2004 Section 303(d) List Fact Sheet for MARYLAND

Water Assessment Information
2004 State Assessment Report

Other Impaired Water 303(d) List Information
The most current report available is 2006
Data are also available for these years: 2002 1998

Click here to see metadata for this report.

Waterbody Type	Number of Waters on List
NOTE: Click on the underlined "Number of Waters on List" value to see a listing of those waters.
STREAM/CREEK/RIVER	388
CREEK	38
LAKE/RESERVOIR/POND	20
BAY/ESTUARY	15
BAY	4
SOUND	4
HARBOR	3
WETLAND	1

Total Number of Impaired Waters Reported: 473

Watershed Name	Number of Waters on List	Percent of Reported
NOTE: Click on the underlined "Watershed Name" to view a Watershed report. Click on the underlined "Number of Waters on List" value to see a listing of those waters.
Blackwater-Wicomico	12	2.54
Brandywine-Christina	1	.21
Cacapon-Town	8	1.69
Chester-Sassafras	32	6.77
Chincoteague	6	1.27
Choptank	7	1.48
Conococheague-Opequon	8	1.69
Gunpowder-Patapsco	43	9.09
Lower Potomac	24	5.07
Lower Susquehanna	8	1.69
Middle Potomac-Anacostia-Occoquan	10	2.11
Middle Potomac-Catoctin	12	2.54
Monocacy	6	1.27
Nanticoke	3	.63
North Branch Potomac	15	3.17
Not Reported	209	44.19
Patuxent	23	4.86
Pocomoke	13	2.75
Severn	19	4.02
Youghiogheny	17	3.59

Total Number of Impaired Waters Reported: 473

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General Impairment Name	Cause of Impairment Reported	Percent of Reported
NOTE: Click on the underlined "Cause of Impairment Reported" value to see a listing of those waters with that cause of impairment. Click on the underlined "General Impairment Name" to see the detailed state-reported impairment names.
CAUSE UNKNOWN - IMPAIRED BIOTA	288	43.84
PATHOGENS	108	16.44
NUTRIENTS	93	14.16
SEDIMENT	91	13.85
METALS (OTHER THAN MERCURY)	40	6.09
PCBS	16	2.44
PH	10	1.52
MERCURY	3	.46
PESTICIDES	2	.30
ORGANIC ENRICHMENT/OXYGEN DEPLETION	2	.30
TOXIC INORGANICS	1	.15
SALINITY/TDS/SULFATES/CHLORIDES	1	.15
TURBIDITY	1	.15
TOTAL TOXICITY	1	.15

Total Number of Causes of Impairment Reported: 657

Priority	Cause of Impairment Reported	Percent of Reported
NOTE: Click on the underlined "Cause of Impairment Reported" value to see a listing of those waters with that impairment priority.
LOW	480	73.06
MEDIUM	80	12.18
HIGH	71	10.81
NOT REPORTED	26	3.96

Total Number of Causes of Impairment Reported: 657

Pollutant	Number of TMDLs Approved	Percent of Reported
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 Approved" value to see a listing of those approved TMDLs for the pollutant. EPA is in the process of collecting TMDL information from the states. Because these efforts are on-going, there may be additional approved TMDLs that were not included in the listings below.
ALUMINUM	78	12.83
IRON	78	12.83
SULFATE	77	12.66
NITRATE	77	12.66
AMMONIUM	76	12.50
FECAL COLIFORM	67	11.02
PHOSPHORUS	41	6.74
NITROGEN	31	5.10
SUSPENDED SEDIMENT	19	3.13
SEDIMENT	12	1.97
E. COLI	12	1.97
BIOLOGICAL	5	.82
CBOD	5	.82
BOD	4	.66
METHYL MERCURY	4	.66
MERCURY	3	.49
CHLORDANE	3	.49
PCBS	3	.49
LEAD	2	.33
SULFATES	1	.16
AMMONIA	1	.16
PH	1	.16
DISSOLVED OXYGEN	1	.16
AMMONIUM	1	.16
PATHOGENS	1	.16
NOD (NITROGEN OXYGEN DEMAND)	1	.16
HEPTACHLOR	1	.16
BACTERIA	1	.16
CADMIUM	1	.16
NUTRIENTS	1	.16

Total Number of TMDLs Reported to EPA since October 1, 1995: 608

TMDL Document Search

Full Text Search of TMDL Documents is available here.

The following agencies may also have relevant environmental information:

U. S. Geological Survey Data
Maryland Department of the Environment - Introduction to Maryland's TMDL Program