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Uranium-Radium-Vanadium Ores, Naturita, Colorado. NPDES permit CO0036251 expired May 31, 2016; its limits still apply. Last 12 months: no values over a limit, 15 of 80 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen demand, chem. [high level] [COD] | 30-day average | ≤ 100 mg/L | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 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 | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 001 |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Radium 226, total | 30-day average | report only (pCi/L) | all year | 001 |
| Radium 226, total | daily maximum | ≤ 30 pCi/L | all year | 001 |
| Radium 226, dissolved | 30-day average | ≤ 3 pCi/L | all year | 001 |
| Radium 226, dissolved | daily maximum | ≤ 10 pCi/L | all year | 001 |
| Radium 226 + radium 228, total | 30-day average | ≤ 5 pCi/L | all year | 001 |
| Radium 226 + radium 228, total | daily maximum | report only (pCi/L) | all year | 001 |
| Uranium, total | 30-day average | ≤ 2000 ug/L | all year | 001 |
| Uranium, total | daily maximum | ≤ 4000 ug/L | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .2 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001 |
| Oxygen demand, chem. [high level] [COD] | 30-day average | ≤ 100 mg/L | all year | 001B |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 mg/L | all year | 001B |
| pH | minimum | ≥ 6.5 SU | all year | 001B |
| pH | maximum | ≤ 9 SU | all year | 001B |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 001B |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001B |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 001B |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 001B |
| Radium 226, total | 30-day average | report only (pCi/L) | all year | 001B |
| Radium 226, total | daily maximum | ≤ 30 pCi/L | all year | 001B |
| Radium 226, dissolved | 30-day average | ≤ 3 pCi/L | all year | 001B |
| Radium 226, dissolved | daily maximum | ≤ 10 pCi/L | all year | 001B |
| Radium 226 + radium 228, total | 30-day average | ≤ 5 pCi/L | all year | 001B |
| Radium 226 + radium 228, total | daily maximum | report only (pCi/L) | all year | 001B |
| Uranium, total | 30-day average | ≤ 2000 ug/L | all year | 001B |
| Uranium, total | daily maximum | ≤ 4000 ug/L | all year | 001B |
| Rainfall | 30-day average | report only (in) | all year | 001B |
| Rainfall | daily maximum | report only (in) | all year | 001B |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 001B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001B |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 001B |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 001B |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 001B |
| Oxygen demand, chem. [high level] [COD] | 30-day average | ≤ 100 mg/L | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 mg/L | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002 |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 002 |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 002 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 002 |
| Radium 226, total | 30-day average | report only (pCi/L) | all year | 002 |
| Radium 226, total | daily maximum | ≤ 30 pCi/L | all year | 002 |
| Radium 226, dissolved | 30-day average | ≤ 3 pCi/L | all year | 002 |
| Radium 226, dissolved | daily maximum | ≤ 10 pCi/L | all year | 002 |
| Radium 226 + radium 228, total | 30-day average | ≤ 5 pCi/L | all year | 002 |
| Radium 226 + radium 228, total | daily maximum | report only (pCi/L) | all year | 002 |
| Uranium, total | 30-day average | ≤ 2000 ug/L | all year | 002 |
| Uranium, total | daily maximum | ≤ 4000 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .3 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002 |
| Oxygen demand, chem. [high level] [COD] | 30-day average | ≤ 100 mg/L | all year | 002B |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 mg/L | all year | 002B |
| pH | minimum | ≥ 6.5 SU | all year | 002B |
| pH | maximum | ≤ 9 SU | all year | 002B |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 002B |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002B |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 002B |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 002B |
| Radium 226, total | 30-day average | report only (pCi/L) | all year | 002B |
| Radium 226, total | daily maximum | ≤ 30 pCi/L | all year | 002B |
| Radium 226, dissolved | 30-day average | ≤ 3 pCi/L | all year | 002B |
| Radium 226, dissolved | daily maximum | ≤ 10 pCi/L | all year | 002B |
| Radium 226 + radium 228, total | 30-day average | ≤ 5 pCi/L | all year | 002B |
| Radium 226 + radium 228, total | daily maximum | report only (pCi/L) | all year | 002B |
| Uranium, total | 30-day average | ≤ 2000 ug/L | all year | 002B |
| Uranium, total | daily maximum | ≤ 4000 ug/L | all year | 002B |
| Rainfall | 30-day average | report only (in) | all year | 002B |
| Rainfall | daily maximum | report only (in) | all year | 002B |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 002B |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002B |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 002B |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002B |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002B |
| Oxygen demand, chem. [high level] [COD] | 30-day average | ≤ 100 mg/L | all year | 002C |
| Oxygen demand, chem. [high level] [COD] | daily maximum | ≤ 200 mg/L | all year | 002C |
| pH | minimum | ≥ 6.5 SU | all year | 002C |
| pH | maximum | ≤ 9 SU | all year | 002C |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 002C |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002C |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 002C |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 002C |
| Radium 226, total | 30-day average | report only (pCi/L) | all year | 002C |
| Radium 226, total | daily maximum | ≤ 30 pCi/L | all year | 002C |
| Radium 226, dissolved | 30-day average | ≤ 3 pCi/L | all year | 002C |
| Radium 226, dissolved | daily maximum | ≤ 10 pCi/L | all year | 002C |
| Radium 226 + radium 228, total | 30-day average | ≤ 5 pCi/L | all year | 002C |
| Radium 226 + radium 228, total | daily maximum | report only (pCi/L) | all year | 002C |
| Uranium, total | 30-day average | ≤ 2000 ug/L | all year | 002C |
| Uranium, total | daily maximum | ≤ 4000 ug/L | all year | 002C |
| Rainfall | 30-day average | report only (in) | all year | 002C |
| Rainfall | daily maximum | report only (in) | all year | 002C |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 002C |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002C |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 002C |
| Solids, total dissolved | daily maximum | report only (mg/L) | all year | 002C |
| Oil and grease visual | instantaneous maximum | report only (N=0;Y=1) | all year | 002C |
Cited limits by parameter: Colorado's rules and the federal ones.
Same industry: the 30 Metal Mining permits in Colorado.
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