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Sewage treatment plant, Morrison, Colorado. NPDES permit CO0041432 expired Oct 31, 2014; its limits still apply. Last 12 months: no values over a limit, 6 of 33 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 13 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.8 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.7 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 12 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 11 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.6 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.2 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.7 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 31 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 40 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 30 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 32 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22 mg/L | Dec | 001 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 mg/L | all year | 001 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 001 |
| Phosphorus, total [as P] | annual total | ≤ 600 lb/yr | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | ≤ 169 #/100mL | all year | 001 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | ≤ 338 #/100mL | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .2 MGD | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .018 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .025 mg/L | all year | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 4806 #/100mL | all year | 001 |
| Coliform, fecal general | maximum 7-day geometric mean | ≤ 9612 #/100mL | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30 mg/L | Jun | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 24 mg/L | Aug | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30 mg/L | Sep | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 28 mg/L | Mar | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 19 mg/L | Jul | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 39 mg/L | Jan | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27 mg/L | Feb | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Oct | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 39 mg/L | Nov | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 40 mg/L | May | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Apr | 002 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30 mg/L | Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Feb | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 41 mg/L | Apr | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 002 |
| Phosphorus, total [as P] | 30-day average | ≤ 1 mg/L | all year | 002 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 002 |
| Phosphorus, total [as P] | annual total | ≤ 600 lb/yr | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 002 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | report only (#/100mL) | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .2 MGD | all year | 002 |
| Chlorine, total residual | instantaneous maximum | ≤ .074 mg/L | all year | 002 |
| Coliform, fecal general | 30-day geometric mean | ≤ 6000 #/100mL | all year | 002 |
| Coliform, fecal general | maximum 7-day geometric mean | ≤ 12000 #/100mL | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (lb/d) | all year | 300 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 300 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 300 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 300 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 300 |
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/CO0041432 · MCP: https://passage-data.com/mcp