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City of Decherd

Sewage treatment plant, major discharger, Decherd, Tennessee. NPDES permit TN0020508, in force until Jun 30, 2027. Last 12 months: over a limit 11 times (last September 2026), 2 required values missing, 4 of 24 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (114 values), outfall INF1 form G monthly (18 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
3 values over a limit, 3 required values missing, 4 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025Phosphorus, total [as P], rolling average2430.59 lb/yr≤ 1533 lb/yr59%
February 2026IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas, minimum19.6 %≥ 100 %80%
February 2026IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas, minimum19.6 %≥ 100 %80%
March 2026IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas, minimum87.2 %≥ 100 %13%
March 2026IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas, minimum87.2 %≥ 100 %13%
August 2026BOD, carbonaceous [5 day, 20 C], daily maximum8.1 mg/L≤ 8 mg/L1%
August 2026Nitrogen, ammonia total [as N], daily maximum5.95 mg/L≤ 1 mg/L495%
August 2026Nitrogen, ammonia total [as N], monthly average1.406 mg/L≤ .4 mg/L252%
September 2026BOD, carbonaceous [5 day, 20 C], monthly average4.1 mg/L≤ 4 mg/L3%
September 2026Nitrogen, ammonia total [as N], daily maximum6 mg/L≤ 1 mg/L500%
September 2026Nitrogen, ammonia total [as N], monthly average1.288 mg/L≤ .4 mg/L222%

Limits in force (147)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedmonthly average≤ 12 mg/Lall year001
Solids, total suspendedweekly average≤ 16 mg/Lall year001
Solids, total suspendedweekly average≤ 16 mg/Lall year001
Solids, total suspendedweekly average≤ 16 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendeddaily maximum≤ 24 mg/Lall year001
Solids, total suspendedmonthly average≤ 250 lb/dall year001
Solids, total suspendedmonthly average≤ 250 lb/dall year001
Solids, total suspendedmonthly average≤ 250 lb/dall year001
Solids, total suspendedweekly average≤ 334 lb/dall year001
Solids, total suspendedweekly average≤ 334 lb/dall year001
Solids, total suspendedweekly average≤ 334 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, total [as N]monthly averagereport only (lb/d)May–Oct001
Nitrogen, total [as N]monthly averagereport only (lb/d)May–Oct001
Nitrogen, total [as N]monthly averagereport only (lb/d)May–Oct001
Nitrogen, total [as N]rolling average≤ 33470 lb/yrMay–Oct001
Nitrogen, total [as N]rolling average≤ 33470 lb/yrMay–Oct001
Nitrogen, total [as N]rolling average≤ 33470 lb/yrMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ .4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ .4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ .4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ .7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ .7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ .7 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 1.4 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.4 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.4 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 9.2 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 9.2 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 9.2 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 17.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 17.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 17.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 15 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 15 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 15 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 29.2 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 29.2 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 29.2 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (lb/d)May–Oct001
Phosphorus, total [as P]monthly averagereport only (lb/d)May–Oct001
Phosphorus, total [as P]monthly averagereport only (lb/d)May–Oct001
Phosphorus, total [as P]rolling average≤ 1533 lb/yrMay–Oct001
Phosphorus, total [as P]rolling average≤ 1533 lb/yrMay–Oct001
Phosphorus, total [as P]rolling average≤ 1533 lb/yrMay–Oct001
Cyanide, total [as CN]monthly average≤ .00523 mg/Lall year001
Cyanide, total [as CN]monthly average≤ .00523 mg/Lall year001
Cyanide, total [as CN]monthly average≤ .00523 mg/Lall year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)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
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 941 #/100mLall year001
E. colidaily maximum≤ 941 #/100mLall year001
E. colidaily maximum≤ 941 #/100mLall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Dry Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
SSO, Wet Weathermonthly total≤ 0 occur/moall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 4 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 6 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 6 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 6 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 8 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 8 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 8 mg/Lall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83 lb/dall year001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 83 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 125 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 125 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 125 lb/dall year001
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year001
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year001
BOD, carbonaceous, percent removaldaily minimum≥ 40 %all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removaldaily minimum≥ 40 %all year001
Solids, suspended percent removaldaily minimum≥ 40 %all year001
Solids, suspended percent removaldaily minimum≥ 40 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended 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≥ 100 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum≥ 100 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum≥ 100 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum≥ 100 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum≥ 100 %all year001
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendedmonthly averagereport only (mg/L)all yearINF1
Solids, total suspendeddaily maximumreport only (mg/L)all yearINF1
Solids, total suspendeddaily maximumreport 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 plantmonthly averagereport only (MGD)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
Flow, in conduit or thru treatment plantdaily maximumreport 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]monthly averagereport only (mg/L)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
BOD, carbonaceous [5 day, 20 C]daily maximumreport 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/TN0020508 · MCP: https://passage-data.com/mcp