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- Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
- Causes of Impairment for 303(d) Listed Waters
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these cycles:
2004
2006
2008
2010
Waterbody Changes from Prior Cycle
For More Information:
New Hampshire Assessment Report
State Water Quality Program
New Hampshire Impaired Waters and TMDL Information
Assessed Waters of New Hampshire by Watershed
Search for a waterbody within New Hampshire
NOTE: In New Hampshire, all surface waters are listed as impaired for fish/shellfish consumption due to a statewide fish consumption advisory that is in effect because of elevated mercury levels in fish tissue. Excluding the statewide mercury fish/shellfish consumption advisory, the number of impaired waters is significantly less.
NOTE: In New Hampshire, all surface waters are listed as impaired for fish/shellfish consumption due to a statewide fish consumption advisory that is in effect because of elevated mercury levels in fish tissue. Excluding the statewide mercury fish/shellfish consumption advisory, the number of impaired waters is significantly less.
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New Hampshire Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
No previously 303(d)-listed waters reported as now attaining all applicable water quality standards.
New Hampshire 2002 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 |
|---|---|
| Mercury |  5,001 |
| pH/Acidity/Caustic Conditions | 241 |
| Pathogens | 183 |
| Polychlorinated Biphenyls (PCBs) | 103 |
| Dioxins | 65 |
| Metals (other than Mercury) | 28 |
| Organic Enrichment/Oxygen Depletion | 27 |
| Pesticides | 22 |
| Algal Growth | 8 |
| Cause Unknown - Impaired Biota | 1 |
Total: 5,679 Causes of Impairment
New Hampshire 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 |
|---|---|---|
| Mercury |  5,124 |
5,124 |
| Escherichia Coli (E. Coli) | 380 |
380 |
| pH | 372 |
372 |
| Fecal Coliform | 48 |
48 |
| Enterococcus Bacteria | 39 |
39 |
| Phosphorus, Total | 29 |
69 |
| Chloride | 4 |
4 |
| pH, Low | 3 |
6 |
| Carbonaceous Bod | 2 |
2 |
| NH3-N | 2 |
2 |
| Biochemical Oxygen Demand (BOD) | 1 |
2 |
| Iron | 1 |
1 |
| NH3 | 1 |
2 |
Total: 6,006 TMDLs; 6,051 Causes of Impairment Addressed
New Hampshire 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 |
|---|---|---|
| 2000 | 5 |
8 |
| 2001 | 3 |
3 |
| 2002 | 1 |
1 |
| 2003 | 2 |
2 |
| 2004 | 53 |
53 |
| 2005 | 20 |
20 |
| 2006 | 23 |
26 |
| 2007 | 160 |
160 |
| 2008 | 5,238 |
5,238 |
| 2009 | 4 |
4 |
| 2010 | 403 |
403 |
| 2011 | 91 |
130 |
| 2012 | 3 |
3 |
Total: 6,006 TMDLs; 6,051 Causes of Impairment Addressed