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Sewage treatment plant, Otero County, Colorado. NPDES permit CO0039519 expired May 31, 2019; its limits still apply. Last 12 months: over a limit 28 times (last August 2026), 2 required values missing, 2 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| November 2025 | BOD, 5-day, 20 deg. C, 30-day average | 30.3 mg/L | ≤ 30 mg/L | 1% |
| November 2025 | BOD, 5-day, percent removal, monthly average minimum | 81 % | ≥ 85 % | 27% |
| November 2025 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| November 2025 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 4000 #/100mL | — |
| December 2025 | Chlorine, total residual, instantaneous maximum | .52 mg/L | ≤ .5 mg/L | 4% |
| December 2025 | Nitrogen, ammonia total [as N], 30-day average | 50.2 mg/L | ≤ 40 mg/L | 26% |
| December 2025 | Nitrogen, ammonia total [as N], daily maximum | 50.2 mg/L | ≤ 50 mg/L | 0% |
| January 2026 | Nitrogen, ammonia total [as N], 30-day average | 52.1 mg/L | ≤ 39 mg/L | 34% |
| January 2026 | Nitrogen, ammonia total [as N], daily maximum | 52.1 mg/L | ≤ 50 mg/L | 4% |
| February 2026 | Nitrogen, ammonia total [as N], 30-day average | 52.31 mg/L | ≤ 32 mg/L | 63% |
| February 2026 | Nitrogen, ammonia total [as N], daily maximum | 52.1 mg/L | ≤ 50 mg/L | 4% |
| March 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| March 2026 | Nitrogen, ammonia total [as N], 30-day average | 48.4 mg/L | ≤ 36 mg/L | 34% |
| April 2026 | BOD, 5-day, percent removal, monthly average minimum | 71 % | ≥ 85 % | 93% |
| April 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| April 2026 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 4000 #/100mL | — |
| April 2026 | Nitrogen, ammonia total [as N], 30-day average | 49.8 mg/L | ≤ 36 mg/L | 38% |
| May 2026 | BOD, 5-day, percent removal, monthly average minimum | 82 % | ≥ 85 % | 20% |
| May 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| May 2026 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 4000 #/100mL | — |
| May 2026 | Nitrogen, ammonia total [as N], 30-day average | 46.7 mg/L | ≤ 32 mg/L | 46% |
| June 2026 | BOD, 5-day, 20 deg. C, 30-day average | 44 mg/L | ≤ 30 mg/L | 47% |
| June 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| June 2026 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 4000 #/100mL | — |
| July 2026 | BOD, 5-day, percent removal, monthly average minimum | 76 % | ≥ 85 % | 60% |
| August 2026 | BOD, 5-day, percent removal, monthly average minimum | 83 % | ≥ 85 % | 13% |
| August 2026 | E. coli, 30-day geometric mean | > 2419.6 #/100mL | ≤ 2000 #/100mL | — |
| August 2026 | E. coli, maximum 7-day geometric mean | > 2419.6 #/100mL | ≤ 4000 #/100mL | — |
| 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 | ≤ 75 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) | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | May | 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) | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Oct | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | report only (mg/L) | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 39 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 | ≤ 36 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 36 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 32 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 46 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 | ≤ 40 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 45 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 | ≤ 39 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 40 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Dec | 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 |
| 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 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .0625 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 | ≤ .5 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .5 mg/L | all year | 001 |
| E. coli | 30-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli | 30-day geometric mean | ≤ 2000 #/100mL | all year | 001 |
| E. coli | maximum 7-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli | maximum 7-day geometric mean | ≤ 4000 #/100mL | all year | 001 |
| Coliform, fecal general | 30-day geometric mean | ≤ 6000 #/100mL | all year | 001 |
| Coliform, fecal general | maximum 7-day geometric mean | ≤ 12000 #/100mL | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=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/CO0039519 · MCP: https://passage-data.com/mcp