Passage Data · Check a report · Use it from your AI

Butler STP

Sewage treatment plant, Butler, Kentucky. NPDES permit KY0021041 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 14 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (37 values), form 3 twice a year, form 4 yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 0 of 15 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 14 values over a limit
Period endingParameterReportedLimitOver by
February 2026E. coli, 7-day geometric mean649 #/100mL≤ 240 #/100mL170%
February 2026Solids, suspended percent removal, monthly average minimum68.1 %≥ 85 %113%
February 2026Solids, total suspended, monthly average63 mg/L≤ 30 mg/L110%
February 2026Solids, total suspended, maximum weekly average206 mg/L≤ 45 mg/L358%
February 2026pH, minimum4.43 SU≥ 6 SU—
June 2026E. coli, 7-day geometric mean649 #/100mL≤ 240 #/100mL170%
July 2026BOD, 5-day, 20 deg. C, maximum weekly average87 mg/L≤ 45 mg/L93%
July 2026E. coli, 30-day geometric mean328.87 #/100mL≤ 130 #/100mL153%
July 2026E. coli, 7-day geometric mean2420 #/100mL≤ 240 #/100mL908%
July 2026Solids, suspended percent removal, monthly average minimum61.95 %≥ 85 %154%
July 2026Solids, total suspended, monthly average51.75 mg/L≤ 30 mg/L73%
July 2026Solids, total suspended, maximum weekly average192 mg/L≤ 45 mg/L327%
July 2026Solids, total suspended, maximum weekly average81.78 lb/d≤ 52.5 lb/d56%
August 2026E. coli, 7-day geometric mean1646.33 #/100mL≤ 240 #/100mL586%

Limits in force (50)

ParameterStatisticLimitMonths
Temperature, water deg. fahrenheitaveragereport only (deg F)all year
Temperature, water deg. fahrenheitmaximumreport only (deg F)all year
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 35 lb/dall year
BOD, 5-day, 20 deg. Cmaximum weekly average≤ 52.5 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmaximum weekly averagereport only (mg/L)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedmaximum weekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 35 lb/dall year
Solids, total suspendedmaximum weekly average≤ 52.5 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmaximum weekly averagereport only (mg/L)all year
Oil & Greaseaveragereport only (mg/L)all year
Oil & Greasemaximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, total [as N]monthly averagereport only (mg/L)all year
Nitrogen, total [as N]daily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly average≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 23.4 lb/dall year
Nitrogen, ammonia total [as N]maximum weekly average≤ 35.1 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]maximumreport only (mg/L)all year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Hardness, total [as CaCO3]monthly averagereport only (mg/L)all year
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .019 mg/Lall year
E. coli30-day geometric mean≤ 130 #/100mLall year
E. coli7-day geometric mean≤ 240 #/100mLall year
Nitrogen, Kjeldahl Totalaveragereport only (mg/L)all year
Nitrogen, Kjeldahl Totalmaximumreport only (mg/L)all year
Nitrite Plus Nitrate Totalaveragereport only (mg/L)all year
Nitrite Plus Nitrate Totalmaximumreport only (mg/L)all year
Toxicity, final conc toxicity unitsmaximum≤ 1 tox acuteall year
Solids, total dissolved [TDS]averagereport only (mg/L)all year
Solids, total dissolved [TDS]maximumreport only (mg/L)all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Kentucky's rules and the federal ones.

Check this month's numbers Email me before each report is due

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/KY0021041 · MCP: https://passage-data.com/mcp