![[logo] US EPA](http://www.epa.gov/epafiles/images/logo_epaseal.gif){kind=logo}
Return to home page
On This Page
On This Page
- 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:
2002
2004
2010
Waterbody Changes from Prior Cycle
For More Information:
Maryland Impaired Waters and TMDL Information
Assessed Waters of Maryland by Watershed
Search for a waterbody within Maryland
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Maryland 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.
Maryland 2006 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 |
|---|---|
| Cause Unknown - Impaired Biota |  371 |
| Sediment | 90 |
| Nutrients | 83 |
| Pathogens | 49 |
| Total Toxics | 29 |
| Mercury | 13 |
| pH/Acidity/Caustic Conditions | 9 |
| Trash | 2 |
Total: 646 Causes of Impairment
Maryland 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 |
|---|---|---|
| Iron |  80 |
80 |
| Aluminum | 79 |
79 |
| Sulfate | 77 |
78 |
| Ammonium | 76 |
76 |
| Nitrate | 76 |
77 |
| Total Suspended Solids (TSS) | 62 |
62 |
| Fecal Coliform | 61 |
63 |
| Nitrogen, Total | 51 |
51 |
| Phosphorus, Total | 51 |
51 |
| Phosphorus | 41 |
41 |
| Nitrogen | 24 |
24 |
| Escherichia Coli (E. Coli) | 20 |
20 |
| Sediment | 14 |
14 |
| Polychlorinated Biphenyls (PCBs) | 13 |
14 |
| Suspended Sediment | 12 |
12 |
| Biochemical Oxygen Demand (BOD) | 6 |
6 |
| Methyl Mercury | 5 |
5 |
| Carbonaceous Bod | 3 |
3 |
| Chlordane | 3 |
3 |
| Mercury | 3 |
3 |
| Enterococcus Bacteria | 2 |
2 |
| Trash | 2 |
2 |
| Ammonia | 1 |
1 |
| Bacteria | 1 |
1 |
| NOD (Nitrogen Oxygen Demand) | 1 |
1 |
| Nutrients | 1 |
1 |
| Pathogens | 1 |
1 |
| pH | 1 |
1 |
Total: 767 TMDLs; 772 Causes of Impairment Addressed
Maryland 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 |
|---|---|---|
| 1999 | 4 |
4 |
| 2000 | 10 |
10 |
| 2001 | 17 |
17 |
| 2002 | 25 |
25 |
| 2003 | 7 |
7 |
| 2004 | 7 |
7 |
| 2005 | 29 |
29 |
| 2006 | 26 |
28 |
| 2007 | 143 |
144 |
| 2008 | 284 |
285 |
| 2009 | 14 |
14 |
| 2010 | 14 |
14 |
| 2011 | 181 |
181 |
| 2012 | 2 |
2 |
| 2013 | 4 |
5 |
Total: 767 TMDLs; 772 Causes of Impairment Addressed