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Sewage treatment plant, Lake City, Colorado. NPDES permit CO0040673 expired Dec 31, 2023; its limits still apply. Last 12 months: over a limit 13 times (last August 2026), 1 of 25 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, 30-day average | 38 mg/L | ≤ 30 mg/L | 27% |
| October 2025 | Solids, total suspended, 30-day average | 114 mg/L | ≤ 75 mg/L | 52% |
| October 2025 | Solids, total suspended, maximum 7-day average | 114 mg/L | ≤ 110 mg/L | 4% |
| December 2025 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 1571 #/100mL | — |
| December 2025 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 3142 #/100mL | — |
| January 2026 | Nitrogen, ammonia total [as N], 30-day average | 36.3 mg/L | ≤ 15 mg/L | 142% |
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 44.2 mg/L | ≤ 16 mg/L | 176% |
| March 2026 | Nitrogen, ammonia total [as N], 30-day average | 40.2 mg/L | ≤ 18 mg/L | 123% |
| July 2026 | BOD, 5-day, 20 deg. C, 30-day average | 53 mg/L | ≤ 30 mg/L | 77% |
| July 2026 | BOD, 5-day, 20 deg. C, daily maximum | 53 mg/L | ≤ 45 mg/L | 18% |
| July 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 1571 #/100mL | — |
| July 2026 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 3142 #/100mL | — |
| August 2026 | Solids, total suspended, 30-day average | 88 mg/L | ≤ 75 mg/L | 17% |
| 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 | daily maximum | ≤ 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 | ≤ 75 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 75 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 110 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 110 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 28 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 60 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 45 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 35 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 61 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 60 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 22 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 15 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 16 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 18 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 50 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 41 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 43 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 64 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 64 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 50 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 27 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 31 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | rolling average | ≤ 61 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Jul | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Jul | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Oct | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | rolling average | report only (mg/L) | Dec | 001 |
| Nitrogen, inorganic total | daily maximum | ≤ 100 mg/L | all year | 001 |
| Nitrogen, inorganic total | rolling average | report only (mg/L) | all year | 001 |
| Nitrogen, inorganic total | rolling average | ≤ 65 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 | ≤ .225 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .275 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (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 | ≤ .36 mg/L | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .2 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .5 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .5 mg/L | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 1920 #/100mL | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 1571 #/100mL | all year | 001 |
| E. coli | maximum 7-day geometric mean | ≤ 3840 #/100mL | all year | 001 |
| E. coli | maximum 7-day geometric mean | ≤ 3142 #/100mL | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 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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Your permit document is the final word. As JSON: /api/v1/permits/CO0040673 · MCP: https://passage-data.com/mcp