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City of Torrington

Sewage treatment plant, major discharger, Torrington, Wyoming. NPDES permit WY0020231, in force until Jul 31, 2029. Last 12 months: over a limit 3 times (last May 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form MM monthly (26 values), outfall DMP1 form MM monthly (3 values), outfall 001 form MA yearly, outfall 001 form SS twice a year
Last report on file
September 2026
Oct 2024 – Sep 2025
10 values over a limit, 0 required values missing, 3 of 27 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average58 mg/L≤ 30 mg/L93%
October 2025BOD, 5-day, 20 deg. C, weekly average58 mg/L≤ 45 mg/L29%
May 2026Nitrogen, ammonia total [as N], monthly average29.5 mg/L≤ 17.75 mg/L66%

Limits in force (44)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
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. Cweekly average≤ 45 mg/Lall 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. Cweekly averagereport only (mg/L)all year001
BOD, 5-day, 20 deg. Cdaily maximumreport only (mg/L)all year001
pHinstantaneous minimum≥ 6.5 SUall year001
pHinstantaneous maximum≤ 9 SUall year001
Solids, total suspendedmonthly average≤ 100 mg/Lall year001
Solids, total suspendedweekly average≤ 150 mg/Lall year001
Solids, total suspendeddaily maximum≤ 300 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, total [as N]daily maximumreport only (mg/L)all year001
Nitrogen, ammonia total [as N]monthly average≤ 17.75 mg/LMay–Sep001
Nitrogen, ammonia total [as N]monthly average≤ 34.74 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May–Sep001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)Jan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Phosphorus, total [as P]daily maximumreport only (mg/L)all year001
Arsenic, total [as As]daily maximumreport only (ug/L)all year001
Selenium, total [as Se]daily maximumreport only (ug/L)all year001
Phosphate, ortho [as P]daily maximumreport only (mg/L)all year001
Uranium, totaldaily maximumreport only (ug/L)all year001
Durationmonthly totalreport only (d)all year001
Chlorine, total residualdaily maximum≤ .21 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Chlorine, total residualdaily maximum≤ .2 mg/LMay–Sep001
E. colimonthly average≤ 11274 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly average≤ 1429 MPN/100mLMay–Sep001
E. colidaily maximum≤ 11274 MPN/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 9593 MPN/100mLMay–Sep001
Nitrogen, nitrate [NO3], [water]daily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Flowmonthly average≤ .95 MGDall year001
Flowdaily maximumreport only (MGD)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
Produced water, oil and greasedaily maximum≤ 10 mg/Lall year001
Temperature, water deg. centigradedaily averagereport 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.

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/WY0020231 · MCP: https://passage-data.com/mcp