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Sewage treatment plant, major discharger, Fort Knox, Kentucky. NPDES permit KY0112721, in force until Sep 30, 2030. Last 12 months: over a limit once (last June 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Toxicity, Chronic, daily maximum | 1.35 tox chronic | ≤ 1 tox chronic | 35% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | average | report only (deg C) | May–Oct | 001 |
| Temperature, water deg. centigrade | average | report only (deg C) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | May–Oct | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | all year | 001 |
| pH | minimum | ≥ 6 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly average | ≤ 1501 lb/d | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 2252 lb/d | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year | 001 |
| Oil & Grease | average | report only (mg/L) | all year | 001 |
| Oil & Grease | maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 2 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 100 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 250 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 150 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 375 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | average | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | maximum | report only (ug/L) | all year | 001 |
| Hardness, total [as CaCO3] | average | report only (mg/L) | all year | 001 |
| Hardness, total [as CaCO3] | maximum | report only (mg/L) | all year | 001 |
| Arsenic, total recoverable | average | report only (ug/L) | all year | 001 |
| Arsenic, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | average | report only (ug/L) | all year | 001 |
| Selenium, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Thallium, total recoverable | average | report only (ug/L) | all year | 001 |
| Thallium, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Beryllium, total recoverable [as Be] | average | report only (ug/L) | all year | 001 |
| Beryllium, total recoverable [as Be] | maximum | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | average | report only (ug/L) | all year | 001 |
| Nickel, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Silver total recoverable | average | report only (ug/L) | all year | 001 |
| Silver total recoverable | maximum | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | average | report only (ug/L) | all year | 001 |
| Zinc, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | average | report only (ug/L) | all year | 001 |
| Cadmium, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Lead, total recoverable | average | report only (ug/L) | all year | 001 |
| Lead, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | average | report only (ug/L) | all year | 001 |
| Chromium, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Copper, total recoverable | average | report only (ug/L) | all year | 001 |
| Copper, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Antimony, total recoverable | average | report only (ug/L) | all year | 001 |
| Antimony, total recoverable | maximum | report only (ug/L) | all year | 001 |
| Dichlorobromomethane | average | report only (ug/L) | all year | 001 |
| Dichlorobromomethane | maximum | report only (ug/L) | all year | 001 |
| Carbon tetrachloride | average | report only (ug/L) | all year | 001 |
| Carbon tetrachloride | maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloroethane | average | report only (ug/L) | all year | 001 |
| 1,2-Dichloroethane | maximum | report only (ug/L) | all year | 001 |
| Bromoform | average | report only (ug/L) | all year | 001 |
| Bromoform | maximum | report only (ug/L) | all year | 001 |
| Chloroform | average | report only (ug/L) | all year | 001 |
| Chloroform | maximum | report only (ug/L) | all year | 001 |
| Toluene | average | report only (ug/L) | all year | 001 |
| Toluene | maximum | report only (ug/L) | all year | 001 |
| Benzene | average | report only (ug/L) | all year | 001 |
| Benzene | maximum | report only (ug/L) | all year | 001 |
| Acenaphthylene | average | report only (ug/L) | all year | 001 |
| Acenaphthylene | maximum | report only (ug/L) | all year | 001 |
| Acenaphthene | average | report only (ug/L) | all year | 001 |
