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City of Henderson

Sewage treatment plant, Henderson, Tennessee. NPDES permit TN0064238, in force until Nov 30, 2026. Last 12 months: over a limit 7 times (last March 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 (31 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
3 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, 20 deg. C, daily maximum167 mg/L≤ 65 mg/L157%
January 2026BOD, 5-day, 20 deg. C, daily maximum370.5 lb/d≤ 325 lb/d14%
January 2026BOD, 5-day, 20 deg. C, monthly average69.3 mg/L≤ 45 mg/L54%
January 2026BOD, 5-day, 20 deg. C, weekly average167 mg/L≤ 50 mg/L234%
January 2026BOD, 5-day, 20 deg. C, weekly average370.5 lb/d≤ 250 lb/d48%
January 2026BOD, 5-day, percent removal, monthly average minimum45.3 %≥ 65 %56%
March 2026BOD, 5-day, percent removal, monthly average minimum61.5 %≥ 65 %10%

Limits in force (33)

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≤ 225 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 250 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 325 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≤ 500 lb/dall year001
Solids, total suspendedweekly average≤ 550 lb/dall year001
Solids, total suspendeddaily maximum≤ 600 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/d)all year001
Nitrogen, total [as N]rolling average≤ 12908 lb/dall year001
Phosphorus, total [as P]monthly averagereport only (mg/L)all year001
Phosphorus, total [as P]monthly averagereport only (lb/yr)all year001
Phosphorus, total [as P]rolling average≤ 2244 lb/yrall 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≤ .6 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
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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Your permit document is the final word. As JSON: /api/v1/permits/TN0064238 · MCP: https://passage-data.com/mcp