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Henderson STP

Sewage treatment plant, major discharger, Henderson, Kentucky. NPDES permit KY0020711 expired Dec 31, 2014; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 1 monthly (37 values), form 2 quarterly (1 value)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 16 reports late

Limits in force (40)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 2 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 3753 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 5630 lb/dall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)all year
pHminimum≥ 6 SUall year
pHmaximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 3753 lb/dall year
Solids, total suspendeddaily maximum≤ 5630 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendeddaily maximumreport only (lb/d)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≤ 2502 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 3753 lb/dall year
Phosphorus, total [as P]monthly averagereport only (mg/L)all year
Phosphorus, total [as P]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
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≤ .019 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
Toxicity, final conc toxicity unitsaveragereport only (tox acute)all year
Toxicity, final conc toxicity unitsdaily maximum≤ 1 tox acuteall year
Toxicity, final conc toxicity unitsdaily maximum≤ 1 tox acuteall year
BOD, 5-day, percent removalmonthly minimum≥ 85 %all year
Solids, suspended percent removalmonthly minimum≥ 85 %all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/KY0020711 · MCP: https://passage-data.com/mcp