| Acenaphthene | maximum | report only (ug/L) | all year | 001 |
| Acrolein | average | report only (ug/L) | all year | 001 |
| Acrolein | maximum | report only (ug/L) | all year | 001 |
| Acrylonitrile | average | report only (ug/L) | all year | 001 |
| Acrylonitrile | maximum | report only (ug/L) | all year | 001 |
| Anthracene | average | report only (ug/L) | all year | 001 |
| Anthracene | maximum | report only (ug/L) | all year | 001 |
| Benzo[k]fluoranthene | average | report only (ug/L) | all year | 001 |
| Benzo[k]fluoranthene | maximum | report only (ug/L) | all year | 001 |
| Benzo[a]pyrene | average | report only (ug/L) | all year | 001 |
| Benzo[a]pyrene | maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroethyl] ether | average | report only (ug/L) | all year | 001 |
| Bis[2-chloroethyl] ether | maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroethoxy]methane | average | report only (ug/L) | all year | 001 |
| Bis[2-chloroethoxy]methane | maximum | report only (ug/L) | all year | 001 |
| Bis[2-chloroisopropyl] ether | average | report only (ug/L) | all year | 001 |
| Bis[2-chloroisopropyl] ether | maximum | report only (ug/L) | all year | 001 |
| Butyl benzyl phthalate | average | report only (ug/L) | all year | 001 |
| Butyl benzyl phthalate | maximum | report only (ug/L) | all year | 001 |
| Chlorobenzene | average | report only (ug/L) | all year | 001 |
| Chlorobenzene | maximum | report only (ug/L) | all year | 001 |
| Chlorodibromomethane | average | report only (ug/L) | all year | 001 |
| Chlorodibromomethane | maximum | report only (ug/L) | all year | 001 |
| Chrysene | average | report only (ug/L) | all year | 001 |
| Chrysene | maximum | report only (ug/L) | all year | 001 |
| Diethyl phthalate | average | report only (ug/L) | all year | 001 |
| Diethyl phthalate | maximum | report only (ug/L) | all year | 001 |
| Dimethyl phthalate | average | report only (ug/L) | all year | 001 |
| Dimethyl phthalate | maximum | report only (ug/L) | all year | 001 |
| 1,2-Diphenylhydrazine | average | report only (ug/L) | all year | 001 |
| 1,2-Diphenylhydrazine | maximum | report only (ug/L) | all year | 001 |
| Ethylbenzene | average | report only (ug/L) | all year | 001 |
| Ethylbenzene | maximum | report only (ug/L) | all year | 001 |
| Fluoranthene | average | report only (ug/L) | all year | 001 |
| Fluoranthene | maximum | report only (ug/L) | all year | 001 |
| Fluorene | average | report only (ug/L) | all year | 001 |
| Fluorene | maximum | report only (ug/L) | all year | 001 |
| Hexachlorocyclopentadiene | average | report only (ug/L) | all year | 001 |
| Hexachlorocyclopentadiene | maximum | report only (ug/L) | all year | 001 |
| Hexachloroethane | average | report only (ug/L) | all year | 001 |
| Hexachloroethane | maximum | report only (ug/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | average | report only (ug/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | maximum | report only (ug/L) | all year | 001 |
| Isophorone | average | report only (ug/L) | all year | 001 |
| Isophorone | maximum | report only (ug/L) | all year | 001 |
| Methyl bromide [Bromomethane] | average | report only (ug/L) | all year | 001 |
| Methyl bromide [Bromomethane] | maximum | report only (ug/L) | all year | 001 |
| Methyl chloride [Chloromethane] | average | report only (ug/L) | all year | 001 |
| Methyl chloride [Chloromethane] | maximum | report only (ug/L) | all year | 001 |
| Methylene chloride | average | report only (ug/L) | all year | 001 |
| Methylene chloride | maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodi-N-propylamine | average | report only (ug/L) | all year | 001 |
| N-Nitrosodi-N-propylamine | maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodiphenylamine | average | report only (ug/L) | all year | 001 |
| N-Nitrosodiphenylamine | maximum | report only (ug/L) | all year | 001 |
| N-Nitrosodimethylamine [NDMA] | average | report only (ug/L) | all year | 001 |
| N-Nitrosodimethylamine [NDMA] | maximum | report only (ug/L) | all year | 001 |
| Nitrobenzene | average | report only (ug/L) | all year | 001 |
| Nitrobenzene | maximum | report only (ug/L) | all year | 001 |
| Phenanthrene | average | report only (ug/L) | all year | 001 |
