NPDES KY0104400 · Clean Water Act
MOUNT STERLING HINKSTON CREEK STP, Mount Sterling, KY: NPDES KY0104400 discharge permit, effluent exceedances, inspections, penalties
MOUNT STERLING HINKSTON CREEK STP, Mount Sterling, Kentucky: Individual permit KY0104400, held by Mount Sterling Hinkston Creek STP; Publicly owned treatment works; Effective; issued March 26, 2018, term to April 30, 2023; discharges to HINKSTON CRK.
50 of the 60 pollutants listed for NPDES KY0104400 have no violation or effluent exceedance.
- Phosphorus, total [as P]: 12 limits, 17 violations of any kind, 17 effluent exceedances, latest July 31, 2025, largest 310% over the limit.
- BOD, carbonaceous [5 day, 20 C]: 6 limits, 18 violations of any kind, 15 effluent exceedances, latest October 31, 2024, largest 296% over the limit.
- Coliform, fecal general: 0 limits, 14 violations of any kind, 14 effluent exceedances, latest June 30, 2007, largest 99,999% over the limit.
- Nitrogen, ammonia total [as N]: 4 limits, 12 violations of any kind, 12 effluent exceedances, latest June 30, 2024, largest 240% over the limit.
- Toxicity, final conc toxicity units: 1 limit, 13 violations of any kind, 10 effluent exceedances, latest December 31, 2025, largest 99,999% over the limit.
- Solids, total suspended: 6 limits, 6 violations of any kind, 6 effluent exceedances, latest March 31, 2015, largest 78% over the limit.
- E. coli: 2 limits, 5 violations of any kind, 4 effluent exceedances, latest July 31, 2022, largest 908% over the limit.
- Solids, suspended percent removal: 1 limit, 3 violations of any kind, 3 effluent exceedances, latest December 31, 2004, largest 60% over the limit.
- pH: 2 limits, 2 violations of any kind, 1 effluent exceedance, latest January 31, 2004.
- BOD, carb-5 day, 20 deg C, percent removal: 1 limit, 1 violation of any kind, 1 effluent exceedance, latest January 31, 2004, largest 13% over the limit.
- Oil & Grease: 6 limits.
- Cyanide, free [amenable to chlorination]: 6 limits.
- Arsenic, total recoverable: 6 limits.
- Selenium, total recoverable: 6 limits.
- Nickel, total recoverable: 6 limits.
- Silver total recoverable: 6 limits.
- Zinc, total recoverable: 6 limits.
- Cadmium, total recoverable: 6 limits.
- Lead, total recoverable: 6 limits.
- Chromium, total recoverable: 6 limits.
- Copper, total recoverable: 6 limits.
- Mercury, total recoverable: 6 limits.
- Nitrogen, total [as N]: 4 limits.
- Chloride [as Cl]: 4 limits.
- Iron, total recoverable: 4 limits.
- Phenolics, total: 4 limits.
- Flow, in conduit or thru treatment plant: 4 limits.
- Chromium, hexavalent tot recoverable: 4 limits.
- Temperature, water deg. fahrenheit: 2 limits.
- Hardness, total [as CaCO3]: 2 limits.
- Thallium, total recoverable: 2 limits.
- Beryllium, total recoverable [as Be]: 2 limits.
- Antimony, total recoverable: 2 limits.
- Dichlorobromomethane: 2 limits.
- Carbon tetrachloride: 2 limits.
- 1,2-Dichloroethane: 2 limits.
- Bromoform: 2 limits.
- Chloroform: 2 limits.
- Toluene: 2 limits.
- Benzene: 2 limits.
- Acenaphthylene: 2 limits.
- Acenaphthene: 2 limits.
- Acrolein: 2 limits.
- Acrylonitrile: 2 limits.
- Anthracene: 2 limits.
- Benzo[k]fluoranthene: 2 limits.
- Benzo[a]pyrene: 2 limits.
- Bis[2-chloroethyl] ether: 2 limits.
- Bis[2-chloroethoxy]methane: 2 limits.
- Bis[2-chloroisopropyl] ether: 2 limits.
- Butyl benzyl phthalate: 2 limits.
- Chlorobenzene: 2 limits.
- Chlorodibromomethane: 2 limits.
- Chrysene: 2 limits.
- Diethyl phthalate: 2 limits.
- Dimethyl phthalate: 2 limits.
- 1,2-Diphenylhydrazine: 2 limits.
- Ethylbenzene: 2 limits.
- Fluoranthene: 2 limits.
- Fluorene: 2 limits.
- July 27, 2026: Notice of Violation (State).
- July 6, 2026: Evaluation (S).
- June 30, 2026: Evaluation (IU) (S).
- June 30, 2026: Evaluation (S).
- June 20, 2026: Audit (S).
- January 30, 2026: Effluent Violations - Failed Toxicity Test (ST6).
- January 30, 2026: Notice of Violation (State).
- October 16, 2025: Effluent Violations - Failed Toxicity Test (ST6).
- June 26, 2025: Permit Violations - Violation Specified in Comment (ST6).
- June 12, 2025: Effluent Violations - Failed Toxicity Test (ST6).
