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Williamson, City of

Sewage treatment plant, major discharger, Williamson, West Virginia. NPDES permit WV0026271, in force until Apr 24, 2028. Last 12 months: over a limit 16 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 25 days after each period: outfall 001 form A monthly (27 values), outfall IU01 form A monthly (56 values), outfall IU09 form A monthly (22 values), outfall 001 form D yearly
Renewal application due
Oct 27, 2027 · 180 days before expiry; your permit may set another date
Last report on file
August 2026
Oct 2024 – Sep 2025
23 values over a limit, 0 required values missing, 0 of 27 reports late

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

All 16 values over a limit
Period endingOutfallParameterReportedLimitOver by
October 2025001Bromodichloromethane, effluent, daily maximum.0047 mg/L≤ .0016 mg/L194%
October 2025001Bromodichloromethane, effluent, monthly average.0047 mg/L≤ .001 mg/L370%
October 2025001Coliform, fecal general, daily maximum2420 #/100mL≤ 400 #/100mL505%
October 2025IU09Copper, total [as Cu], daily maximum1 mg/L< .05 mg/L1900%
November 2025001Bromodichloromethane, effluent, daily maximum.0026 mg/L≤ .0016 mg/L63%
November 2025001Bromodichloromethane, effluent, monthly average.0026 mg/L≤ .001 mg/L160%
December 2025001Bromodichloromethane, effluent, daily maximum.00336 mg/L≤ .0016 mg/L110%
December 2025001Bromodichloromethane, effluent, monthly average.00336 mg/L≤ .001 mg/L236%
January 2026001Bromodichloromethane, effluent, daily maximum.0017 mg/L≤ .0016 mg/L6%
January 2026001Bromodichloromethane, effluent, monthly average.0017 mg/L≤ .001 mg/L70%
January 2026001Cyanide, weak acid, dissociable, daily maximum.015 mg/L≤ .0058 mg/L159%
January 2026001Cyanide, weak acid, dissociable, monthly average.015 mg/L≤ .004 mg/L275%
February 2026001Cyanide, weak acid, dissociable, daily maximum.01 mg/L≤ .0058 mg/L72%
February 2026001Cyanide, weak acid, dissociable, monthly average.01 mg/L≤ .004 mg/L150%
July 2026001Coliform, fecal general, daily maximum579 #/100mL≤ 400 #/100mL45%
August 2026001BOD, 5-day, percent removal, monthly average minimum82 %≥ 85 %20%

