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Sewage treatment plant, major discharger, Fremont County, Colorado. NPDES permit CO0039748 expired Feb 29, 2020; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 003 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 003 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 004 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.3 mg/L | Jun | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Aug | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | Sep | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.4 mg/L | Jul | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.1 mg/L | Jan | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.9 mg/L | Mar | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.9 mg/L | Oct | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.2 mg/L | Feb | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.1 mg/L | Nov | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.7 mg/L | May | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4 mg/L | Apr | 004 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.3 mg/L | Dec | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 36 mg/L | Jun | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35 mg/L | Aug | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 32 mg/L | Sep | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Jul | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 29 mg/L | Jan | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Mar | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Oct | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34 mg/L | Feb | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 37 mg/L | Nov | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25 mg/L | May | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 mg/L | Apr | 004 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 33 mg/L | Dec | 004 |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, inorganic total | rolling average | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | aggregate rolling median | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | aggregate rolling median | ≤ 3.2 mg/L | all year | 004 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 004 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 004 |
| Silver, potentially dissolved | rolling average | ≤ 2.9 ug/L | all year | 004 |
| Selenium, potentially dissolvd | 30-day average | ≤ 9.8 ug/L | all year | 004 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 004 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 004 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 8.5 MGD | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 004 |
| Chlorine, total residual | 30-day average | ≤ .03 mg/L | all year | 004 |
| Chlorine, total residual | instantaneous maximum | ≤ .19 mg/L | all year | 004 |
| E. coli | 30-day geometric mean | ≤ 624 #/100mL | all year | 004 |
| E. coli | maximum 7-day geometric mean | ≤ 1248 #/100mL | all year | 004 |
| Nitrogen, Total As N | aggregate rolling median | ≤ 45 mg/L | all year | 004 |
| Nonylphenol | 30-day average | report only (ug/L) | all year | 004 |
| Nonylphenol | daily maximum | report only (ug/L) | all year | 004 |
| Nonylphenol | rolling average | report only (ug/L) | all year | 004 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 004 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 004 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 004 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | all year | 004 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | all year | 004 |
| 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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CO0039748 · MCP: https://passage-data.com/mcp