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City of Henderson

Sewage treatment plant, Henderson, Tennessee. NPDES permit TN0064220, in force until Nov 30, 2026. Last 12 months: over a limit 12 times (last September 2026), 4 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (33 values), outfall INF1 form G monthly (2 values)
Renewal application due
Jun 3, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025E. coli, daily maximum4352 #/100mL≤ 941 #/100mL362%
February 2026BOD, 5-day, percent removal, monthly average minimum57.8 %≥ 65 %21%
March 2026E. coli, daily maximum2420 #/100mL≤ 941 #/100mL157%
June 2026BOD, 5-day, 20 deg. C, daily maximum378 lb/d≤ 255 lb/d48%
June 2026BOD, 5-day, 20 deg. C, weekly average378 lb/d≤ 196 lb/d93%
June 2026BOD, 5-day, 20 deg. C, weekly average61 mg/L≤ 50 mg/L22%
July 2026BOD, 5-day, 20 deg. C, weekly average227.7 lb/d≤ 196 lb/d16%
July 2026BOD, 5-day, 20 deg. C, weekly average51 mg/L≤ 50 mg/L2%
July 2026BOD, 5-day, percent removal, monthly average minimum22.7 %≥ 65 %121%
July 2026E. coli, daily maximum2420 #/100mL≤ 941 #/100mL157%
September 2026BOD, 5-day, 20 deg. C, weekly average60 mg/L≤ 50 mg/L20%
September 2026E. coli, daily maximum1986 #/100mL≤ 941 #/100mL111%

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 1 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 50 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 65 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 176 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 196 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 255 lb/dall year001
pHdaily minimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 100 mg/Lall year001
Solids, total suspendedweekly average≤ 110 mg/Lall year001
Solids, total suspendeddaily maximum≤ 120 mg/Lall year001
Solids, total suspendedmonthly average≤ 392 lb/dall year001
Solids, total suspendedweekly average≤ 431 lb/dall year001
Solids, total suspendeddaily maximum≤ 470 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)all year001
Nitrogen, total [as N]monthly averagereport only (lb/yr)all year001
Nitrogen, total [as N]rolling average≤ 25157 lb/yrall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/d)all year001
Phosphorus, total [as P]rolling average≤ 5788 lb/dall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residualdaily maximum≤ .8 mg/Lall year001
Chlorine, total residualmonthly average≤ .4 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 941 #/100mLall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 2.5 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 2.5 %all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF1
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearINF1

How strict are these limits?

Cited limits by parameter: Tennessee'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/TN0064220 · MCP: https://passage-data.com/mcp