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Electric Services, major discharger, Platteville, Colorado. NPDES permit CO0001121 expired Jul 31, 2013; its limits still apply. Last 12 months: over a limit once (last December 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| December 2025 | LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia, minimum value | 83 % | ≥ 100 % | 17% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum | ≤ 30 deg C | all year | 001 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 30 deg C | all year | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 64 mg/L | all year | 001 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 001 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | 30-day average | ≤ 180 ug/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ 180 ug/L | all year | 001 |
| Zinc, total [as Zn] | 30-day average | ≤ 890 ug/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 890 ug/L | all year | 001 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Oil and grease | 30-day average | ≤ 1.7 mg/L | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 4.8 mg/L | all year | 001 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 001 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | report only (#/100mL) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 2.4 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 | ≤ .22 mg/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ .24 mg/L | all year | 001 |
| Chlorine, free available | 30-day average | ≤ .18 mg/L | all year | 001 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | Jun, Dec | 001 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | Jun, Dec | 001 |
| Temperature, water deg. centigrade | maximum | ≤ 30 deg C | all year | 002 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 30 deg C | all year | 002 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | maximum | report only (deg C) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 64 mg/L | all year | 002 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 002 |
| Iron, total recoverable | 30-day average | ≤ 5436 ug/L | all year | 002 |
| Iron, total recoverable | 30-day average | ≤ 1000 ug/L | all year | 002 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Iron, total recoverable | daily maximum | report only (ug/L) | all year | 002 |
| Chromium, total [as Cr] | 30-day average | ≤ 180 ug/L | all year | 002 |
| Chromium, total [as Cr] | daily maximum | ≤ 180 ug/L | all year | 002 |
| Zinc, total [as Zn] | 30-day average | ≤ 890 ug/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ 890 ug/L | all year | 002 |
| Copper, potentially dissolved | 30-day average | ≤ 320 ug/L | all year | 002 |
| Copper, potentially dissolved | daily maximum | ≤ 386 ug/L | all year | 002 |
| Oil and grease | 30-day average | ≤ 1.7 mg/L | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 4.8 mg/L | all year | 002 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 002 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 002 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | report only (#/100mL) | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 2.4 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Chlorine, total residual | 30-day average | ≤ .3 mg/L | all year | 002 |
| Chlorine, total residual | 30-day average | ≤ .15 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .3 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ .16 mg/L | all year | 002 |
| Chlorine, free available | 30-day average | ≤ .18 mg/L | all year | 002 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 002 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| LC50 Static Renewal 48Hr Acute Ceriodaphnia dubia | minimum value | ≥ 100 % | Jun, Dec | 002 |
| LC50 Static Renewal 96Hr Acute Pimephales promelas | minimum value | ≥ 100 % | Jun, Dec | 002 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 007 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 007 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 007 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 007 |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 7.26 lb/d | all year | 007 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 007 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 007 |
| Solids, total suspended | 30-day average | ≤ 75 mg/L | all year | 007 |
| Solids, total suspended | maximum 7-day average | ≤ 110 mg/L | all year | 007 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 007 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | report only (#/100mL) | all year | 007 |
| E. coli, thermotol, MF, MTEC | 30-day geometric mean | ≤ 2000 #/100mL | all year | 007 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | report only (#/100mL) | all year | 007 |
| E. coli, thermotol, MF, MTEC | maximum 7-day geometric mean | ≤ 4000 #/100mL | all year | 007 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .029 MGD | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Chlorine, total residual | 30-day average | report only (mg/L) | all year | 007 |
| Chlorine, total residual | instantaneous maximum | report only (mg/L) | all year | 007 |
| Coliform, fecal general | 30-day geometric mean | ≤ 6000 #/100mL | all year | 007 |
| Coliform, fecal general | maximum 7-day geometric mean | ≤ 12000 #/100mL | all year | 007 |
| BOD, 5-day, percent removal | monthly average minimum | report only (%) | all year | 007 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 007 |
| Sulfate [as S] | 30-day average | report only (mg/L) | all year | MON |
| Sulfate [as S] | daily maximum | report only (mg/L) | all year | MON |
| Nitrogen, inorganic total | 30-day average | report only (mg/L) | all year | MON |
| Nitrogen, inorganic total | daily maximum | report only (mg/L) | all year | MON |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year | MON |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | MON |
| Arsenic, total [as As] | 30-day average | report only (ug/L) | all year | MON |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | MON |
| Iron, dissolved [as Fe] | 30-day average | report only (ug/L) | all year | MON |
| Iron, dissolved [as Fe] | daily maximum | report only (ug/L) | all year | MON |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | MON |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | MON |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | MON |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | MON |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 7 Electric Services permits in Colorado.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/CO0001121 · MCP: https://passage-data.com/mcp