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Miscellaneous Nonmetallic Minerals, Vernal, Utah. NPDES permit UT0025259, in force until Mar 31, 2027. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | instantaneous minimum | report only (deg C) | all year | 002 |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 002 |
| Flow rate | 30-day average | report only (MGD) | all year | 002 |
| Flow rate | daily maximum | report only (MGD) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | 30-day average | ≤ 25 mg/L | all year | 002 |
| Solids, total suspended | 7-day average | ≤ 35 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | 002 |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | all year | 002 |
| Sodium, total [as Na] | daily maximum | report only (mg/L) | all year | 002 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 002 |
| Potassium, total [as K] | daily maximum | report only (mg/L) | all year | 002 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 002 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 002 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 002 |
| Bicarbonate as [CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Carbonate ion [as CaCO3] | daily maximum | report only (mg/L) | all year | 002 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | daily maximum | ≤ 3500 mg/L | all year | 002 |
| Sulfate | daily maximum | report only (mg/L) | all year | 002 |
| Oil and grease visual | instantaneous maximum | ≤ 0 abst=0;prst=1 (alert, not enforceable) | all year | 002 |
| Temperature, water deg. centigrade | instantaneous minimum | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | instantaneous maximum | report only (deg C) | all year | 003 |
| Flow rate | 30-day average | report only (MGD) | all year | 003 |
| Flow rate | daily maximum | report only (MGD) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | 30-day average | ≤ 25 mg/L | all year | 003 |
| Solids, total suspended | 7-day average | ≤ 35 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 003 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Calcium, total [as Ca] | daily maximum | report only (mg/L) | all year | 003 |
| Magnesium, total [as Mg] | daily maximum | report only (mg/L) | all year | 003 |
| Sodium, total [as Na] | daily maximum | report only (mg/L) | all year | 003 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 003 |
| Potassium, total [as K] | daily maximum | report only (mg/L) | all year | 003 |
| Chloride [as Cl] | daily maximum | report only (mg/L) | all year | 003 |
| Fluoride, total [as F] | daily maximum | report only (mg/L) | all year | 003 |
| Iron, total [as Fe] | daily maximum | report only (mg/L) | all year | 003 |
| Bicarbonate as [CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Carbonate ion [as CaCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Solids, total dissolved | 30-day average | report only (mg/L) | all year | 003 |
| Solids, total dissolved | daily maximum | ≤ 3500 mg/L | all year | 003 |
| Sulfate | daily maximum | report only (mg/L) | all year | 003 |
| Oil and grease visual | instantaneous maximum | ≤ 0 abst=0;prst=1 (alert, not enforceable) | all year | 003 |
| Solids, total dissolved | rolling average | ≤ 366 ton/yr | all year | SUM |
| Solids, total dissolved | rolling average | ≤ 366 ton/yr | all year | SUM |
| Solids, total dissolved | rolling average | ≤ 366 ton/yr | all year | SUM |
| Solids, total dissolved | rolling average | ≤ 366 ton/yr | all year | SUM |
Cited limits by parameter: Utah's rules and the federal ones.
Same industry: the 4 Mining and Quarrying of Nonmetallic Minerals permits in Utah.
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