Missouri Impaired Waters and TMDL Information

Assessed Waters of Missouri by Watershed

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Search for a waterbody within Missouri

Year Attaining	Number of Waters Attaining	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of Waters Attaining" value for a detailed list of those previously 303(d)-listed waters now attaining all applicable water quality standards.
2009	18	28
2010	6	6
2012	39	55

Cause of Impairment Group Name	Number of Causes of Impairment Reported
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.
Organic Enrichment/Oxygen Depletion	82
Pathogens	79
Metals (other than Mercury)	56
Nutrients	34
Mercury	32
Algal Growth	24
Salinity/Total Dissolved Solids/Chlorides/Sulfates	14
Cause Unknown	10
Ammonia	6
Sediment	6
Temperature	3
Taste, Color and Odor	2
pH/Acidity/Caustic Conditions	2
Other Cause	1
Pesticides	1

Total: 352 Causes of Impairment

This chart includes TMDLs since October 1, 1995.

Pollutant	Number of TMDLs	Number of Causes of Impairment Addressed
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.
Sediment	26	26
Total Suspended Solids (TSS)	21	29
Nitrogen, Total	20	24
Phosphorus, Total	19	23
Zinc	19	22
Biochemical Oxygen Demand (BOD)	16	17
Dissolved Oxygen	15	21
Lead	15	19
Nutrients	15	15
Chlordane in Fish Tissue	14	14
Sulfate	11	11
pH	10	10
Inorganic Sediment	8	12
Carbonaceous Bod	7	11
PCB(s) in Fish Tissue	7	7
Pollutants in Urban Stormwater	6	7
Ammonia	5	5
Bacteria	4	4
Chlorine	4	4
NFR (Non Filterable Residues)	4	4
Suspended Sediment/Siltation	4	4
Temperature	4	4
Volatile Solids	4	4
Cadmium	3	3
Fecal Coliform	3	3
Lead in Sediment	3	3
Nitrogenous BOD	3	5
Cause Unknown	2	2
Escherichia Coli (E. Coli)	2	2
Nickel	2	2
Organic Sediment	2	6
Algae	1	1
Atrazine	1	1
Chemical Biological Oxygen Demand 5 Day Average	1	1
Heavy Metals	1	1
Iron	1	1
NH3-N	1	1
Nitrogen	1	1
Nutrients - Algae	1	1
Phosphorus	1	1
Zinc in Sediment	1	1

Total: 288 TMDLs; 333 Causes of Impairment Addressed

EPA Fiscal Year starts October 1 and ends September 30.

Fiscal Year	Number of TMDLs	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.
2000	10	10
2001	17	17
2002	12	12
2003	1	1
2004	26	26
2005	6	6
2006	20	20
2007	36	36
2008	8	8
2009	1	1
2010	60	70
2011	91	126

Total: 288 TMDLs; 333 Causes of Impairment Addressed