Guam
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). Guam documented
needs totaling $364 million in 2008.
Guam did not participate in 2004.
1 Documented Needs in Guam 1

Needs (2008 Dollars, Millions)
Type of Need
2004 2008 Percent Change
Wastewater treatment
nra
$129
n/a
Pipe repair and new pipes
nr
$235
n/a
Recycled water distribution
nr
nr
n/a
Combined sewer overflow correction
nr
$0
n/a
Total Wastewater Treatment Needs
nr
$364
n/a
Conveyance infrastructure
nr
nr
n/a
Treatment systems
nr
nr
n/a
Green infrastructure
nr
nr
n/a
General stormwater management
nr
nr
n/a
Total Stormwater Management Needsb
nr
nr
n/a
Agriculture (cropland) best management practices (BMPs)
nr
nr
n/a
Agriculture (animals) BMPs
nr
nr
n/a
Silviculture (forestry) BMPs
nr
nr
n/a
Ground water protection: unknown source BMPs
nr
nr
n/a
Marinas BMPs
nr
nr
n/a
Resource extraction BMPs
nr
nr
n/a
Brownfields remediation
nr
nr
n/a
Storage tank remediation
nr
nr
n/a
Sanitary landfills BMPs
nr
nr
n/a
Hydromodification (Water resource restoration and protection)
nr
nr
n/a
Other estuary management activities0
nr
nr
n/a
Total Nonpoint Source Control Needsb'd
nr
nr
n/a
Total Decentralized Wastewater Treatment Needsb'd
nr
nr
n/a
Total Needs
nr
$364
n/a
aNot reported; Actual needs may be higher, since documenting these needs is difficult; cIn 2004, Other Estuary Management
Needs were reported under Separate State Estimates (SSEs); dNot included in Official Needs in the Report to Congress.

M
Need
Needs (SM)
None reported
<300
300-400
>400
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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Guam
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, 14% of Guam residents received centralized wastewater treatment services at the secondary,
advanced, or no discharge treatment level, compared to 4% 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
2
2
0
61,000
50
145,036
83
0
Secondary
1
1
3
1,000
<1
13,156
8
203,362
Advanced
1
0
0
4,000
3
0
0
0
No Discharge
0
3
3
0
0
10,876
6
12,156
Total
4
6
6
66,000
55
169,068
97
215,518
a Number of facilities and population served if all needs documented in the CWNS 2008 are met.
Small Communities
In Guam, small community wastewater
facilities serve 6% of the population and
comprise 10% 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
nr
0
nr
$0
1,000-3,499
nr
0
nr
$0
3,500-10,000
nr
3
nr
$35
Total
nr
3
nr
$35
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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