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Clean Water Act discharge permit · NPDES KY0021172

BENTON STP, Benton, KY: NPDES KY0021172 discharge permit, effluent exceedances, inspections, penalties

BENTON STP, held by Benton STP, holds NPDES permit KY0021172, which discharges to Clarks River / East Fork. EPA’s file records it issued September 26, 2018 and expiring October 31, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedBENTON STP
Permittee as filedBenton STP
NPDES IDKY0021172
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typePublicly owned treatment works
ProgramPublicly owned treatment works
IssuedSeptember 26, 2018
Expiration dateOctober 31, 2023
AddressBenton, KY 42025
Receiving waterCLARKS RIVER / EAST FORK
SubwatershedLimestone Creek (HUC 051201140501)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant; the 60 with the most exceedances of 123 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Nitrogen, ammonia total [as N]49999June 30, 20262,400% over the limit
Solids, suspended percent removal11717February 28, 2021360% over the limit
Solids, total suspended61515August 31, 2008189% over the limit
BOD, carbonaceous [5 day, 20 C]61212February 28, 2022110% over the limit
BOD, carb-5 day, 20 deg C, percent removal11010January 31, 2024567% over the limit
Chlorine, total residual299June 30, 201910,479% over the limit
Toxicity, final conc toxicity units166June 30, 202499,999% over the limit
E. coli255January 31, 202624,900% over the limit
Coliform, fecal general022December 31, 2011505% over the limit
Oxygen, dissolved [DO]111February 28, 20260% over the limit
Cadmium, total recoverable680
Phosphorus, total [as P]1000
Oil & Grease600
Cyanide, free [amenable to chlorination]600
Arsenic, total recoverable600
Selenium, total recoverable600
Nickel, total recoverable600
Silver total recoverable600
Zinc, total recoverable600
Lead, total recoverable600
Chromium, total recoverable600
Copper, total recoverable600
Mercury, total recoverable600
Temperature, water deg. centigrade400
Nitrogen, total [as N]400
Chloride [as Cl]400
Iron, total recoverable400
Phenolics, total400
Flow, in conduit or thru treatment plant400
Chromium, hexavalent tot recoverable400
pH200
Hardness, total [as CaCO3]200
Thallium, total recoverable200
Beryllium, total recoverable [as Be]200
Antimony, total recoverable200
Dichlorobromomethane200
Carbon tetrachloride200
1,2-Dichloroethane200
Bromoform200
Chloroform200
Toluene200
Benzene200
Acenaphthylene200
Acenaphthene200
Acrolein200
Acrylonitrile200
Anthracene200
Benzo[k]fluoranthene200
Benzo[a]pyrene200
Bis[2-chloroethyl] ether200
Bis[2-chloroethoxy]methane200
Bis[2-chloroisopropyl] ether200
Butyl benzyl phthalate200
Chlorobenzene200
Chlorodibromomethane200
Chrysene200
Diethyl phthalate200
Dimethyl phthalate200
1,2-Diphenylhydrazine200
Ethylbenzene200

Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES KY0021172.

Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.

Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.

Watch this permit

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How we handle your data → Privacy

EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID KY0021172 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.