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Collbran Town of

Sewage treatment plant, Collbran, Colorado. NPDES permit CO0040487 expired Sep 30, 2020; its limits still apply. Last 12 months: no values over a limit, 2 of 26 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 001 form A monthly (19 values), outfall 001 form Q quarterly (4 values), outfall 300 form I monthly (10 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 28 reports late

Limits in force (79)

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≤ 75 mg/Lall year001
Solids, total suspendeddaily maximum≤ 110 mg/Lall year001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 20.3 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 36.8 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 27 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 23 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LDec001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 20.3 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 24.8 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 20.3 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LJan001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LFeb001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LMar001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LApr001
Nitrogen, ammonia total [as N]30-day average≤ 37 mg/LMay001
Nitrogen, ammonia total [as N]30-day average≤ 21 mg/LJun001
Nitrogen, ammonia total [as N]30-day average≤ 16 mg/LJul001
Nitrogen, ammonia total [as N]30-day average≤ 17 mg/LAug001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LSep001
Nitrogen, ammonia total [as N]30-day average≤ 20 mg/LOct001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LNov001
Nitrogen, ammonia total [as N]30-day average≤ 25 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 275 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 96 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 100 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 59 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 198 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 61 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 51 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 95 mg/LDec001
Nitrogen, ammonia total [as N]daily maximum≤ 98 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 49 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 92 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 88 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LJan001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LFeb001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LMar001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LApr001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LMay001
Nitrogen, ammonia total [as N]daily maximum≤ 64 mg/LJun001
Nitrogen, ammonia total [as N]daily maximum≤ 52 mg/LJul001
Nitrogen, ammonia total [as N]daily maximum≤ 56 mg/LAug001
Nitrogen, ammonia total [as N]daily maximum≤ 51 mg/LSep001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LOct001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LNov001
Nitrogen, ammonia total [as N]daily maximum≤ 65 mg/LDec001
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year001
Flow, in conduit or thru treatment plant30-day average≤ .192 MGDall year001
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year001
Chlorine, total residual30-day averagereport only (mg/L)all year001
Chlorine, total residual30-day average≤ .09 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .41 mg/Lall year001
Chlorine, total residualinstantaneous maximum≤ .4 mg/Lall year001
E. coli30-day geometric mean≤ 1605 #/100mLall year001
E. colimaximum 7-day geometric mean≤ 3210 #/100mLall year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
Solids, total dissolved30-day averagereport only (mg/L)all year001
Solids, total dissolveddaily maximumreport only (mg/L)all year001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year001
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all 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/CO0040487 · MCP: https://passage-data.com/mcp