Northern Mariana Islands
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). Northern Mariana
Islands documented needs totaling $25
million in 2008. Northern Mariana
Islands did not participate in 2004.
1 Documented Needs in Northern Mariana Islands 1

Needs (2008 Dollars, Millions)
Type of Need
2004 2008 Percent Change
Wastewater treatment
nra
$2
n/a
Pipe repair and new pipes
nr
$19
n/a
Recycled water distribution
nr
nr
n/a
Combined sewer overflow correction
nr
$0
n/a
Total Wastewater Treatment Needs
nr
$21
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
$4
n/a
Other estuary management activities0
nr
nr
n/a
Total Nonpoint Source Control NeedsM
nr
$4
n/a
Total Decentralized Wastewater Treatment Needsb'd
nr
<$0.5
n/a
Total Needs
nr
$25
n/a
aNot reported; Actual needs may be higher, since documenting these needs is difficult; cIn 2004, Other Estuary Management
Needs were reported under Separate State Estimates (SSEs); dNot included in Official Needs in the Report to Congress.
Needs ($M)
| None reported 0
J <20
J 20-30
t
H > 30
•
/

/C?

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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Northern Mariana Islands
k u 4
l^iClean 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 Northern Mariana Islands residents received centralized wastewater treatment services at
the secondary, advanced, or no discharge treatment level, compared to 1% 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
4
0
0
2,000
2
0
0
0
Secondary
1
2
3
0
0
70,000
82
108,533
Advanced
2
0
0
1,000
<1
0
0
0
No Discharge
0
0
0
0
0
0
0
0
| Total
7
2
3

3
70,000
82
108,533|
a Number of facilities and population served if all needs documented in the CWNS 2008 are met.
Small Communities
In Northern Mariana Islands, small
community wastewater facilities serve
17% of the population and comprise
19% 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
Population 2004 2008
Needs (2008 Dollars, Millions)
2004 2008
0-999 nr 0
1,000-3,499 nr 1
3,500-10,000 nr 0
nr $0
nr $4
nr $0
Total nr
nr $4
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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