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Dixon, Town of

Sewage treatment plant, (Unknown City), Wyoming. NPDES permit WY0021938, in force until Jun 30, 2030. Last 12 months: over a limit 6 times (last June 2026), 14 of 16 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form MQ quarterly (22 values), outfall 001 form QQ quarterly (2 values), outfall DMP1 form QQ quarterly (3 values), outfall 001 form AA yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
10 values over a limit, 71 required values missing, 14 of 18 reports late

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

Period endingParameterReportedLimitOver by
October 2025Chlorine, total residual, daily maximum.2 mg/L≤ .011 mg/L1718%
December 2025Chlorine, total residual, daily maximum.05 mg/L≤ .011 mg/L355%
May 2026Chlorine, total residual, daily maximum.012 mg/L≤ .011 mg/L9%
May 2026pH, instantaneous maximum9.03 SU≤ 9 SU—
June 2026Chlorine, total residual, daily maximum.02 mg/L≤ .011 mg/L82%
June 2026pH, instantaneous maximum9.43 SU≤ 9 SU—

Limits in force (35)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport 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. 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≤ 45 mg/Lall year001
Solids, total suspendedweekly average≤ 65 mg/Lall year001
Solids, total suspendeddaily maximumreport only (mg/L)all year001
Solids, total suspendedweekly averagereport only (mg/L)all year001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Nitrogen, ammonia total [as N]daily maximum≤ 59.04 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]monthly average≤ 4.35 mg/LMay–Sep001
Nitrogen, ammonia total [as N]weekly average≤ 26.76 mg/LJan, Feb, Mar, Apr, Oct, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximum≤ 21.58 mg/LMay–Sep001
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)all year001
Durationmonthly totalreport only (d/mo)all year001
Chlorine, total residualdaily maximum≤ .011 mg/Lall year001
E. colimonthly average≤ 630 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colimonthly average≤ 126 #/100mLMay–Sep001
E. colidaily maximum≤ 630 #/100mLJan, Feb, Mar, Apr, Oct, Nov, Dec001
E. colidaily maximum≤ 567 #/100mLMay–Sep001
Phosphorus, Totaldaily maximumreport only (mg/L)all year001
Solids, total dissolveddaily maximum≤ 500 mg/Lall year001
BOD, 5-day, percent removalmonthly average minimum≥ 65 %all year001
Solids, suspended percent removalmonthly average minimum≥ 65 %all year001
Flow, totaldaily maximum≤ .05 MGDall year001
Flow, totalmonthly averagereport only (MGD)all year001
Produced water, oil and greasedaily maximumreport only (mg/L)all 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/WY0021938 · MCP: https://passage-data.com/mcp