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City of Union City

Sewage treatment plant, major discharger, Union City, Tennessee. NPDES permit TN0021580, in force until Oct 31, 2030. Last 12 months: no values over a limit, 1 of 23 reports late. 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 (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Limits in force (60)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 30 mg/LMay–Oct001
Solids, total suspendedweekly average≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 40 mg/LMay–Oct001
Solids, total suspendeddaily maximum≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendeddaily maximum≤ 45 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 1626 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 1251 lb/dMay–Oct001
Solids, total suspendeddaily maximum≤ 2439 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendeddaily maximum≤ 1877 lb/dMay–Oct001
Solids, total suspendedweekly average≤ 1668 lb/dMay–Oct001
Solids, total suspendedweekly average≤ 2168 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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≤ 124960 lb/yrall year001
Nitrogen, ammonia total [as N]monthly average≤ 4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 167 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 325 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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]rolling average≤ 39878 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≤ .13 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Chlorine, total residualmonthly average≤ .16 mg/LMay–Oct001
Chlorine, total residualdaily maximum≤ .22 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Chlorine, total residualdaily maximum≤ .28 mg/LMay–Oct001
E. colimonthly geometric mean≤ 126 MPN/100mLall year001
E. colidaily maximum≤ 410 MPN/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/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 35 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 35 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 40 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1355 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 1042 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 2168 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 1668 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1460 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 1897 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 9 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 9 %all year001
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF1
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all yearINF1
Nitrogen, ammonia total [as N]daily 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/TN0021580 · MCP: https://passage-data.com/mcp