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Sewage treatment plant, major discharger, La Verkin, Utah. NPDES permit UT0026301, in force until Nov 30, 2030. Last 12 months: over a limit 4 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| May 2026 | E. coli, 7-day median | 1 #/100mL | ≤ 0 #/100mL | — |
| July 2026 | E. coli, daily maximum | 2420 #/100mL | ≤ 9 #/100mL | 26789% |
| July 2026 | Oxygen, dissolved [DO], monthly average minimum | 6.49 mg/L | ≥ 6.5 mg/L | 0% |
| August 2026 | Oxygen, dissolved [DO], monthly average minimum | 6.43 mg/L | ≥ 6.5 mg/L | 1% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum monthly average | report only (deg C) | all year | 001 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 5.5 mg/L | all year | 001 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 25 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 35 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | report only (mg/L) | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (mg/L) | all year | 001 |
| pH | daily minimum | ≥ 6.5 SU | all year | 001 |
| pH | daily maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 25 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 35 mg/L | all year | 001 |
| Solids, total suspended | maximum monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.8 mg/L | Apr–Jun | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.2 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.5 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.6 mg/L | Jul–Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 6.9 mg/L | Apr–Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 7.5 mg/L | Jan–Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 8.9 mg/L | Oct–Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 9 mg/L | Jul–Sep | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 001 |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 001 |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 001 |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 001 |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 001 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 001 |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 001 |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 001 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 001 |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 001 |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 001 |
| Phosphate, ortho [as P] | maximum monthly average | report only (mg/L) | all year | 001 |
| E. coli | maximum monthly average | ≤ 126 #/100mL | all year | 001 |
| E. coli | maximum weekly average | ≤ 157 #/100mL | all year | 001 |
| Phosphorus, Total | annual average | ≤ 1 mg/L | all year | 001 |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 001 |
| Solids, total dissolved | maximum monthly average | ≤ 400 mg/L | all year | 001 |
| Nitrogen, nitrate total [as NO3] | maximum monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrite total [as NO2] | maximum monthly average | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 001 |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 001 |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 001 |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Flow, total | maximum monthly average | report only (MGD) | all year | 001 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | Apr, May, Jun, Oct, Nov, Dec | 001 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | Jan, Feb, Mar, Jul, Aug, Sep | 001 |
| Temperature, water deg. centigrade | maximum monthly average | report only (deg C) | all year | 001R |
| Turbidity | daily maximum | ≤ 5 NTU | all year | 001R |
| Turbidity | daily average | ≤ 2 NTU | all year | 001R |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 6.5 mg/L | all year | 001R |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 001R |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 10 mg/L | all year | 001R |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 35 mg/L | all year | 001R |
| BOD, 5-day, 20 deg. C | maximum monthly average | report only (mg/L) | all year | 001R |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (mg/L) | all year | 001R |
| pH | daily minimum | ≥ 6.5 SU | all year | 001R |
| pH | daily maximum | ≤ 9 SU | all year | 001R |
| Solids, total suspended | maximum monthly average | ≤ 25 mg/L | all year | 001R |
| Solids, total suspended | maximum weekly average | ≤ 35 mg/L | all year | 001R |
| Solids, total suspended | maximum monthly average | report only (mg/L) | all year | 001R |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year | 001R |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 001R |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.1 mg/L | Apr–Jun | 001R |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.1 mg/L | Jan–Mar | 001R |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.6 mg/L | Oct–Dec | 001R |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.3 mg/L | Jul–Sep | 001R |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Apr–Jun | 001R |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.2 mg/L | Jan–Mar | 001R |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.2 mg/L | Oct–Dec | 001R |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.1 mg/L | Jul–Sep | 001R |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 001R |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 001R |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001R |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 001R |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 001R |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 001R |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 001R |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 001R |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 001R |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 001R |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 001R |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 001R |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 001R |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 001R |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 001R |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 001R |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 001R |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 001R |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 001R |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 001R |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 001R |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 001R |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 001R |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 001R |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 001R |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 001R |
