Clean Water Act discharge permit · NPDES KY0021041

BUTLER STP, Butler, KY: NPDES KY0021041 discharge permit, effluent exceedances, inspections, penalties

Administratively continuedPermit status
MinorDischarger class
19Pollutants under a numeric limit
10Pollutants with an effluent exceedance
1Inspections on file
0Formal enforcement actions

BUTLER STP, held by Butler STP, holds NPDES permit KY0021041, which discharges to Licking River. EPA’s file records it issued April 5, 2016 and expiring May 31, 2021.

BUTLER STP, Butler, Kentucky: Individual permit KY0021041, held by Butler STP; Publicly owned treatment works; Administratively continued (past its expiration date and still in force until reissued); issued April 5, 2016, term to May 31, 2021; discharges to LICKING RIVER.

Chlorine, total residual: 2 limits, 185 violations of any kind, 181 effluent exceedances, latest November 30, 2023, largest 75,689% over the limit.
Oxygen, dissolved [DO]: 1 limit, 123 violations of any kind, 121 effluent exceedances, latest August 31, 2025, largest 99,999% over the limit.
E. coli: 2 limits, 107 violations of any kind, 102 effluent exceedances, latest July 31, 2026, largest 99,999% over the limit.
BOD, 5-day, 20 deg. C: 6 limits, 55 violations of any kind, 39 effluent exceedances, latest July 31, 2026, largest 99,999% over the limit.
Coliform, fecal general: 0 limits, 34 violations of any kind, 34 effluent exceedances, latest October 31, 2007, largest 99,999% over the limit.
BOD, 5-day, percent removal: 1 limit, 34 violations of any kind, 32 effluent exceedances, latest December 31, 2024, largest 567% over the limit.
Solids, suspended percent removal: 1 limit, 34 violations of any kind, 32 effluent exceedances, latest July 31, 2026, largest 567% over the limit.
pH: 2 limits, 28 violations of any kind, 23 effluent exceedances, latest February 28, 2026.
Solids, total suspended: 6 limits, 37 violations of any kind, 21 effluent exceedances, latest July 31, 2026, largest 1,033% over the limit.
Nitrogen, ammonia total [as N]: 2 limits, 25 violations of any kind, 5 effluent exceedances, latest September 30, 2022, largest 159% over the limit.
Phosphorus, total [as P]: 4 limits, 6 violations of any kind, 0 effluent exceedances.
Nitrogen, total [as N]: 2 limits, 6 violations of any kind, 0 effluent exceedances.
Hardness, total [as CaCO3]: 2 limits, 6 violations of any kind, 0 effluent exceedances.
Flow, in conduit or thru treatment plant: 4 limits, 4 violations of any kind, 0 effluent exceedances.
Zinc, total recoverable: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Cadmium, total recoverable: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Lead, total recoverable: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Copper, total recoverable: 0 limits, 4 violations of any kind, 0 effluent exceedances.
Toxicity, final conc toxicity units: 2 limits, 2 violations of any kind, 0 effluent exceedances.
Temperature, water deg. fahrenheit: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Oil & Grease: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrogen, Kjeldahl Total: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Nitrite Plus Nitrate Total: 2 limits, 0 violations of any kind, 0 effluent exceedances.
Solids, total dissolved [TDS]: 2 limits, 0 violations of any kind, 0 effluent exceedances.

September 14, 2026: Evaluation (S).

Kentucky holds 294 Publicly owned treatment works coverages of this permit type in EPA’s file; 77 were issued before KY0021041.

Coverages issued nearest KY0021041

January 25, 2016: MAYFIELD ELECTRIC & WATER SYSTEMS, South Highland, KY0055221, held by Mayfield Electric & Water Systems
February 17, 2016: LEDBETTER SANITATION DISTRICT #1, Ledbetter, KY0100251, held by Ledbetter Sanitation District #1
February 18, 2016: FANCY FARM WATER DISTRICT STP, Fancy Farm, KY0053562, held by Fancy Farm Water District STP
March 22, 2016: CALVERT CITY STP, Calvert City, KY0021130, held by Calvert City STP
March 22, 2016: WORTHINGTON WWTP, Worthington, KY0022926, held by Worthington WWTP
April 5, 2016: PADUCAH/MCCRACKEN COUNTY JSA - REIDLAND, Paducah, KY0025810, held by Paducah/McCracken County JSA - Reidland
April 5, 2016: NORTHERN MADISON COUNTY SANITATION DISTRICT, Richmond, KY0105376, held by Northern Madison County Sanitation District
April 19, 2016: EDDYVILLE STP, Eddyville, KY0027979, held by Eddyville STP
April 20, 2016: CLOSPLINT STP, Closplint, KY0105155, held by Closplint STP
June 9, 2016: TOMPKINSVILLE STP, Tompkinsville, KY0020702, held by Tompkinsville STP

BUTLER STP among its neighbors

EPA’s permit file holds 9 discharge permits in the Tate Creek subwatershed (HUC 051002050306), KY0021041 among them. Its county holds 32, 0 of them major permits; KY0021041 is a minor permit.