- February 7, 2025: Effluent Violations - Failed Toxicity Test (ST6).
- June 6, 2024: Permit Violations - Violation Specified in Comment (ST6).
- May 9, 2023: Permit Violations - Violation Specified in Comment (ST6).
- May 9, 2023: Management Practice Violations - Improper Operation and Maintenance (ST6).
- May 9, 2023: Management Practice Violations - No Licensed/Certified Operator (ST6).
- May 9, 2023: Reporting Violations - Failure to Notify (ST6).
Kentucky holds 294 Publicly owned treatment works coverages of this permit type in EPA’s file; 146 were issued before KY0104400.
Coverages issued nearest KY0104400
- 2018-02-16: SYMSONIA WATER & SEWER, Symsonia: KY0055271, held by Symsonia Water & Sewer
- 2018-02-20: DAWSON SPRINGS STP, Dawson Springs: KY0023868, held by Dawson Springs STP
- 2018-02-26: NEW HAVEN STP, New Haven: KY0034126, held by New Haven STP
- 2018-03-13: DEREK R GUTHRIE WQTC MSD, Louisville: KY0078956, held by Derek R Guthrie WQTC MSD
- 2018-03-26: BURKESVILLE WWTP, Burkesville: KY0036854, held by Burkesville WWTP
- 2018-04-03: FRENCHBURG STP, Frenchburg: KY0040584, held by Frenchburg STP
- 2018-04-05: BOONEVILLE STP, Booneville: KY0033774, held by Booneville STP
- 2018-04-05: FORDSVILLE STP, Fordsville: KY0054801, held by Fordsville STP
- 2018-04-05: JACKSON CO REGIONAL IND PARK, Mckee: KY0088251, held by Jackson Co Regional Ind Park
- 2018-04-09: SMITHLAND STP, Smithland: KY0025836, held by Smithland STP
MOUNT STERLING HINKSTON CREEK STP among its neighbors
10 discharge permits are in the Headwaters Hinkston Creek subwatershed (HUC 051001020302); KY0104400 is one. Its county: 23, 1 major; KY0104400 is major permit.
Other permits in the Headwaters Hinkston Creek subwatershed (HUC 051001020302)
- 9739 CR TETLP DANV-OWSV 483 CLASS REPLACEMENTS W/ HYDROTEST PROJECT, Mount Sterling: KYR10U048, minor, term to 2029-12-31
- COMMUNITY TRUST BANK - MT. STERLING, Mount Sterling: KYR10T484, minor, term to 2029-12-31
- DOLLAR GENERAL, Mount Sterling: KYR10T263, minor, term to 2029-12-31
- EXPRESS OIL CHANGE MT. STERLING, KY, Mount Sterling: KYR10T739, minor, term to 2029-12-31
- KEYSTOPS LLC - MOUNT STERLING BULK PLANT, Mount Sterling: KYR004583, minor, term to 2028-07-31
- MONTGOMERY CO STATE MAINTENANCE GARAGE, Mount Sterling: KYR004656, minor, term to 2028-07-31
- NUGEN ENVIRONMENTAL, Mount Sterling: KYR004830, minor, term to 2028-07-31
- REGAL BELOIT AMERICA INC, Mount Sterling: KY0002771, minor, term to 2013-07-31
- SHARPSBURG STP, Sharpsburg: KY0088421, minor, term to 2021-07-31
Identity
| Facility | MOUNT STERLING HINKSTON CREEK STP |
|---|---|
| Permittee | Mount Sterling Hinkston Creek STP |
| NPDES ID | KY0104400 |
| Status | Effective |
| Type | Individual permit |
| Class | Major |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | March 26, 2018 |
| Expires | April 30, 2023 |
| Address | Mount Sterling, KY 40353 |
| Receiving water | HINKSTON CRK |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Headwaters Hinkston Creek (HUC 051001020302) |
NPDES KY0104400: effluent limits and exceedances
MOUNT STERLING HINKSTON CREEK STP (NPDES KY0104400): 122 pollutants on file, 121 limited; 10 with a violation of any kind, 10 with an exceedance.
The 60 with the most exceedances of the 122 on file for NPDES KY0104400. How exceedances are counted.
