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City of Mount Pleasant

Sewage treatment plant, Mount Pleasant, Tennessee. NPDES permit TN0020800, in force until Nov 30, 2028. Last 12 months: over a limit 4 times (last January 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (45 values), outfall INF1 form G monthly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 1 of 24 reports late

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

Period endingParameterReportedLimitOver by
October 2025IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum35.4 %> 73 %52%
November 2025BOD, carbonaceous, percent removal, monthly average minimum83 %≥ 85 %13%
December 2025BOD, carbonaceous, percent removal, monthly average minimum82 %≥ 85 %20%
January 2026BOD, carbonaceous, percent removal, monthly average minimum84 %≥ 85 %7%

Limits in force (89)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 23.7 mg/Lall year001
Solids, total suspendedweekly average≤ 40 mg/Lall year001
Solids, total suspendedweekly average≤ 31.6 mg/Lall year001
Solids, total suspendeddaily maximum≤ 45 mg/Lall year001
Solids, total suspendeddaily maximum≤ 35.6 mg/Lall year001
Solids, total suspendedmonthly average≤ 178 lb/dall year001
Solids, total suspendedmonthly average≤ 178 lb/dall year001
Solids, total suspendedweekly average≤ 237 lb/dall year001
Solids, total suspendedweekly average≤ 237 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]rolling average≤ 12323 lb/yrall year001
Nitrogen, ammonia total [as N]monthly average≤ 1.25 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.79 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 1 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.2 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.87 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 4.18 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 1.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 3.3 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 5.6 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 2 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4.4 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.4 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 16.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 7.4 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 16.5 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 11 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 25 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 11 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 25 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≤ 2310 lb/yrall year001
Phosphorus, total [as P]rolling average≤ 2740 lb/yrall year001
Cyanide, total [as CN]monthly average≤ .00553 mg/Lall year001
Cadmium, total [as Cd]monthly averagereport only (mg/L)all year001
trans-1,2-Dichloroethylenemonthly averagereport only (mg/L)all year001
Naphthalenemonthly average≤ .001 mg/Lall year001
Di[2-ethylhexyl] phthalate [DEHP]monthly average≤ .006 mg/Lall year001
Phenolsmonthly averagereport 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 residualmonthly average≤ .02 mg/Lall year001
Chlorine, total residualdaily maximum≤ .03 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≤ 8 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6.3 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 15.7 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 12 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 25 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 9.5 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 19.7 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 16 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 12.5 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 23.5 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 47 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 118 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 47 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 118 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 71 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 148 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 71 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 148 lb/dJan, Feb, Mar, Apr, Nov, Dec001
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> 68 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum> 73 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 68 %all year001
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelasminimum> 73 %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/TN0020800 · MCP: https://passage-data.com/mcp