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Joint Sewerage System

Sewage treatment plant, major discharger, Bluff City, Tennessee. NPDES permit TN0023531, in force until May 31, 2027. Last 12 months: over a limit 18 times (last August 2026), 3 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (29 values), outfall INF1 form G monthly (6 values)
Renewal application due
Dec 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
38 values over a limit, 0 required values missing, 2 of 24 reports late

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

All 18 values over a limit
Period endingParameterReportedLimitOver by
January 2026BOD, 5-day, 20 deg. C, daily maximum55 mg/L≤ 45 mg/L22%
February 2026BOD, 5-day, 20 deg. C, daily maximum115 mg/L≤ 45 mg/L156%
February 2026BOD, 5-day, 20 deg. C, weekly average5453 lb/d≤ 5004 lb/d9%
February 2026BOD, 5-day, percent removal, daily minimum-28 %≥ 40 %113%
February 2026Solids, suspended percent removal, daily minimum-144 %≥ 40 %307%
February 2026Solids, suspended percent removal, monthly average minimum79 %≥ 85 %40%
February 2026Solids, total suspended, daily maximum205 mg/L≤ 45 mg/L356%
February 2026Solids, total suspended, monthly average34 mg/L≤ 30 mg/L13%
February 2026Solids, total suspended, monthly average4741 lb/d≤ 3753 lb/d26%
February 2026Solids, total suspended, weekly average13089 lb/d≤ 5004 lb/d162%
February 2026Solids, total suspended, weekly average82 mg/L≤ 40 mg/L105%
March 2026BOD, 5-day, 20 deg. C, daily maximum58 mg/L≤ 45 mg/L29%
March 2026BOD, 5-day, percent removal, daily minimum34 %≥ 40 %10%
March 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
March 2026Solids, suspended percent removal, daily minimum34 %≥ 40 %10%
March 2026Solids, total suspended, daily maximum85 mg/L≤ 45 mg/L89%
July 2026SSO, Wet Weather, monthly total2 occur/mo≤ 0 occur/mo—
August 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—

Limits in force (37)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 1.5 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 40 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 3753 lb/dall year001
BOD, 5-day, 20 deg. Cweekly average≤ 5004 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 40 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendedmonthly average≤ 3753 lb/dall year001
Solids, total suspendedweekly average≤ 5004 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]quarterly averagereport only (mg/L)Mar, Jun, Sep, Dec001
Nitrogen, total [as N]quarterly averagereport only (lb/d)Mar, Jun, Sep, Dec001
Phosphorus, total [as P]quarterly averagereport only (mg/L)Mar, Jun, Sep, Dec001
Phosphorus, total [as P]quarterly averagereport only (lb/d)Mar, Jun, Sep, Dec001
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≤ .31 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 487 #/100mLall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
BOD, 5-day, percent removaldaily minimum≥ 40 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removaldaily minimum≥ 40 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 14.2 %Dec001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 14.2 %Dec001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearINF1
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearINF1
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF1
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all yearINF1
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all yearINF1

How strict are these limits?

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

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/TN0023531 · MCP: https://passage-data.com/mcp