Clean Water Act discharge permit · NPDES KY0020257
MAYSVILLE STP, Maysville, KY: NPDES KY0020257 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 126Pollutants under a numeric limit
- 4Pollutants with an effluent exceedance
MAYSVILLE STP, held by Maysville STP, holds NPDES permit KY0020257, which discharges to Ohio River. EPA’s file records it issued November 23, 2015 and expiring December 31, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | MAYSVILLE STP |
|---|---|
| Permittee as filed | Maysville STP |
| NPDES ID | KY0020257 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Publicly owned treatment works |
| Program | Publicly owned treatment works |
| Issued | November 23, 2015 |
| Expiration date | December 31, 2020 |
| Address | Maysville, KY 41056 |
| Receiving water | OHIO RIVER |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Lawrence Creek-Ohio River (HUC 050902010605) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 127Pollutants on file
- 126Under a numeric limit
- 20With a violation of any kind
- 4With an effluent exceedance
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 127 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Solids, suspended percent removal | 1 | 5 | 4 | March 31, 2004 | 87% over the limit |
| Solids, total suspended | 8 | 9 | 1 | June 30, 2017 | 7% over the limit |
| pH | 2 | 3 | 1 | November 30, 2006 | |
| Chlorine, total residual | 2 | 3 | 1 | September 30, 2003 | 5% over the limit |
| BOD, 5-day, 20 deg. C | 8 | 8 | 0 | ||
| Nitrogen, ammonia total [as N] | 4 | 8 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 2 | 0 | ||
| 1,3-Dichlorobenzene | 2 | 2 | 0 | ||
| 1,4-Dichlorobenzene | 2 | 2 | 0 | ||
| 2-Chloroethyl vinyl ether, [mixed] | 2 | 2 | 0 | ||
| 2-Chloronaphthalene | 2 | 2 | 0 | ||
| 2-Chlorophenol | 2 | 2 | 0 | ||
| 2-Nitrophenol | 2 | 2 | 0 | ||
| 2,4-Dichlorophenol | 2 | 2 | 0 | ||
| 2,4-Dimethylphenol | 2 | 2 | 0 | ||
| 2,4-Dinitrotoluene | 2 | 2 | 0 | ||
| 2,4-Dinitrophenol | 2 | 2 | 0 | ||
| Coliform, fecal general | 0 | 2 | 0 | ||
| Oxygen, dissolved [DO] | 1 | 1 | 0 | ||
| BOD, 5-day, percent removal | 1 | 1 | 0 | ||
| Overflow volume [SS0 volume, CSO volume] | 10 | 0 | 0 | ||
| Duration of discharge | 10 | 0 | 0 | ||
| Discharge event observation [Visual Monitoring] | 9 | 0 | 0 | ||
| Phosphorus, total [as P] | 8 | 0 | 0 | ||
| Zinc, total recoverable | 8 | 0 | 0 | ||
| Cadmium, total recoverable | 8 | 0 | 0 | ||
| Lead, total recoverable | 8 | 0 | 0 | ||
| Copper, total recoverable | 8 | 0 | 0 | ||
| 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 | ||
| Chromium, total recoverable | 6 | 0 | 0 | ||
| Mercury, total recoverable | 6 | 0 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 0 | 0 | ||
| Chloride [as Cl] | 4 | 0 | 0 | ||
| Iron, total recoverable | 4 | 0 | 0 | ||
| Phenolics, total | 4 | 0 | 0 | ||
| Chromium, hexavalent tot recoverable | 4 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 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 |
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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES KY0020257.
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.
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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 KY0020257 there.
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Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.