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Knoxville Utilities Board (KUB)

Sewage treatment plant, major discharger, Knoxville, Tennessee. NPDES permit TN0023582, in force until Oct 31, 2027. Last 12 months: over a limit 16 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (34 values), outfall INF1 form G monthly (6 values)
Renewal application due
May 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
17 values over a limit, 0 required values missing, 0 of 24 reports late

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

All 16 values over a limit
Period endingParameterReportedLimitOver by
December 2025SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
January 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
January 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
February 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
February 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
March 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
March 2026Solids, settleable, daily maximum2 mL/L≤ 1 mL/L100%
May 2026SSO, Dry Weather, monthly total3 occur/mo≤ 0 occur/mo—
June 2026SSO, Dry Weather, monthly total2 occur/mo≤ 0 occur/mo—
June 2026SSO, Wet Weather, monthly total4 occur/mo≤ 0 occur/mo—
June 2026Solids, total suspended, daily maximum50 mg/L≤ 45 mg/L11%
July 2026SSO, Dry Weather, monthly total2 occur/mo≤ 0 occur/mo—
July 2026SSO, Wet Weather, monthly total5 occur/mo≤ 0 occur/mo—
August 2026E. coli, daily maximum550 #/100mL≤ 487 #/100mL13%
August 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
September 2026SSO, Dry Weather, monthly total2 occur/mo≤ 0 occur/mo—

Limits in force (45)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 1 mg/Lall 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≤ 11009 lb/dall year001
Solids, total suspendedweekly average≤ 14678 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 7.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 10 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 5504 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1835 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 7339 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 2752 lb/dMay–Oct001
Phosphorus, total [as P]daily maximumreport only (mg/L)all 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≤ .4 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, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 35 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 9174 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12844 lb/dall year001
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year001
BOD, carbonaceous, 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> 4.7 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 4.7 %all year001
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
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all yearINF1
BOD, carbonaceous [5 day, 20 C]daily 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/TN0023582 · MCP: https://passage-data.com/mcp