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Sewage treatment plant, major discharger, Vernal, Utah. NPDES permit UT0025348 expired Nov 30, 2021; its limits still apply. Last 12 months: no values over a limit, 1 required value missing. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5.5 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 25 mg/L | all year |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 35 mg/L | all year |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year |
| pH | daily minimum | ≥ 6.5 SU | all year |
| pH | daily maximum | ≤ 9 SU | all year |
| Solids, total suspended | 30-day average | ≤ 25 mg/L | all year |
| Solids, total suspended | maximum weekly average | ≤ 35 mg/L | all year |
| Solids, total suspended | 30-day average | report only (mg/L) | all year |
| Oil & Grease | 30-day average | report only (mg/L) | all year |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 4.1 mg/L | Oct–Dec |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.8 mg/L | Jul–Sep |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 5.8 mg/L | Jan–Mar |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 3.9 mg/L | Apr–Jun |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 10.7 mg/L | Jul–Sep |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.6 mg/L | Oct–Dec |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19.4 mg/L | Jan–Mar |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 11.6 mg/L | Apr–Jun |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Nitrogen, Kjeldahl, total [as N] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Phosphorus, total [as P] | 30-day average | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Arsenic, total [as As] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year |
| Molybdenum, total [as Mo] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | 30-day average | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Selenium, total [as Se] | daily maximum | report only (mg/L) | all year |
| Phosphate, ortho [as P] | 30-day average | report only (mg/L) | all year |
| Flow, in conduit or thru treatment plant | maximum monthly average | ≤ 4.7 MGD | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year |
| E. coli | weekly geometric mean | ≤ 157 #/100mL | all year |
| Solids, total dissolved | daily maximum | ≤ 760 mg/L | all year |
| Nitrogen, nitrate total [as NO3] | 30-day average | report only (mg/L) | all year |
| Nitrogen, nitrite total [as NO2] | 30-day average | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| Mercury, total [as Hg] | daily maximum | report only (mg/L) | all year |
| BOD, 5-day, percent removal | minimum % removal | ≥ 85 % | all year |
| Solids, suspended percent removal | minimum % removal | ≥ 85 % | all year |
| Oil and grease visual | 30-day average | ≤ 0 N=0;Y=1 | all year |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | Jan, Feb, Mar, Jul, Aug, Sep |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | Jan, Feb, Mar, Jul, Aug, Sep |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | Apr, May, Jun, Oct, Nov, Dec |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | Apr, May, Jun, Oct, Nov, Dec |
Cited limits by parameter: Utah's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/UT0025348 · MCP: https://passage-data.com/mcp