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Crude Petroleum And Natural Gas, Iles Grove, Colorado. NPDES permit CO0000051 expired Dec 31, 2024; its limits still apply. Last 12 months: no values over a limit, 1 of 18 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Temperature, water deg. centigrade | maximum weekly average | ≤ 13.8 deg C | Jan, Feb, Dec |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 27.5 deg C | Mar–Nov |
| Temperature, water deg. centigrade | daily maximum | ≤ 25.2 deg C | Jan, Feb, Dec |
| Temperature, water deg. centigrade | daily maximum | ≤ 28.6 deg C | Mar–Nov |
| Conductivity | 30-day average | report only (dS/m) | all year |
| Conductivity | daily maximum | report only (dS/m) | all year |
| Oxygen, dissolved [DO] | 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 | maximum 7-day average | ≤ 45 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 | maximum 7-day average | ≤ 45 mg/L | all year |
| Nitrogen, nitrite total [as N] | daily maximum | ≤ .05 mg/L | all year |
| Nitrogen, nitrate total [as N] | daily maximum | report only (mg/L) | all year |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year |
| Chloride [as Cl] | 30-day average | report only (mg/L) | all year |
| Arsenic, total recoverable | 30-day average | ≤ 5.9 ug/L | all year |
| Arsenic, total recoverable | 30-day average | ≤ 2.4 ug/L | all year |
| Arsenic, total recoverable | 30-day average | ≤ .02 ug/L | all year |
| Iron, total recoverable | 30-day average | ≤ 602 ug/L | all year |
| Manganese, dissolved [as Mn] | 30-day average | report only (ug/L) | all year |
| Manganese, dissolved [as Mn] | daily maximum | report only (ug/L) | all year |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year |
| Cadmium, total recoverable | daily maximum | report only (ug/L) | all year |
| Lead, total recoverable | daily maximum | report only (ug/L) | all year |
| Molybdenum, total recoverable | 30-day average | report only (ug/L) | all year |
| Molybdenum, total recoverable | daily maximum | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year |
| Zinc, potentially dissolved | 30-day average | ≤ 106 ug/L | all year |
| Zinc, potentially dissolved | 30-day average | ≤ 174 ug/L | all year |
| Zinc, potentially dissolved | daily maximum | ≤ 467 ug/L | all year |
| Zinc, potentially dissolved | daily maximum | ≤ 230 ug/L | all year |
| Silver, potentially dissolved | 30-day average | ≤ .27 ug/L | all year |
| Silver, potentially dissolved | daily maximum | ≤ 4 ug/L | all year |
| Copper, potentially dissolved | 30-day average | ≤ 29 ug/L | all year |
| Copper, potentially dissolved | 30-day average | ≤ 13 ug/L | all year |
| Copper, potentially dissolved | daily maximum | ≤ 50 ug/L | all year |
| Copper, potentially dissolved | daily maximum | ≤ 20 ug/L | all year |
| Cadmium, potentially dissolvd | 30-day average | ≤ .43 ug/L | all year |
| Cadmium, potentially dissolvd | daily maximum | ≤ 3.9 ug/L | all year |
| Lead, potentially dissolvd | 30-day average | ≤ 3.9 ug/L | all year |
| Lead, potentially dissolvd | daily maximum | ≤ 99 ug/L | all year |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year |
| Selenium, potentially dissolvd | 30-day average | ≤ 4.6 ug/L | all year |
| Selenium, potentially dissolvd | daily maximum | ≤ 18.4 ug/L | all year |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year |
| Oil and grease | instantaneous maximum | ≤ 35 mg/L | all year |
| Radium 226 + radium 228, total | 30-day average | ≤ 4.21 pCi/L | all year |
| Uranium, total | 30-day average | report only (ug/L) | all year |
| Toluene | 30-day average | report only (ug/L) | all year |
| Toluene | daily maximum | report only (ug/L) | all year |
| Toluene | rolling average | report only (ug/L) | all year |
| Benzene | 30-day average | ≤ 2.2 ug/L | all year |
| Acenaphthene | 30-day average | ≤ 420 ug/L | all year |
| Acenaphthene | daily maximum | ≤ 1700 ug/L | all year |
| Acenaphthene | rolling average | ≤ 63 ug/L | all year |
| Anthracene | 30-day average | ≤ 2100 ug/L | all year |
| Anthracene | daily maximum | ≤ 5300 ug/L | all year |
| Anthracene | rolling average | ≤ 315 ug/L | all year |
| Benzo[b]fluoranthene | 30-day average | ≤ .0038 ug/L | all year |
| Benzo[k]fluoranthene | 30-day average | ≤ .0038 ug/L | all year |
| Benzo[a]pyrene | 30-day average | ≤ .0038 ug/L | all year |
| Chrysene | 30-day average | ≤ .0038 ug/L | all year |
| Ethylbenzene | 30-day average | report only (ug/L) | all year |
| Ethylbenzene | daily maximum | report only (ug/L) | all year |
| Ethylbenzene | rolling average | report only (ug/L) | all year |
| Indeno[1,2,3-cd]pyrene | 30-day average | ≤ .0038 ug/L | all year |
| Pyrene | 30-day average | report only (ug/L) | all year |
| Pyrene | rolling average | report only (ug/L) | all year |
| Benzo[ghi]perylene | 30-day average | ≤ .0038 ug/L | all year |
| Benzo[a]anthracene | 30-day average | ≤ .0038 ug/L | all year |
| Dibenz[a,h]anthracene | 30-day average | ≤ .0038 ug/L | all year |
| Naphthalene | 30-day average | report only (ug/L) | all year |
| Naphthalene | daily maximum | report only (ug/L) | all year |
| Naphthalene | rolling average | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .97 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| Mercury, total [low level] | 30-day average | ≤ .011 ug/L | all year |
| Acrylamide | 30-day average | report only (ug/L) | all year |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year |
| Solids, total dissolved | 30-day average | ≤ 3500 mg/L | all year |
| Xylenes [total], dry weight | 30-day average | report only (ug/L) | all year |
| Xylenes [total], dry weight | rolling average | report only (ug/L) | all year |
| Quinoline | 30-day average | ≤ .12 ug/L | all year |
| Sulfate | 30-day average | report only (ug/L) | all year |
| Boron, total | 30-day average | report only (mg/L) | all year |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 100 tox chronic | all year |
| Static Renewal 7 Day Chronic Pimephales promelas | single sample | report only (tox chronic) | all year |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | report only (tox chronic) | all year |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | ≥ 100 tox chronic | all year |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 8 Oil and Gas Extraction 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/CO0000051 · MCP: https://passage-data.com/mcp