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Manderson, Town of

Sewage treatment plant, (Unknown City), Wyoming. NPDES permit WY0052442, in force until Jan 31, 2029. Last 12 months: over a limit 15 times (last June 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form MQ quarterly (24 values), form MA yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
33 values over a limit, 0 required values missing, 7 of 13 reports late

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

All 15 values over a limit
Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, percent removal, monthly average minimum70.8 %≥ 85 %95%
November 2025BOD, 5-day, percent removal, monthly average minimum75.9 %≥ 85 %61%
November 2025E. coli, daily maximum2419 #/100mL≤ 630 #/100mL284%
November 2025Solids, suspended percent removal, monthly average minimum0 %≥ 85 %567%
November 2025Solids, total suspended, monthly average93 mg/L≤ 30 mg/L210%
November 2025Solids, total suspended, weekly average93 mg/L≤ 45 mg/L107%
December 2025BOD, 5-day, percent removal, monthly average minimum73.6 %≥ 85 %76%
December 2025E. coli, daily maximum1200 #/100mL≤ 630 #/100mL90%
December 2025Solids, suspended percent removal, monthly average minimum59.5 %≥ 85 %170%
January 2026Solids, suspended percent removal, monthly average minimum76.67 %≥ 85 %56%
February 2026E. coli, daily maximum13500 #/100mL≤ 630 #/100mL2043%
February 2026Solids, suspended percent removal, monthly average minimum79.67 %≥ 85 %36%
March 2026E. coli, daily maximum1120 #/100mL≤ 630 #/100mL78%
March 2026Solids, suspended percent removal, monthly average minimum58.63 %≥ 85 %176%
June 2026Solids, suspended percent removal, monthly average minimum40 %≥ 85 %300%

Limits in force (34)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/Lall year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/Lall year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 9 SUall year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendedweekly average≤ 45 mg/Lall year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly averagereport only (mg/L)all year
Solids, total suspendeddaily maximumreport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year
Phosphorus, total [as P]daily maximumreport only (mg/L)all year
Durationmonthly totalreport only (d)all year
Chlorine, total residualdaily maximum≤ 3.922 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Chlorine, total residualdaily maximum≤ .502 mg/LMay–Sep
Chlorine, total residualmonthly average≤ 2.27 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec
Chlorine, total residualmonthly average≤ .29 mg/LMay–Sep
E. coligeometric mean≤ 126 #/100mLMay–Sep
E. coligeometric mean≤ 630 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
E. colidaily maximum≤ 235 #/100mLMay–Sep
E. colidaily maximum≤ 630 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec
Solids, total dissolveddaily maximumreport only (mg/L)all year
Flowmonthly average≤ .02 MGDall year
Flowdaily maximumreport only (MGD)all year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year

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/WY0052442 · MCP: https://passage-data.com/mcp