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Sewerage Systems, Garfield County, Colorado. NPDES permit CO0045802 expired Nov 30, 2019; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| 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 | ≤ 39 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 23 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 27 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 32 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 30 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 25 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 35 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 90 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 55 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 52 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 48 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 55 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 70 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 52 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 100 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 46 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 75 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 4 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 4.8 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 3.5 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 3.3 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 32 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 5.9 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 2.3 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 4.1 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 3.7 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 4.5 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 3.7 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 5.2 mg/L | Dec | 001 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 001 |
| Nitrogen, inorganic total | rolling average | report only (mg/L) | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .035 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .17 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .3 mg/L | all year | 001 |
| Chlorine, total residual | rolling average | ≤ .027 mg/L | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 1951 #/100mL | all year | 001 |
| E. coli | maximum 7-day geometric mean | ≤ 3902 #/100mL | all year | 001 |
| E. coli | rolling average | ≤ 401 #/100mL | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | 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 (abst=0;prst=1) | all year | 001 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| 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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