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Sinclair, Town of

Sewage treatment plant, Sinclair, Wyoming. NPDES permit WY0020397, in force until Apr 30, 2030. Last 12 months: no values over a limit, 4 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form MA yearly (8 values), form AA yearly
Last report on file
August 2026
Oct 2024 – Sep 2025
0 values over a limit, 54 required values missing, 9 of 13 reports late

Limits in force (35)

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
Durationmonthly totalreport only (d)all year
Chlorine, total residualdaily maximum≤ .011 mg/Lall year
Chlorine, total residualdaily maximum≤ .011 mg/Lall year
E. colimaximum monthly geometric mean≤ 126 MPN/100mLall year
E. colimonthly geometric mean≤ 630 MPN/100mLall year
E. colidaily maximum≤ 576 MPN/100mLall year
E. colidaily maximum≤ 630 MPN/100mLall year
Solids, total dissolveddaily maximumreport only (mg/L)all year
Flowmonthly averagereport only (MGD)all year
Flowmonthly averagereport only (MGD)all year
Flowdaily maximumreport only (MGD)all 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.

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/WY0020397 · MCP: https://passage-data.com/mcp