture (forestry) BMPs

nr

nr

0%

Ground water protection: unknown source BMPs

nr

$15

n/a

Marinas BMPs

nr

nr

0%

Resource extraction BMPs

nr

nr

0%

Brownfields remediation

nr

nr

0%

Storage tank remediation

$44

$13

-70%

Sanitary landfills BMPs

$31

$126

306%

Hydromodification (Water resource restoration and protection)

nr

nr

0%

Other estuary management activities0

n/a

nr

n/a

Total Nonpoint Source Control NeedsM

$79

$160

103%.

Total Decentralized Wastewater Treatment Needsb'd

$4

<$0.5

-94%.

Total Needs

$306

$316

3%

aNot reported; Actual needs may be higher, since documenting these needs is difficult; °In 2004, Other Estuary Management
Needs were reported under Separate State Estimates (SSEs); dNot included in Official Needs in the Report to Congress.

1 Documented needs in the CWNS include the unfunded capital costs of projects as of January 1, 2008 that address a water
quality or a water quality-related public health problem existing as of January 1, 2008, or expected to occur within the next 20
years; and meet the seven CWNS documentation criteria. All needs are in January 2008 dollars.


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Wyoming

Clean Watersheds Needs Survey 2008

Wastewater Treatment Facilities

The enactment of the Clean Water Act (CWA) in 1972 resulted in dramatic improvements in the:

•	Number of wastewater treatment plants.

•	Percentage of the population served by wastewater treatment plants.

•	Quality of effluent treatment from wastewater treatment facilities.

In 2008, 82% of Wyoming residents received centralized wastewater treatment services at the secondary,
advanced, or no discharge treatment level, compared to 15% in 1972.

Number of Centralized Treatment Facilities and Population Served

Number of Facilities

Population Served
%Total	%Total

Population	Population

Treatment Level

1972

2008

Projected"

1972

1972

2008

2008

Projected3

Less than Secondary

22

0

0

205,000

55

0

0

0

Secondary

4

72

73

36,000

10

339,376

64

376,795

Advanced

4

8

11

19,000

5

75,356

14

129,283

No Discharge

0

17

17

0

0

15,993

3

16,613

Total

30

97

101

260,000

70

430,725

82

522,691

a Number of facilities and population served if all needs documented in the CWNS 2008 are met.

Small Communities

In Wyoming, small community
wastewater facilities serve 21% of the
population and comprise 60% of total
wastewater treatment and collection
needs. EPA small community support
information is available at:
www. epa. gov/owm/mab/smcomm

Reported Needs for Facilities in Small Communities

Facilities



1 Needs (2008 Dollars, Millions)

Population

2004

2008

2004

2008

0-999

44

32

$36

$16

1,000-3,499

21

23

$36

$28

3,500-10,000

9

6

$39

$26

Total

74

61

$111

$71

Visit www.epa.gov/cwns for more information including:

•	Detailed Reports to Congress

•	Other state fact sheets

•	Maps, charts, and data downloads for projects, facilities, watersheds, counties, congressional
districts, cities, states, and regions


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