| Phenanthrene | maximum | report only (ug/L) | all year | 001 |
| Pyrene | average | report only (ug/L) | all year | 001 |
| Pyrene | maximum | report only (ug/L) | all year | 001 |
| Tetrachloroethylene | average | report only (ug/L) | all year | 001 |
| Tetrachloroethylene | maximum | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethane | average | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethane | maximum | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethylene | average | report only (ug/L) | all year | 001 |
| 1,1-Dichloroethylene | maximum | report only (ug/L) | all year | 001 |
| 1,1,1-Trichloroethane | average | report only (ug/L) | all year | 001 |
| 1,1,1-Trichloroethane | maximum | report only (ug/L) | all year | 001 |
| 1,1,2-Trichloroethane | average | report only (ug/L) | all year | 001 |
| 1,1,2-Trichloroethane | maximum | report only (ug/L) | all year | 001 |
| 1,1,2,2-Tetrachloroethane | average | report only (mg/L) | all year | 001 |
| 1,1,2,2-Tetrachloroethane | maximum | report only (mg/L) | all year | 001 |
| Benzo[ghi]perylene | average | report only (ug/L) | all year | 001 |
| Benzo[ghi]perylene | maximum | report only (ug/L) | all year | 001 |
| Benzo[a]anthracene | average | report only (ug/L) | all year | 001 |
| Benzo[a]anthracene | maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichlorobenzene | average | report only (ug/L) | all year | 001 |
| 1,2-Dichlorobenzene | maximum | report only (ug/L) | all year | 001 |
| 1,2-Dichloropropane | average | report only (ug/L) | all year | 001 |
| 1,2-Dichloropropane | maximum | report only (ug/L) | all year | 001 |
| trans-1,2-Dichloroethylene | average | report only (ug/L) | all year | 001 |
| trans-1,2-Dichloroethylene | maximum | report only (ug/L) | all year | 001 |
| 1,2,4-Trichlorobenzene | average | report only (ug/L) | all year | 001 |
| 1,2,4-Trichlorobenzene | maximum | report only (ug/L) | all year | 001 |
| Dibenz[a,h]anthracene | average | report only (ug/L) | all year | 001 |
| Dibenz[a,h]anthracene | maximum | report only (ug/L) | all year | 001 |
| 1,3-Dichlorobenzene | average | report only (ug/L) | all year | 001 |
| 1,3-Dichlorobenzene | maximum | report only (ug/L) | all year | 001 |
| 1,4-Dichlorobenzene | average | report only (ug/L) | all year | 001 |
| 1,4-Dichlorobenzene | maximum | report only (ug/L) | all year | 001 |
| 2-Chloroethyl vinyl ether, [mixed] | average | report only (ug/L) | all year | 001 |
| 2-Chloroethyl vinyl ether, [mixed] | maximum | report only (ug/L) | all year | 001 |
| 2-Chloronaphthalene | average | report only (ug/L) | all year | 001 |
| 2-Chloronaphthalene | maximum | report only (ug/L) | all year | 001 |
| 2-Chlorophenol | average | report only (ug/L) | all year | 001 |
| 2-Chlorophenol | maximum | report only (ug/L) | all year | 001 |
| 2-Nitrophenol | average | report only (ug/L) | all year | 001 |
| 2-Nitrophenol | maximum | report only (ug/L) | all year | 001 |
| 2,4-Dichlorophenol | average | report only (ug/L) | all year | 001 |
| 2,4-Dichlorophenol | maximum | report only (ug/L) | all year | 001 |
| 2,4-Dimethylphenol | average | report only (ug/L) | all year | 001 |
| 2,4-Dimethylphenol | maximum | report only (ug/L) | all year | 001 |
| 2,4-Dinitrotoluene | average | report only (ug/L) | all year | 001 |
| 2,4-Dinitrotoluene | maximum | report only (ug/L) | all year | 001 |
| 2,4-Dinitrophenol | average | report only (ug/L) | all year | 001 |
| 2,4-Dinitrophenol | maximum | report only (ug/L) | all year | 001 |
| 2,4,6-Trichlorophenol | average | report only (ug/L) | all year | 001 |
| 2,4,6-Trichlorophenol | maximum | report only (ug/L) | all year | 001 |
| 2,6-Dinitrotoluene | average | report only (ug/L) | all year | 001 |
| 2,6-Dinitrotoluene | maximum | report only (ug/L) | all year | 001 |
| 3,3'-Dichlorobenzidine | average | report only (ug/L) | all year | 001 |
| 3,3'-Dichlorobenzidine | maximum | report only (ug/L) | all year | 001 |
| 4-Bromophenyl phenyl ether | average | report only (ug/L) | all year | 001 |
| 4-Bromophenyl phenyl ether | maximum | report only (ug/L) | all year | 001 |
| 4-Chlorophenyl phenyl ether | average | report only (ug/L) | all year | 001 |
| 4-Chlorophenyl phenyl ether | maximum | report only (ug/L) | all year | 001 |