| Phosphate, ortho [as P] | maximum monthly average | report only (mg/L) | all year | 001R |
| Chlorine, total residual | daily minimum | ≥ 1 mg/L | all year | 001R |
| E. coli | 7-day median | ≤ 0 #/100mL | all year | 001R |
| E. coli | daily maximum | ≤ 9 #/100mL | all year | 001R |
| Phosphorus, Total | annual average | ≤ 1 mg/L | all year | 001R |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 001R |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 001R |
| Solids, total dissolved | maximum monthly average | ≤ 400 mg/L | all year | 001R |
| Nitrogen, nitrate total [as NO3] | maximum monthly average | report only (mg/L) | all year | 001R |
| Nitrogen, nitrite total [as NO2] | maximum monthly average | report only (mg/L) | all year | 001R |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 001R |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 001R |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 001R |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 001R |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001R |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001R |
| Flow, total | maximum monthly average | report only (MGD) | all year | 001R |
| Temperature, water deg. centigrade | maximum monthly average | report only (deg C) | all year | 002 |
| Turbidity | daily maximum | ≤ 5 NTU | all year | 002 |
| Turbidity | daily average | ≤ 2 NTU | all year | 002 |
| Oxygen, dissolved [DO] | monthly average minimum | ≥ 6.5 mg/L | all year | 002 |
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 10 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 35 mg/L | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum monthly average | report only (mg/L) | all year | 002 |
| BOD, 5-day, 20 deg. C | maximum weekly average | report only (mg/L) | all year | 002 |
| pH | daily minimum | ≥ 6.5 SU | all year | 002 |
| pH | daily maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | maximum monthly average | ≤ 25 mg/L | all year | 002 |
| Solids, total suspended | maximum weekly average | ≤ 35 mg/L | all year | 002 |
| Solids, total suspended | maximum monthly average | report only (mg/L) | all year | 002 |
| Solids, total suspended | maximum weekly average | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.1 mg/L | Apr–Jun | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.1 mg/L | Jan–Mar | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.6 mg/L | Oct–Dec | 002 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.3 mg/L | Jul–Sep | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.7 mg/L | Apr–Jun | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 2.2 mg/L | Jan–Mar | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.2 mg/L | Oct–Dec | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 3.1 mg/L | Jul–Sep | 002 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 002 |
| Phosphorus, total [as P] | maximum monthly average | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 002 |
| Cyanide, total [as CN] | quarterly maximum | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 002 |
| Arsenic, total [as As] | quarterly maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 002 |
| Cadmium, total [as Cd] | quarterly maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 002 |
| Chromium, total [as Cr] | quarterly maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 002 |
| Copper, total [as Cu] | quarterly maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 002 |
| Lead, total [as Pb] | quarterly maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 002 |
| Nickel, total [as Ni] | quarterly maximum | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 002 |
| Silver, total [as Ag] | quarterly maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 002 |
| Zinc, total [as Zn] | quarterly maximum | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 002 |
| Aluminum, total [as Al] | quarterly maximum | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 002 |
| Selenium, total [as Se] | quarterly maximum | report only (mg/L) | all year | 002 |
| Phosphate, ortho [as P] | maximum monthly average | report only (mg/L) | all year | 002 |
| Chlorine, total residual | daily minimum | ≥ 1 mg/L | all year | 002 |
| E. coli | 7-day median | ≤ 0 #/100mL | all year | 002 |
| E. coli | daily maximum | ≤ 9 #/100mL | all year | 002 |
| Phosphorus, Total | annual average | ≤ 1 mg/L | all year | 002 |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | maximum monthly average | report only (mg/L) | all year | 002 |
| Solids, total dissolved | maximum monthly average | ≤ 400 mg/L | all year | 002 |
| Nitrogen, nitrate total [as NO3] | maximum monthly average | report only (mg/L) | all year | 002 |
| Nitrogen, nitrite total [as NO2] | maximum monthly average | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 002 |
| Mercury, total [as Hg] | quarterly maximum | report only (mg/L) | all year | 002 |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 002 |
| Organics, total toxic [TTO] | annual total | report only (mg/L) | all year | 002 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 002 |
| Flow, total | maximum monthly average | report only (MGD) | all year | 002 |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | daily maximum | ≤ 0 pass=0;fail=1 | Apr, May, Jun, Oct, Nov, Dec | 002 |
| Pass/Fail Static Renewal 7Day Chronic Pimephales promelas | daily maximum | ≤ 0 pass=0;fail=1 | Jan, Feb, Mar, Jul, Aug, Sep | 002 |
| Flow, total | maximum monthly average | ≤ 1.5 MGD | all year | SUM |
| Flow, total | maximum monthly average | report only (MGD) | all year | SUM |
Cited limits by parameter: Utah's rules and the federal ones.
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