| Pollutant | Limits | Violations | Exceedances | Latest | Largest, as filed |
|---|---|---|---|---|---|
| Phosphorus, total [as P] | 12 | 17 | 17 | July 31, 2025 | 310% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 6 | 18 | 15 | October 31, 2024 | 296% over the limit |
| Coliform, fecal general | 0 | 14 | 14 | June 30, 2007 | 99,999% over the limit |
| Nitrogen, ammonia total [as N] | 4 | 12 | 12 | June 30, 2024 | 240% over the limit |
| Toxicity, final conc toxicity units | 1 | 13 | 10 | December 31, 2025 | 99,999% over the limit |
| Solids, total suspended | 6 | 6 | 6 | March 31, 2015 | 78% over the limit |
| E. coli | 2 | 5 | 4 | July 31, 2022 | 908% over the limit |
| Solids, suspended percent removal | 1 | 3 | 3 | December 31, 2004 | 60% over the limit |
| pH | 2 | 2 | 1 | January 31, 2004 | |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 1 | January 31, 2004 | 13% over the limit |
| Oil & Grease | 6 | 0 | 0 | ||
| Cyanide, free [amenable to chlorination] | 6 | 0 | 0 | ||
| Arsenic, total recoverable | 6 | 0 | 0 | ||
| Selenium, total recoverable | 6 | 0 | 0 | ||
| Nickel, total recoverable | 6 | 0 | 0 | ||
| Silver total recoverable | 6 | 0 | 0 | ||
| Zinc, total recoverable | 6 | 0 | 0 | ||
| Cadmium, total recoverable | 6 | 0 | 0 | ||
| Lead, total recoverable | 6 | 0 | 0 | ||
| Chromium, total recoverable | 6 | 0 | 0 | ||
| Copper, total recoverable | 6 | 0 | 0 | ||
| Mercury, total recoverable | 6 | 0 | 0 | ||
| Nitrogen, total [as N] | 4 | 0 | 0 | ||
| Chloride [as Cl] | 4 | 0 | 0 | ||
| Iron, total recoverable | 4 | 0 | 0 | ||
| Phenolics, total | 4 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 0 | 0 | ||
| Chromium, hexavalent tot recoverable | 4 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 2 | 0 | 0 | ||
| Thallium, total recoverable | 2 | 0 | 0 | ||
| Beryllium, total recoverable [as Be] | 2 | 0 | 0 | ||
| Antimony, total recoverable | 2 | 0 | 0 | ||
| Dichlorobromomethane | 2 | 0 | 0 | ||
| Carbon tetrachloride | 2 | 0 | 0 | ||
| 1,2-Dichloroethane | 2 | 0 | 0 | ||
| Bromoform | 2 | 0 | 0 | ||
| Chloroform | 2 | 0 | 0 | ||
| Toluene | 2 | 0 | 0 | ||
| Benzene | 2 | 0 | 0 | ||
| Acenaphthylene | 2 | 0 | 0 | ||
| Acenaphthene | 2 | 0 | 0 | ||
| Acrolein | 2 | 0 | 0 | ||
| Acrylonitrile | 2 | 0 | 0 | ||
| Anthracene | 2 | 0 | 0 | ||
| Benzo[k]fluoranthene | 2 | 0 | 0 | ||
| Benzo[a]pyrene | 2 | 0 | 0 | ||
| Bis[2-chloroethyl] ether | 2 | 0 | 0 | ||
| Bis[2-chloroethoxy]methane | 2 | 0 | 0 | ||
| Bis[2-chloroisopropyl] ether | 2 | 0 | 0 | ||
| Butyl benzyl phthalate | 2 | 0 | 0 | ||
| Chlorobenzene | 2 | 0 | 0 | ||
| Chlorodibromomethane | 2 | 0 | 0 | ||
| Chrysene | 2 | 0 | 0 | ||
| Diethyl phthalate | 2 | 0 | 0 | ||
| Dimethyl phthalate | 2 | 0 | 0 | ||
| 1,2-Diphenylhydrazine | 2 | 0 | 0 | ||
| Ethylbenzene | 2 | 0 | 0 | ||
| Fluoranthene | 2 | 0 | 0 | ||
| Fluorene | 2 | 0 | 0 |
NPDES KY0104400: inspections, violations and enforcement
NPDES KY0104400: 10 single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| January 30, 2026 | Effluent Violations - Failed Toxicity Test | ST6 |
| October 16, 2025 | Effluent Violations - Failed Toxicity Test | ST6 |
| June 26, 2025 | Permit Violations - Violation Specified in Comment | ST6 |
| June 12, 2025 | Effluent Violations - Failed Toxicity Test | ST6 |
| February 7, 2025 | Effluent Violations - Failed Toxicity Test | ST6 |
| June 6, 2024 | Permit Violations - Violation Specified in Comment | ST6 |
| May 9, 2023 | Permit Violations - Violation Specified in Comment | ST6 |
| May 9, 2023 | Management Practice Violations - Improper Operation and Maintenance | ST6 |
| May 9, 2023 | Management Practice Violations - No Licensed/Certified Operator | ST6 |
| May 9, 2023 | Reporting Violations - Failure to Notify | ST6 |
NPDES KY0104400: 4 inspections
| Date | What EPA recorded | Agency |
|---|---|---|
| July 6, 2026 | Evaluation | S |
| June 30, 2026 | Evaluation (IU) | S |
| June 30, 2026 | Evaluation | S |
| June 20, 2026 | Audit | S |
NPDES KY0104400: 2 informal enforcement actions
| Date | What EPA recorded | Agency |
|---|---|---|
| July 27, 2026 | Notice of Violation | State |
| January 30, 2026 | Notice of Violation | State |
NPDES KY0104400 (MOUNT STERLING HINKSTON CREEK STP): no formal enforcement action on file.
Watch NPDES KY0104400
NPDES KY0104400: one email when its EPA record changes — $99/month.
Permits near NPDES KY0104400
NPDES KY0104400: 122 pollutant rows, 16 dated events; ICIS-NPDES download, loaded September 15, 2026.