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Mcdowell County PSD

Sewage treatment plant, Welch, West Virginia. NPDES permit WV0106241, in force until May 16, 2028. Last 12 months: over a limit 2 times (last December 2025). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: form B quarterly (22 values)
Renewal application due
Nov 18, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 4 reports late

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

Period endingParameterReportedLimitOver by
December 2025Chlorine, total residual, daily maximum.27 mg/L≤ .033 mg/L718%
December 2025Chlorine, total residual, monthly average.27 mg/L≤ .016 mg/L1588%

Limits in force (30)

ParameterStatisticLimitMonths
Oxygen, dissolved [DO]instantaneous minimum≥ 6 mg/Lall year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 40 mg/LMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 2.9 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 4.4 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 5.8 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 8.8 lb/dJan, Feb, Mar, Apr, Nov, Dec
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≤ 4.4 lb/dall year
Solids, total suspendeddaily maximum≤ 8.8 lb/dall year
Nitrogen, ammonia total [as N]monthly average≤ 3.5 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 7 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 7 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 14 mg/LJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ .5 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 1 lb/dJan, Feb, Mar, Apr, Nov, Dec
Nitrogen, ammonia total [as N]daily maximum≤ 1 lb/dMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 2 lb/dJan, Feb, Mar, Apr, Nov, Dec
Flow, in conduit or thru treatment plantminimumreport only (MGD)all 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
Chlorine, total residualmonthly average≤ .016 mg/Lall year
Chlorine, total residualdaily maximum≤ .033 mg/Lall year
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year
Coliform, fecal generaldaily maximum≤ 400 #/100mLall 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/WV0106241 · MCP: https://passage-data.com/mcp