| 4-Nitrophenol | average | report only (ug/L) | all year | 001 |
| 4-Nitrophenol | maximum | report only (ug/L) | all year | 001 |
| 4,6-Dinitro-o-cresol | average | report only (ug/L) | all year | 001 |
| 4,6-Dinitro-o-cresol | maximum | report only (ug/L) | all year | 001 |
| Phenol | average | report only (ug/L) | all year | 001 |
| Phenol | maximum | report only (ug/L) | all year | 001 |
| Naphthalene | average | report only (ug/L) | all year | 001 |
| Naphthalene | maximum | report only (ug/L) | all year | 001 |
| Pentachlorophenol | average | report only (ug/L) | all year | 001 |
| Pentachlorophenol | maximum | report only (ug/L) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | average | report only (ug/L) | all year | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | maximum | report only (ug/L) | all year | 001 |
| Di-n-butyl phthalate | average | report only (ug/L) | all year | 001 |
| Di-n-butyl phthalate | maximum | report only (ug/L) | all year | 001 |
| Benzidine | average | report only (ug/L) | all year | 001 |
| Benzidine | maximum | report only (ug/L) | all year | 001 |
| Vinyl chloride | average | report only (ug/L) | all year | 001 |
| Vinyl chloride | maximum | report only (ug/L) | all year | 001 |
| Trichloroethylene | average | report only (ug/L) | all year | 001 |
| Trichloroethylene | maximum | report only (ug/L) | all year | 001 |
| Hexachlorobenzene | average | report only (ug/L) | all year | 001 |
| Hexachlorobenzene | maximum | report only (ug/L) | all year | 001 |
| Hexachlorobutadiene | average | report only (ug/L) | all year | 001 |
| Hexachlorobutadiene | maximum | report only (ug/L) | all year | 001 |
| Chloride | average | report only (ug/L) | all year | 001 |
| Chloride | maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 130 #/100mL | all year | 001 |
| E. coli | 7-day geometric mean | ≤ 240 #/100mL | all year | 001 |
| 1,3-Dichloropropylene | average | report only (ug/L) | all year | 001 |
| 1,3-Dichloropropylene | maximum | report only (ug/L) | all year | 001 |
| Nitrogen, Kjeldahl Total | average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl Total | maximum | report only (mg/L) | all year | 001 |
| Nitrite Plus Nitrate Total | average | report only (mg/L) | all year | 001 |
| Nitrite Plus Nitrate Total | maximum | report only (mg/L) | all year | 001 |
| Phenolic compounds, total | average | report only (mg/L) | all year | 001 |
| Phenolic compounds, total | maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved [TDS] | average | report only (mg/L) | all year | 001 |
| Solids, total dissolved [TDS] | maximum | report only (mg/L) | all year | 001 |
| Mercury, total recoverable | average | report only (mg/L) | all year | 001 |
| Mercury, total recoverable | maximum | report only (mg/L) | all year | 001 |
| 3,4-Benzofluoranthene | average | report only (ug/L) | all year | 001 |
| 3,4-Benzofluoranthene | maximum | report only (ug/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 15 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | ≤ 22.5 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | ≤ 751 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | daily maximum | ≤ 1125 lb/d | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | monthly average | report only (mg/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum weekly average | report only (mg/L) | all year | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| p-Chloro-m-cresol | average | report only (ug/L) | all year | 001 |
| p-Chloro-m-cresol | maximum | report only (ug/L) | all year | 001 |
| Chloroethane | average | report only (ug/L) | all year | 001 |
| Chloroethane | maximum | report only (ug/L) | all year | 001 |
| Toxicity, Chronic | daily maximum | ≤ 1 tox chronic | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | all year | 001B |
| BOD, 5-day, 20 deg. C | daily maximum | ≤ 45 mg/L | all year | 001B |
| pH | minimum | ≥ 6 SU | all year | 001B |
| pH | daily maximum | ≤ 9 SU | all year | 001B |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001B |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year | 001B |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001B |
Cited limits by parameter: Kentucky's rules and the federal ones.
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