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Marbleton, Town of

Sewage treatment plant, Marbleton, Wyoming. NPDES permit WY0021997, in force until Jul 31, 2031. Last 12 months: over a limit 6 times (last September 2026), 7 required values missing, 3 of 36 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form MQ quarterly (46 values), outfall CRS1 form MQ quarterly (2 values), outfall DMP1 form MQ quarterly (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
18 values over a limit, 12 required values missing, 9 of 36 reports late

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

Period endingParameterReportedLimitOver by
February 2026BOD, 5-day, percent removal, monthly average minimum83 %≥ 85 %13%
May 2026BOD, 5-day, percent removal, monthly average minimum76 %≥ 85 %60%
June 2026Nitrogen, ammonia total [as N], monthly average1.09 mg/L≤ .96 mg/L14%
August 2026Nitrogen, ammonia total [as N], monthly average1.43 mg/L≤ .96 mg/L49%
September 2026Nitrogen, ammonia total [as N], daily maximum5.1 mg/L≤ 1.57 mg/L225%
September 2026Nitrogen, ammonia total [as N], monthly average5.1 mg/L≤ .54 mg/L844%

Limits in force (62)

ParameterStatisticLimitMonthsOutfall
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. 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 averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]monthly average≤ .71 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .71 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ .54 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ .54 mg/LMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 1.89 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 1.89 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 1.57 mg/LMay–Sep001
Nitrogen, ammonia total [as N]daily maximum≤ 1.57 mg/LMay–Sep001
Durationmonthly totalreport only (d/mo)all year001
Durationmonthly totalreport only (d/mo)all year001
Chlorine, total residualdaily maximum≤ .006 mg/Lall year001
Chlorine, total residualdaily maximum≤ .006 mg/Lall year001
Chlorine, total residualmonthly average≤ .04 mg/Lall year001
Chlorine, total residualmonthly average≤ .04 mg/Lall year001
E. colimonthly average≤ 54.6 #/100mLMay–Sep001
E. colimonthly average≤ 54.6 #/100mLMay–Sep001
E. colimonthly average≤ 218.9 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly average≤ 218.9 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 90.1 #/100mLMay–Sep001
E. colidaily maximum≤ 90.1 #/100mLMay–Sep001
E. colidaily maximum≤ 218.9 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 218.9 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
Solids, total dissolveddaily maximum≤ 400 mg/Lall year001
Solids, total dissolveddaily maximum≤ 400 mg/Lall year001
Flowmonthly average≤ .737 MGDall year001
Flowmonthly average≤ .737 MGDall year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Solids, total dissolveddaily maximumreport only (mg/L)all yearCRS1
Solids, total dissolveddaily maximumreport only (mg/L)all yearCRS1
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearDMP1
Temperature, water deg. centigradedaily maximumreport only (deg C)all yearDMP1
pHinstantaneous minimumreport only (SU)all yearDMP1
pHinstantaneous minimumreport only (SU)all yearDMP1
pHinstantaneous maximumreport 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/WY0021997 · MCP: https://passage-data.com/mcp