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Federal facility (Sewerage Systems), major discharger, Fort Carson, Colorado. NPDES permit CO0021181 expired Sep 30, 2016; its limits still apply. Last 12 months: no values over a limit, 1 of 11 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 45 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 454 kg/d | all year |
| BOD, 5-day, 20 deg. C | 7-day average | ≤ 681 kg/d | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year |
| BOD, 5-day, 20 deg. C | 7-day average | report only (mg/L) | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year |
| Solids, total suspended | 7-day average | ≤ 45 mg/L | all year |
| Solids, total suspended | 30-day average | ≤ 454 kg/d | all year |
| Solids, total suspended | 7-day average | ≤ 681 kg/d | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Solids, total suspended | 7-day average | report only (mg/L) | all year |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Jan |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Feb |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Mar |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.2 mg/L | Apr |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.4 mg/L | May |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Jun |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Jul |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Aug |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Sep |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8 mg/L | Oct |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Nov |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 10 mg/L | Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 14 mg/L | Jan |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21 mg/L | Feb |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22 mg/L | Apr |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 mg/L | May |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27 mg/L | Jul |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | Aug |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 mg/L | Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19 mg/L | Oct |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Nov |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Dec |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year |
| Copper, potentially dissolved | 30-day average | ≤ 16 ug/L | all year |
| Copper, potentially dissolved | daily maximum | ≤ 39 ug/L | all year |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year |
| Selenium, potentially dissolvd | 30-day average | ≤ 8 ug/L | all year |
| Selenium, potentially dissolvd | daily maximum | ≤ 19 ug/L | all year |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year |
| E. coli | 7-day geometric mean | ≤ 252 #/100mL | all year |
| Nonylphenol | daily maximum | report only (ug/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum % removal | ≥ 85 % | all year |
| Flow, total | 30-day average | ≤ 4 MGD | all year |
| Flow, total | daily maximum | report only (MGD) | all year |
| Oil and grease visual | instantaneous maximum | ≤ 0 N=0;Y=1 | all year |
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/CO0021181 · MCP: https://passage-data.com/mcp