Other permits in the Tate Creek subwatershed (HUC 051002050306)

AUTOZONE STORE # 10046, Richmond: KYR10T377, minor permit, discharging to Irvine Lick, permit term to December 31, 2029
BARNES MILL VILLAS, Richmond: KYR10T614, minor permit, discharging to Irvine Lick, permit term to December 31, 2029
FAWKES (CROOKSVILLE) – WEST BEREA 69KV TRANSMISSION LINE PROJECT, Richmond: KYR10U332, minor permit, discharging to Muddy Creek, permit term to December 31, 2029
HILLTOP STONE LLC, Butler: KY0112127, minor permit, discharging to Flour Crk, permit term to April 30, 2022
LOVES TRAVEL STOP #291, Richmond: KY0104809, minor permit, discharging to FORD CRK, permit term to October 31, 2023
MADISON COUNTY 69 KV SWITCHING STATION, Richmond: KYR10U288, minor permit, discharging to Harts Fork, permit term to December 31, 2029
RICHMOND TATES CREEK STP, Richmond: KYL022853, minor permit, permit term to December 31, 2025
THE FARMS AT BARNES MILL - NEW HOLLAND BOULEVARD & RESIDENTIAL AREA GRADING, Richmond: KYR10U437, minor permit, discharging to Finney Fork, permit term to December 31, 2029

Identity

Facility as filed	BUTLER STP
Permittee as filed	Butler STP
NPDES ID	KY0021041
Permit status	Administratively continued (past its expiration date and still in force until reissued)
Permit type	Individual permit
Discharger class	Minor discharger
Facility type	Publicly owned treatment works
Program	Publicly owned treatment works
Issued	April 5, 2016
Expiration date	May 31, 2021
Address	Butler, KY 41006
Receiving water	LICKING RIVER
Subwatershed	Tate Creek (HUC 051002050306)

Effluent limits and exceedances

24Pollutants on file
19Under a numeric limit
19With a violation of any kind
10With 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.

Pollutant or measure	Limits	Violations, any kind	Effluent exceedances	Latest exceedance	Largest exceedance, as filed
Chlorine, total residual	2	185	181	November 30, 2023	75,689% over the limit
Oxygen, dissolved [DO]	1	123	121	August 31, 2025	99,999% over the limit
E. coli	2	107	102	July 31, 2026	99,999% over the limit
BOD, 5-day, 20 deg. C	6	55	39	July 31, 2026	99,999% over the limit
Coliform, fecal general	0	34	34	October 31, 2007	99,999% over the limit
BOD, 5-day, percent removal	1	34	32	December 31, 2024	567% over the limit
Solids, suspended percent removal	1	34	32	July 31, 2026	567% over the limit
pH	2	28	23	February 28, 2026
Solids, total suspended	6	37	21	July 31, 2026	1,033% over the limit
Nitrogen, ammonia total [as N]	2	25	5	September 30, 2022	159% over the limit
Phosphorus, total [as P]	4	6	0
Nitrogen, total [as N]	2	6	0
Hardness, total [as CaCO3]	2	6	0
Flow, in conduit or thru treatment plant	4	4	0
Zinc, total recoverable	0	4	0
Cadmium, total recoverable	0	4	0
Lead, total recoverable	0	4	0
Copper, total recoverable	0	4	0
Toxicity, final conc toxicity units	2	2	0
Temperature, water deg. fahrenheit	2	0	0
Oil & Grease	2	0	0
Nitrogen, Kjeldahl Total	2	0	0
Nitrite Plus Nitrate Total	2	0	0
Solids, total dissolved [TDS]	2	0	0

Inspections, violations and enforcement

0Single-event violations

EPA’s single-event violation file, as loaded, holds no violation for NPDES KY0021041.

Inspections

Date	What EPA recorded	Agency
September 14, 2026	Evaluation	S

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES KY0021041.

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

This public-records page covers the Clean Water Act discharge permit NPDES KY0021041 held by BUTLER STP in Butler, KY, which discharges to the LICKING RIVER within the Tate Creek subwatershed (HUC 051002050306). The page lists a permit status of Administratively continued, a discharger class of Minor, and 24 pollutants on file, of which 19 are under a numeric limit and 10 have an effluent exceedance.