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City of Maynardville

Sewage treatment plant, Maynardville, Tennessee. NPDES permit TN0022870, in force until Mar 31, 2028. Last 12 months: over a limit 10 times (last September 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form G monthly (35 values), outfall INF1 form G monthly (6 values)
Renewal application due
Oct 3, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
9 values over a limit, 0 required values missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
November 2025E. coli, daily maximum2419.6 #/100mL≤ 941 #/100mL157%
November 2025E. coli, monthly geometric mean145.44172 #/100mL≤ 126 #/100mL15%
December 2025E. coli, daily maximum2419.6 #/100mL≤ 941 #/100mL157%
February 2026SSO, Wet Weather, monthly total1 occur/mo≤ 0 occur/mo—
March 2026SSO, Dry Weather, monthly total2 occur/mo≤ 0 occur/mo—
April 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
June 2026SSO, Wet Weather, monthly total3 occur/mo≤ 0 occur/mo—
July 2026SSO, Dry Weather, monthly total1 occur/mo≤ 0 occur/mo—
July 2026SSO, Wet Weather, monthly total7 occur/mo≤ 0 occur/mo—
September 2026Nitrogen, ammonia total [as N], monthly average.97 mg/L≤ .86 mg/L13%

Limits in force (46)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]instantaneous minimum≥ 5 mg/Lall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 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≤ 150 lb/dall year001
Solids, total suspendedweekly average≤ 200 lb/dall year001
Solids, settleabledaily maximum≤ 1 mL/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (lb/d)all year001
Nitrogen, ammonia total [as N]monthly average≤ .86 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 1.69 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 2.85 mg/LMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 2.85 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LMay–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 3.8 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4.3 lb/dMay–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 8.4 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]weekly average≤ 14 lb/dMay–Oct001
Nitrogen, ammonia total [as N]weekly average≤ 14 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (lb/d)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≤ 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≤ 125 lb/dall year001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 175 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
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/TN0022870 · MCP: https://passage-data.com/mcp