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City of Sevierville

Sewage treatment plant, major discharger, Sevierville, Tennessee. NPDES permit TN0063959, in force until Apr 30, 2030. Last 12 months: over a limit 19 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (36 values), outfall INF1 form G monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
41 values over a limit, 15 required values missing, 4 of 17 reports late

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

All 19 values over a limit
Period endingParameterReportedLimitOver by
October 2025IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum.31 %> 1.2 %74%
October 2025Nitrogen, ammonia total [as N], daily maximum11.5 mg/L≤ 10 mg/L15%
October 2025Nitrogen, ammonia total [as N], weekly average326.9 lb/d≤ 300 lb/d9%
October 2025Nitrogen, ammonia total [as N], weekly average7.926 mg/L≤ 7.5 mg/L6%
November 2025E. coli, daily maximum461.1 #/100mL≤ 410 #/100mL12%
January 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
January 2026Solids, settleable, daily maximum18 mL/L≤ 1 mL/L1700%
January 2026Solids, total suspended, daily maximum168 mg/L≤ 45 mg/L273%
January 2026Solids, total suspended, weekly average2138.8 lb/d≤ 1601 lb/d34%
February 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
April 2026SSO, Dry Weather, monthly total2 occur/mo≤ 0 occur/mo—
May 2026E. coli, daily maximum648 #/100mL≤ 410 #/100mL58%
May 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
June 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
June 2026SSO, Wet Weather, monthly total2 occur/mo≤ 0 occur/mo—
July 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
August 2026E. coli, daily maximum2419 #/100mL≤ 410 #/100mL490%
August 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
September 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—

Limits in force (47)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
pHdaily minimum≥ 6 SUall year001
pHdaily maximum≤ 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≤ 1201 lb/dall year001
Solids, total suspendedweekly average≤ 1601 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Nitrogen, total [as N]daily maximumreport only (lb/d)Mar, Jun, Sep, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 10 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≤ 15 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≤ 20 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≤ 400 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 200 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 600 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 300 lb/dMay–Oct001
Phosphorus, total [as P]daily maximumreport only (mg/L)Mar, Jun, Sep, Dec001
Phosphorus, total [as P]daily maximumreport 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≤ 1.6 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 410 #/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≤ 1001 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1401 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 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 1.2 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 1.2 %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/TN0063959 · MCP: https://passage-data.com/mcp