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Town of Mount Vernon

Sewage treatment plant, Mount Vernon, Alabama. NPDES permit AL0080225, in force until Dec 31, 2026. Last 12 months: over a limit 27 times (last August 2026), 14 required values missing, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form 2 monthly (42 values), form A yearly
Renewal application due
Jul 4, 2026 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
34 values over a limit, 0 required values missing, 0 of 13 reports late

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

All 27 values over a limit
Period endingParameterReportedLimitOver by
December 2025E. coli, daily maximumT≤ 2507 #/100mL—
December 2025E. coli, monthly average2080≤ 548 #/100mL280%
December 2025Nitrogen, ammonia total [as N], monthly average22.6≤ 20 mg/L13%
December 2025Nitrogen, ammonia total [as N], weekly average32≤ 30 mg/L7%
January 2026E. coli, daily maximumT≤ 2507 #/100mL—
January 2026E. coli, monthly averageT≤ 548 #/100mL—
January 2026Nitrogen, ammonia total [as N], monthly average21≤ 20 mg/L5%
February 2026BOD, carbonaceous [5 day, 20 C], weekly average39≤ 37.5 mg/L4%
February 2026E. coli, daily maximumT≤ 2507 #/100mL—
February 2026E. coli, monthly averageT≤ 548 #/100mL—
February 2026Nitrogen, ammonia total [as N], monthly average30≤ 20 mg/L50%
February 2026Nitrogen, ammonia total [as N], weekly average38≤ 30 mg/L27%
March 2026E. coli, daily maximumT≤ 2507 #/100mL—
March 2026E. coli, monthly average2112≤ 548 #/100mL285%
March 2026Nitrogen, ammonia total [as N], monthly average33≤ 20 mg/L65%
March 2026Nitrogen, ammonia total [as N], weekly average38≤ 30 mg/L27%
March 2026Oxygen, dissolved [DO], daily minimum2.61≥ 3 mg/L13%
April 2026E. coli, daily maximumT≤ 2507 #/100mL—
April 2026E. coli, monthly averageT≤ 548 #/100mL—
May 2026E. coli, daily maximumT≤ 298 #/100mL—
May 2026E. coli, monthly average1355≤ 126 #/100mL975%
May 2026pH, daily minimum4.24≥ 6 SU—
June 2026E. coli, daily maximumT≤ 298 #/100mL—
June 2026E. coli, monthly average556≤ 126 #/100mL341%
August 2026E. coli, daily maximum580≤ 298 #/100mL95%
August 2026E. coli, monthly average314≤ 126 #/100mL149%
August 2026Solids, suspended percent removal, monthly average minimum83.1≥ 85 %13%

Limits in force (46)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]daily minimum≥ 3 mg/Lall year
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendedmonthly average≤ 7.5 lb/dall year
Solids, total suspendedweekly average≤ 11.2 lb/dall year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedweekly averagereport only (lb/d)all year
Nitrogen, ammonia total [as N]monthly average≤ 20 mg/Lall year
Nitrogen, ammonia total [as N]weekly average≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 5 lb/dall year
Nitrogen, ammonia total [as N]weekly average≤ 7.5 lb/dall year
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (mg/L)Apr–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)Apr–Oct
Nitrogen, Kjeldahl, total [as N]weekly averagereport only (lb/d)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]weekly averagereport only (mg/L)Apr–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (lb/d)Apr–Oct
Nitrite + Nitrate total [as N]weekly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (mg/L)Apr–Oct
Phosphorus, total [as P]monthly averagereport only (lb/d)Apr–Oct
Phosphorus, total [as P]weekly averagereport only (lb/d)Apr–Oct
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualdaily maximum≤ 1 mg/Lall year
E. colimonthly average≤ 126 #/100mLMay–Oct
E. colimonthly average≤ 548 #/100mLJan, Feb, Mar, Apr, Nov, Dec
E. colidaily maximum≤ 298 #/100mLMay–Oct
E. colidaily maximum≤ 2507 #/100mLJan, Feb, Mar, Apr, Nov, Dec
Mercury, total recoverablemonthly averagereport only (ug/L)all year
Mercury, total recoverabledaily maximumreport only (ug/L)all year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 25 mg/Lall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 37.5 mg/Lall year
BOD, carbonaceous [5 day, 20 C]monthly average≤ 6.2 lb/dall year
BOD, carbonaceous [5 day, 20 C]weekly average≤ 9.3 lb/dall year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (mg/L)all year
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (lb/d)all year
BOD, carbonaceous [5 day, 20 C]weekly averagereport only (lb/d)all year
BOD, carb-5 day, 20 deg C, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

Cited limits by parameter: Alabama'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/AL0080225 · MCP: https://passage-data.com/mcp