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City of Millington

Sewage treatment plant, major discharger, Millington, Tennessee. NPDES permit TN0021067, in force until Jun 30, 2027. Last 12 months: over a limit 38 times (last September 2026), 1 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (39 values), outfall INF1 form G monthly (6 values)
Renewal application due
Jan 1, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
15 values over a limit, 0 required values missing, 1 of 24 reports late

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

All 38 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum2.7 mg/L≤ 1.7 mg/L59%
October 2025Nitrogen, ammonia total [as N], weekly average1.35 mg/L≤ 1.3 mg/L4%
October 2025Nitrogen, ammonia total [as N], weekly average90.3 lb/d≤ 63 lb/d43%
November 2025Nitrogen, ammonia total [as N], daily maximum4.1 mg/L≤ 3.5 mg/L17%
April 2026Nitrogen, ammonia total [as N], daily maximum5.2 mg/L≤ 3.5 mg/L49%
April 2026Nitrogen, ammonia total [as N], weekly average3.55 mg/L≤ 2.6 mg/L37%
May 2026Nitrogen, ammonia total [as N], daily maximum3.2 mg/L≤ 1.7 mg/L88%
May 2026Nitrogen, ammonia total [as N], weekly average100.6 lb/d≤ 63 lb/d60%
July 2026Nitrogen, ammonia total [as N], daily maximum23.7 mg/L≤ 1.7 mg/L1294%
July 2026Nitrogen, ammonia total [as N], monthly average15.79 mg/L≤ .85 mg/L1758%
July 2026Nitrogen, ammonia total [as N], monthly average256.5 lb/d≤ 41 lb/d526%
July 2026Nitrogen, ammonia total [as N], weekly average19.46 mg/L≤ 1.3 mg/L1397%
July 2026Nitrogen, ammonia total [as N], weekly average595.1 lb/d≤ 63 lb/d845%
August 2026BOD, carbonaceous [5 day, 20 C], daily maximum52.2 mg/L≤ 20 mg/L161%
August 2026BOD, carbonaceous [5 day, 20 C], monthly average20.9 mg/L≤ 10 mg/L109%
August 2026BOD, carbonaceous [5 day, 20 C], weekly average39.6 mg/L≤ 15 mg/L164%
August 2026BOD, carbonaceous [5 day, 20 C], weekly average934.8 lb/d≤ 726 lb/d29%
August 2026BOD, carbonaceous, percent removal, monthly average minimum79.7 %≥ 85 %35%
August 2026E. coli, daily maximum1070 #/100mL≤ 941 #/100mL14%
August 2026E. coli, monthly geometric mean349.6 #/100mL≤ 126 #/100mL177%
August 2026Nitrogen, ammonia total [as N], daily maximum29.5 mg/L≤ 1.7 mg/L1635%
August 2026Nitrogen, ammonia total [as N], monthly average15.76 mg/L≤ .85 mg/L1754%
August 2026Nitrogen, ammonia total [as N], monthly average212.9 lb/d≤ 41 lb/d419%
August 2026Nitrogen, ammonia total [as N], weekly average24.5 mg/L≤ 1.3 mg/L1785%
August 2026Nitrogen, ammonia total [as N], weekly average360.4 lb/d≤ 63 lb/d472%
August 2026Solids, total suspended, daily maximum71.4 mg/L≤ 45 mg/L59%
August 2026Solids, total suspended, monthly average34.6 mg/L≤ 30 mg/L15%
August 2026Solids, total suspended, weekly average64.9 mg/L≤ 40 mg/L62%
September 2026BOD, carbonaceous [5 day, 20 C], daily maximum26 mg/L≤ 20 mg/L30%
September 2026BOD, carbonaceous [5 day, 20 C], monthly average10.6 mg/L≤ 10 mg/L6%
September 2026BOD, carbonaceous [5 day, 20 C], weekly average17 mg/L≤ 15 mg/L13%
September 2026E. coli, daily maximum2500 #/100mL≤ 941 #/100mL166%
September 2026E. coli, monthly geometric mean261.2 #/100mL≤ 126 #/100mL107%
September 2026Nitrogen, ammonia total [as N], daily maximum47.9 mg/L≤ 1.7 mg/L2718%
September 2026Nitrogen, ammonia total [as N], monthly average18.62 mg/L≤ .85 mg/L2091%
September 2026Nitrogen, ammonia total [as N], monthly average276.2 lb/d≤ 41 lb/d574%
September 2026Nitrogen, ammonia total [as N], weekly average36.1 mg/L≤ 1.3 mg/L2677%
September 2026Nitrogen, ammonia total [as N], weekly average741.8 lb/d≤ 63 lb/d1077%

Limits in force (50)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 8.5 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≤ 1541 lb/dall year001
Solids, total suspendedweekly average≤ 1935 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]annual total≤ 175565 lb/yrall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.75 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .85 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 2.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.3 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 1.7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 85 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 41 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 125 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 63 lb/dMay–Oct001
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]annual total≤ 18615 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 residualmonthly average≤ .014 mg/Lall year001
Chlorine, total residualdaily maximum≤ .024 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, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 20 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 484 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 726 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> 77.8 %all year001
IC25 Static Renewal 7 Day Chronic Pimephalesminimum> 77.8 %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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Your permit document is the final word. As JSON: /api/v1/permits/TN0021067 · MCP: https://passage-data.com/mcp