Limits in force (127)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 60 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 260 lb/dall year001
BOD, 5-day, 20 deg. Cdaily maximum≤ 519 lb/dall year001
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendeddaily maximum≤ 60 mg/Lall year001
Solids, total suspendedmonthly average≤ 260 lb/dall year001
Solids, total suspendeddaily maximum≤ 519 lb/dall year001
Nitrogen, ammonia total [as N]monthly average≤ 11 mg/Lall year001
Nitrogen, ammonia total [as N]daily maximum≤ 22 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ 95 lb/dall year001
Nitrogen, ammonia total [as N]daily maximum≤ 190 lb/dall year001
Cyanide, weak acid, dissociablemonthly average≤ .004 mg/Lall year001
Cyanide, weak acid, dissociabledaily maximum≤ .0058 mg/Lall year001
Arsenic, total [as As]monthly averagereport only (mg/L)all year001
Arsenic, total [as As]daily maximumreport only (mg/L)all year001
Chromium, hexavalent [as Cr]monthly averagereport only (mg/L)all year001
Chromium, hexavalent [as Cr]daily maximumreport only (mg/L)all year001
Nickel, total recoverablemonthly averagereport only (mg/L)all year001
Nickel, total recoverabledaily maximumreport only (mg/L)all year001
Silver total recoverablemonthly averagereport only (mg/L)all year001
Silver total recoverabledaily maximumreport only (mg/L)all year001
Zinc, total recoverablemonthly averagereport only (mg/L)all year001
Zinc, total recoverabledaily maximumreport only (mg/L)all year001
Cadmium, total recoverablemonthly averagereport only (mg/L)all year001
Cadmium, total recoverabledaily maximumreport only (mg/L)all year001
Lead, total recoverablemonthly averagereport only (mg/L)all year001
Lead, total recoverabledaily maximumreport only (mg/L)all year001
Copper, total recoverablemonthly averagereport only (mg/L)all year001
Copper, total recoverabledaily maximumreport only (mg/L)all year001
Bromodichloromethane, effluentmonthly average≤ .001 mg/Lall year001
Bromodichloromethane, effluentdaily maximum≤ .0016 mg/Lall year001
Flow, in conduit or thru treatment plantminimumreport only (MGD)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≤ .028 mg/Lall year001
Chlorine, total residualdaily maximum≤ .057 mg/Lall year001
Toxicity [chronic], Ceriodaphnia dubiamonthly averagereport only (tox chronic)all year001
Toxicity [chronic], Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]monthly averagereport only (tox chronic)all year001
Toxicity [chronic], Pimephales promelas [Fathead Minnow]daily maximumreport only (tox chronic)all year001
Mercury, total [as Hg]monthly averagereport only (ug/L)all year001
Mercury, total [as Hg]daily maximumreport only (ug/L)all year001
Coliform, fecal generalmonthly geometric mean≤ 200 #/100mLall year001
Coliform, fecal generaldaily maximum≤ 400 #/100mLall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Flow ratemonthly averagereport only (gal/d)all yearIU01
Flow ratedaily maximum≤ 50000 gal/dall yearIU01
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all yearIU01
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all yearIU01
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all yearIU01
BOD, 5-day, 20 deg. Cdaily maximum≤ 50 lb/dall yearIU01
pHinstantaneous minimum≥ 5 SUall yearIU01
pHinstantaneous maximum≤ 10 SUall yearIU01
Solids, total suspendedmonthly averagereport only (mg/L)all yearIU01
Solids, total suspendeddaily maximumreport only (mg/L)all yearIU01
Solids, total suspendedmonthly averagereport only (lb/d)all yearIU01
Solids, total suspendeddaily maximum≤ 50 lb/dall yearIU01
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)all yearIU01
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)all yearIU01
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (lb/d)all yearIU01
Nitrogen, Kjeldahl, total [as N]daily maximum≤ 10 lb/dall yearIU01
Cyanide, total [as CN]monthly averagereport only (mg/L)all yearIU01
Cyanide, total [as CN]daily maximumreport only (mg/L)all yearIU01
Cyanide, total [as CN]monthly averagereport only (lb/d)all yearIU01
Cyanide, total [as CN]daily maximum≤ .009 lb/dall yearIU01
Arsenic, total [as As]monthly averagereport only (mg/L)all yearIU01
Arsenic, total [as As]daily maximumreport only (mg/L)all yearIU01
Arsenic, total [as As]monthly averagereport only (lb/d)all yearIU01
Arsenic, total [as As]daily maximum≤ .006 lb/dall yearIU01
Cadmium, total [as Cd]monthly averagereport only (mg/L)all yearIU01
Cadmium, total [as Cd]daily maximumreport only (mg/L)all yearIU01
Cadmium, total [as Cd]monthly averagereport only (lb/d)all yearIU01
Cadmium, total [as Cd]daily maximum≤ .0016 lb/dall yearIU01
Chromium, total [as Cr]monthly averagereport only (mg/L)all yearIU01
Chromium, total [as Cr]daily maximumreport only (mg/L)all yearIU01
Chromium, total [as Cr]monthly averagereport only (lb/d)all yearIU01
Chromium, total [as Cr]daily maximum≤ .02 lb/dall yearIU01
Copper, total [as Cu]monthly averagereport only (mg/L)all yearIU01
Copper, total [as Cu]daily maximumreport only (mg/L)all yearIU01
Copper, total [as Cu]monthly averagereport only (lb/d)all yearIU01
Copper, total [as Cu]daily maximum≤ .07 lb/dall yearIU01
Lead, total [as Pb]monthly averagereport only (mg/L)all yearIU01
Lead, total [as Pb]daily maximumreport only (mg/L)all yearIU01
Lead, total [as Pb]monthly averagereport only (lb/d)all yearIU01
Lead, total [as Pb]daily maximum≤ .01 lb/dall yearIU01
Nickel, total [as Ni]monthly averagereport only (mg/L)all yearIU01
Nickel, total [as Ni]daily maximumreport only (mg/L)all yearIU01
Nickel, total [as Ni]monthly averagereport only (lb/d)all yearIU01
Nickel, total [as Ni]daily maximum≤ .03 lb/dall yearIU01
Silver, total [as Ag]monthly averagereport only (mg/L)all yearIU01
Silver, total [as Ag]daily maximumreport only (mg/L)all yearIU01
Silver, total [as Ag]monthly averagereport only (lb/d)all yearIU01
Silver, total [as Ag]daily maximum≤ .01 lb/dall yearIU01
Zinc, total [as Zn]monthly averagereport only (mg/L)all yearIU01
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearIU01
Zinc, total [as Zn]monthly averagereport only (lb/d)all yearIU01
Zinc, total [as Zn]daily maximum≤ .07 lb/dall yearIU01
Mercury, total recoverablemonthly averagereport only (ug/L)all yearIU01
Mercury, total recoverabledaily maximumreport only (ug/L)all yearIU01
Mercury, total recoverablemonthly averagereport only (lb/d)all yearIU01
Mercury, total recoverabledaily maximum≤ .0001 lb/dall yearIU01
Flow ratemonthly averagereport only (gal/d)all yearIU09
Flow ratedaily maximum≤ 60000 gal/dall yearIU09
Solids, total suspendedmonthly averagereport only (mg/L)all yearIU09
Solids, total suspendeddaily maximum≤ 500 mg/Lall yearIU09
Solids, total suspendedmonthly averagereport only (lb/d)all yearIU09
Solids, total suspendeddaily maximumreport only (lb/d)all yearIU09
Copper, total [as Cu]monthly averagereport only (mg/L)all yearIU09
Copper, total [as Cu]daily maximum< .05 mg/Lall yearIU09
Copper, total [as Cu]monthly averagereport only (lb/d)all yearIU09
Copper, total [as Cu]daily maximumreport only (lb/d)all yearIU09
Iron, total [as Fe]monthly averagereport only (mg/L)all yearIU09
Iron, total [as Fe]daily maximumreport only (mg/L)all yearIU09
Iron, total [as Fe]monthly averagereport only (lb/d)all yearIU09
Iron, total [as Fe]daily maximumreport only (lb/d)all yearIU09
Zinc, total [as Zn]monthly averagereport only (mg/L)all yearIU09
Zinc, total [as Zn]daily maximumreport only (mg/L)all yearIU09
Zinc, total [as Zn]monthly averagereport only (lb/d)all yearIU09
Zinc, total [as Zn]daily maximumreport only (lb/d)all yearIU09
Aluminum, total [as Al]monthly averagereport only (mg/L)all yearIU09
Aluminum, total [as Al]daily maximumreport only (mg/L)all yearIU09
Aluminum, total [as Al]monthly averagereport only (lb/d)all yearIU09
Aluminum, total [as Al]daily maximumreport only (lb/d)all yearIU09

How strict are these limits?

Cited limits by parameter: West Virginia's rules and the federal ones.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WV0026271 · MCP: https://passage-data.com/mcp