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Mason, Town of

Sewage treatment plant, Mason, West Virginia. NPDES permit WV0021849, in force until Jul 11, 2027. Last 12 months: over a limit 40 times (last September 2026), 3 of 13 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form A monthly (24 values), form D yearly
Renewal application due
Jan 12, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
31 values over a limit, 0 required values missing, 0 of 13 reports late

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

All 40 values over a limit
Period endingParameterReportedLimitOver by
October 2025Coliform, fecal general, monthly geometric mean280 #/100mL≤ 200 #/100mL40%
December 2025Coliform, fecal general, daily maximum1539 #/100mL≤ 400 #/100mL285%
December 2025Coliform, fecal general, monthly geometric mean1539 #/100mL≤ 200 #/100mL670%
February 2026Coliform, fecal general, monthly geometric mean370 #/100mL≤ 200 #/100mL85%
March 2026Coliform, fecal general, daily maximum5700 #/100mL≤ 400 #/100mL1325%
March 2026Coliform, fecal general, monthly geometric mean5700 #/100mL≤ 200 #/100mL2750%
March 2026Nitrogen, ammonia total [as N], monthly average21.2 mg/L≤ 15 mg/L41%
April 2026Coliform, fecal general, monthly geometric mean220 #/100mL≤ 200 #/100mL10%
April 2026Nitrogen, ammonia total [as N], daily maximum35.9 mg/L≤ 30 mg/L20%
April 2026Nitrogen, ammonia total [as N], monthly average35.9 mg/L≤ 15 mg/L139%
May 2026BOD, 5-day, 20 deg. C, daily maximum139 lb/d≤ 125 lb/d11%
May 2026BOD, 5-day, 20 deg. C, monthly average139 lb/d≤ 62.5 lb/d122%
May 2026BOD, 5-day, 20 deg. C, monthly average55.8 mg/L≤ 30 mg/L86%
May 2026BOD, 5-day, percent removal, monthly average minimum56 %≥ 85 %193%
May 2026Coliform, fecal general, daily maximum6000 #/100mL≤ 400 #/100mL1400%
May 2026Coliform, fecal general, monthly geometric mean6000 #/100mL≤ 200 #/100mL2900%
May 2026Copper, total recoverable, monthly average.0316 mg/L≤ .022 mg/L44%
May 2026Nitrogen, ammonia total [as N], monthly average16.2 mg/L≤ 15 mg/L8%
May 2026Solids, suspended percent removal, monthly average minimum0 %≥ 85 %567%
May 2026Solids, total suspended, daily maximum156 lb/d≤ 125 lb/d25%
May 2026Solids, total suspended, daily maximum184 mg/L≤ 60 mg/L207%
May 2026Solids, total suspended, monthly average156 lb/d≤ 62.5 lb/d150%
May 2026Solids, total suspended, monthly average184 mg/L≤ 30 mg/L513%
June 2026BOD, 5-day, percent removal, monthly average minimum84 %≥ 85 %7%
June 2026Coliform, fecal general, daily maximum6000 #/100mL≤ 400 #/100mL1400%
June 2026Coliform, fecal general, monthly geometric mean6000 #/100mL≤ 200 #/100mL2900%
June 2026Nitrogen, ammonia total [as N], daily maximum30.7 mg/L≤ 30 mg/L2%
June 2026Nitrogen, ammonia total [as N], monthly average30.7 mg/L≤ 15 mg/L105%
July 2026Coliform, fecal general, daily maximum143000 #/100mL≤ 400 #/100mL35650%
July 2026Coliform, fecal general, monthly geometric mean143000 #/100mL≤ 200 #/100mL71400%
July 2026Nitrogen, ammonia total [as N], daily maximum49.7 mg/L≤ 30 mg/L66%
July 2026Nitrogen, ammonia total [as N], monthly average49.7 mg/L≤ 15 mg/L231%
August 2026Coliform, fecal general, daily maximum4100 #/100mL≤ 400 #/100mL925%
August 2026Coliform, fecal general, monthly geometric mean4100 #/100mL≤ 200 #/100mL1950%
September 2026Coliform, fecal general, daily maximum11300 #/100mL≤ 400 #/100mL2725%
September 2026Coliform, fecal general, monthly geometric mean11300 #/100mL≤ 200 #/100mL5550%
September 2026Nitrogen, ammonia total [as N], daily maximum163.7 lb/d≤ 62.6 lb/d162%
September 2026Nitrogen, ammonia total [as N], daily maximum34.5 mg/L≤ 30 mg/L15%
September 2026Nitrogen, ammonia total [as N], monthly average163.7 lb/d≤ 31.3 lb/d423%
September 2026Nitrogen, ammonia total [as N], monthly average34.5 mg/L≤ 15 mg/L130%

Limits in force (26)

ParameterStatisticLimitMonths
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 62.5 lb/dall year
BOD, 5-day, 20 deg. Cdaily maximum≤ 125 lb/dall year
pHinstantaneous minimum≥ 6 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 60 mg/Lall year
Solids, total suspendedmonthly average≤ 62.5 lb/dall year
Solids, total suspendeddaily maximum≤ 125 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 15 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 30 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 31.3 lb/dall year
Nitrogen, ammonia total [as N]daily maximum≤ 62.6 lb/dall year
Zinc, total recoverablemonthly average≤ .124 mg/Lall year
Zinc, total recoverabledaily maximum≤ .367 mg/Lall year
Lead, total recoverablemonthly averagereport only (mg/L)all year
Lead, total recoverabledaily maximumreport only (mg/L)all year
Copper, total recoverablemonthly average≤ .022 mg/Lall year
Copper, total recoverabledaily maximum≤ .041 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year
BOD, 5-day, 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: West Virginia'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/WV0021849 · MCP: https://passage-data.com/mcp