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- N. Mariana Islands Assessment Summary
- Water Quality by Waterbody Type
- Causes of Impairment
- Probable Sources Contributing to Impairments
- Previously Impaired Waters Now Attaining All Uses
- TMDL Alternatives by Cause of Impairment
- Causes of Impairment for 303(d) Listed Waters
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these years: 2002 2004 2006
Waterbody Changes from Prior Cycle
Comparison Summary by Reporting Year
For More Information:
N. Mariana Islands 2008 Water Quality Assessment Report
Assessed Waters of N. Mariana Islands by Watershed
Search for a Waterbody within N. Mariana Islands
N. Mariana Islands Assessment Summary for Reporting Year 2008
Description of this table
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008
N. Mariana Islands Assessed Waters
Summary of Water Quality Attainment for Coastal Shoreline
Reporting Year 2008
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N. Mariana Islands Assessed Waters
Designated Use Support for Coastal Shoreline
Reporting Year 2008*
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this table| Designated Use | Miles Assessed | Percent Good | Percent Threatened | Percent Impaired |  % Good |
|---|---|---|---|---|---|
 % Threatened |
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 % Impaired |
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| Aquatic Life Use | .9 | 21.2 | .0 | 78.8 | |
| Recreational Use | .8 | 24.1 | .0 | 75.9 | |
N. Mariana Islands Causes of Impairment
for Threatened and Impaired Coastal Shoreline
Reporting Year 2008
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Enterococcus Bacteria | Pathogens | .6 |
| Phosphate | Nutrients | .6 |
| Biological Criteria | Cause Unknown - Impaired Biota | .3 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | .3 |
N. Mariana Islands Probable Sources of Impairments
for Threatened and Impaired Coastal Shoreline
Reporting Year 2008
No probable sources of impairments reported.
N. Mariana Islands Causes of Impairment for Reporting Year 2008
Description of this table
| NOTE: Click on the underlined Cause of Impairment Group to see a list of specific state causes of impairment making up the Cause of Impairment Group. | |||||||||||||||
| Cause of Impairment Group | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Coastal Shoreline (Miles) |
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| Cause Unknown - Impaired Biota | .3 | ||||||||||||||
| Nutrients | .6 | ||||||||||||||
| Organic Enrichment/Oxygen Depletion | .3 | ||||||||||||||
| Pathogens | .6 | ||||||||||||||
N. Mariana Islands Probable Sources Contributing to Impairments
for Reporting Year 2008
No probable sources reported.
N. Mariana Islands TMDL Alternatives by Cause of Impairment 2008
No TMDL Alternatives reported.
N. Mariana Islands Previously Impaired Waters Now Attaining All Uses
No previously impaired waters reported as attaining all uses.
N. Mariana Islands Causes of Impairment for 303(d) Listed Waters
Description of this table| NOTE: Click on a cause of impairment (e.g. pathogens) to see the specific state-reported causes that are grouped to make up this category. Click on the "Number of Causes of Impairment Reported" to see a list of waters with that cause of impairment. | |
| Cause of Impairment Group Name | Number of Causes of Impairment Reported |
|---|---|
| Pathogens | 63 |
| Nutrients | 61 |
| Cause Unknown - Impaired Biota | 33 |
| Organic Enrichment/Oxygen Depletion | 32 |
Total: 189 Causes of Impairment
N. Mariana Islands Cumulative TMDLs by Pollutant
This chart includes TMDLs since October 1, 1995.
Description of this table| NOTE: Click on the underlined "Pollutant" value to see associated listed waters for which a TMDL was developed. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant. | ||
| Pollutant | Number of TMDLs | Number of Causes of Impairment Addressed |
|---|---|---|
Total: 0 TMDLs; Causes of Impairment Addressed
N. Mariana Islands Cumulative Number of TMDLs
EPA Fiscal Year starts October 1 and ends September 30.
Description of this table
| NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year. | ||
| Fiscal Year | Number of TMDLs | Number of Causes of Impairment Addressed |
|---|---|---|
Total: 0 TMDLs; Causes of Impairment Addressed