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Hudson, Town of

Sewage treatment plant, (Unknown City), Wyoming. NPDES permit WY0020664, in force until Nov 30, 2028. Last 12 months: over a limit once (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form MQ quarterly (38 values), outfall 001 form QQ quarterly (6 values), outfall DMP1 form QQ quarterly (3 values)
Last report on file
June 2026
Oct 2024 – Sep 2025
4 values over a limit, 0 required values missing, 0 of 20 reports late

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

Period endingParameterReportedLimitOver by
March 2026BOD, 5-day, percent removal, monthly average minimum0 %≥ 65 %186%

Limits in force (53)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 100 mg/Lall year001
Solids, total suspendedmonthly average≤ 100 mg/Lall year001
Solids, total suspendedweekly average≤ 150 mg/Lall year001
Solids, total suspendedweekly average≤ 150 mg/Lall year001
Solids, total suspendeddaily maximum≤ 300 mg/Lall year001
Solids, total suspendeddaily maximum≤ 300 mg/Lall year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Phosphate, ortho [as P]daily maximumreport only (mg/L)all year001
Durationmonthly totalreport only (d)all year001
Durationmonthly totalreport only (d)all year001
Chlorine, total residualdaily maximum≤ .62 mg/LMay–Sep001
Chlorine, total residualdaily maximum≤ .62 mg/LMay–Sep001
Chlorine, total residualdaily maximum≤ .74 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Chlorine, total residualdaily maximum≤ .74 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly geometric mean≤ 38473 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly geometric mean≤ 38473 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly geometric mean≤ 5239 #/100mLMay–Sep001
E. colimonthly geometric mean≤ 5239 #/100mLMay–Sep001
E. colidaily maximum≤ 38473 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 38473 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 30974 #/100mLMay–Sep001
E. colidaily maximum≤ 30974 #/100mLMay–Sep001
Nitrogen, Ammonia Totaldaily maximumreport only (mg/L)all year001
Flowmonthly average≤ .28 MGDall year001
Flowmonthly average≤ .28 MGDall year001
Flowdaily maximumreport only (MGD)all year001
Flowdaily maximumreport only (MGD)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Produced water, oil and greasedaily maximum= 10 mg/Lall year001
Produced water, oil and greasedaily maximum= 10 mg/Lall year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearDMP1
pHinstantaneous minimumreport only (SU)all yearDMP1
pHinstantaneous maximumreport only (SU)all yearDMP1

How strict are these limits?

Cited limits by parameter: Wyoming'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/WY0020664 · MCP: https://passage-data.com/mcp