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Wellington Town of

Sewage treatment plant, Wellington, Colorado. NPDES permit CO0046451 expired May 31, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (26 values), outfall 001 form X quarterly (6 values), outfall 300 form I monthly (10 values)
Last report on file
August 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 28 reports late

Limits in force (84)

ParameterStatisticLimitMonthsOutfall
BOD, 5-day, 20 deg. C30-day average≤ 30 mg/Lall year001
BOD, 5-day, 20 deg. Cmaximum 7-day average≤ 45 mg/Lall year001
pHminimum≥ 6.5 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspended30-day average≤ 30 mg/Lall year001
Solids, total suspendedmaximum 7-day average≤ 45 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 3.3 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 3.5 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 4.1 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 2.6 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 2.3 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 2.8 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 1.9 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 3.7 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 3.3 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 3.2 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 2.1 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 16 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 18 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 17 mg/LOct001
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year001
Selenium, potentially dissolvd30-day average≤ 6.3 ug/Lall year001
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year001
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .9 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day average≤ .006 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .019 mg/Lall year001
E. coli30-day geometric mean≤ 630 #/100mLJan, Feb, Mar, Oct, Nov, Dec001
E. coli30-day geometric mean≤ 205 #/100mLJun–Aug001
E. coli30-day geometric mean≤ 163 #/100mLJun–Aug001
E. coli30-day geometric mean≤ 163 #/100mLJan, Feb, Mar, Oct, Nov, Dec001
E. colimaximum 7-day geometric mean≤ 1260 #/100mLJan, Feb, Mar, Oct, Nov, Dec001
E. colimaximum 7-day geometric mean≤ 410 #/100mLJun–Aug001
E. colimaximum 7-day geometric mean≤ 410 #/100mLJun–Aug001
E. colimaximum 7-day geometric mean≤ 1260 #/100mLJan, Feb, Mar, Oct, Nov, Dec001
E. coli30-day geometric mean≤ 630 #/100mLMay001
E. coli30-day geometric mean≤ 163 #/100mLMay001
E. colimaximum 7-day average≤ 1260 #/100mLMay001
E. colimaximum 7-day geometric mean≤ 1260 #/100mLMay001
E. coli30-day geometric mean≤ 205 #/100mLMay001
E. coli30-day geometric mean≤ 163 #/100mLMay001
E. colimaximum 7-day average≤ 410 #/100mLMay001
E. colimaximum 7-day geometric mean≤ 410 #/100mLMay001
E. coli30-day geometric mean≤ 205 #/100mLSep001
E. coli30-day geometric mean≤ 163 #/100mLSep001
E. colimaximum 7-day average≤ 410 #/100mLSep001
E. colimaximum 7-day geometric mean≤ 410 #/100mLSep001
E. coli30-day geometric mean≤ 630 #/100mLSep001
E. coli30-day geometric mean≤ 163 #/100mLSep001
E. colimaximum 7-day average≤ 1260 #/100mLSep001
E. colimaximum 7-day geometric mean≤ 1260 #/100mLSep001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year001
Static Renewal 7 Day Chronic Ceriodaphnia dubiasingle samplereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum valuereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum valuereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum value≥ 100 tox chronicall year001
Static Renewal 7 Day Chronic Pimephales promelassingle samplereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Pimephales promelasminimum valuereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Pimephales promelasminimum valuereport only (tox chronic)all year001
Static Renewal 7 Day Chronic Pimephales promelasminimum value≥ 100 tox chronicall year001
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
Plant capacity fact. percent of capacity30-day averagereport only (%)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (mg/L)all year300
BOD, 5-day, 20 deg. C30-day averagereport only (lb/d)all year300
BOD, 5-day, 20 deg. Cmaximum 7-day averagereport only (lb/d)all year300
Solids, total suspended30-day averagereport only (mg/L)all year300
Solids, total suspendedmaximum 7-day averagereport only (mg/L)all year300
Flow, in conduit or thru treatment plant30-day averagereport only (MGD)all year300
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year300

How strict are these limits?

Cited limits by parameter: Colorado'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/CO0046451 · MCP: https://passage-data.com/mcp