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Sewage treatment plant, major discharger, Fruita, Colorado. NPDES permit CO0048854 expired Sep 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 001 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 9 SU | all year | 001 |
| Solids, total suspended | 30-day average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.6 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.1 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.6 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.5 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.2 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.6 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 4.1 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 3.2 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.1 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 2.6 mg/L | Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 19 mg/L | Feb | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 21 mg/L | Jan | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Jun | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | May | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Jul | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 20 mg/L | Mar | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Dec | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Nov | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 15 mg/L | Sep | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 17 mg/L | Oct | 001 |
| Phosphorus, total [as P] | annual median | ≤ 12 mg/L | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 57 ug/L | all year | 001 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 5 ug/L | all year | 001 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 001 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 001 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 001 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 001 |
| Molybdenum, total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | ≤ 23.7 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | ≤ 11 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 23.7 ug/L | all year | 001 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | ≤ 16 ug/L | all year | 001 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 001 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | 30-day average | ≤ 1 ug/L | all year | 001 |
| Silver, potentially dissolved | 30-day average | ≤ .59 ug/L | all year | 001 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Copper, potentially dissolved | 30-day average | ≤ 25 ug/L | all year | 001 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 001 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 1 ug/L | all year | 001 |
| Cadmium, potentially dissolvd | daily maximum | ≤ 4.8 ug/L | all year | 001 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | ≤ 4.6 ug/L | all year | 001 |
| Selenium, potentially dissolvd | daily maximum | ≤ 18 ug/L | all year | 001 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 001 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 001 |
| Total phenols | daily maximum | report only (ug/L) | all year | 001 |
| Chromium, trivalent total recoverable | 30-day average | report only (ug/L) | all year | 001 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 001 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 001 |
| Strontium 90, total | 30-day average | report only (pCi/L) | all year | 001 |
| Cesium-134 | 30-day average | report only (pCi/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 2.33 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | 30-day average | ≤ .011 mg/L | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .019 mg/L | all year | 001 |
| Mercury, total [low level] | 30-day average | ≤ 7.3 ug/L | all year | 001 |
| Mercury, total [low level] | 30-day average | ≤ .01 ug/L | all year | 001 |
| E. coli | 30-day average | ≤ 2000 #/100mL | all year | 001 |
| E. coli | maximum 7-day average | ≤ 4000 #/100mL | all year | 001 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | report only (mg/L) | all year | 001 |
| Nitrogen, Total As N | annual median | ≤ 100 mg/L | all year | 001 |
| Nonylphenol | 30-day average | ≤ 10 ug/L | all year | 001 |
| Nonylphenol | 30-day average | ≤ 6.6 ug/L | all year | 001 |
| Nonylphenol | daily maximum | report only (ug/L) | all year | 001 |
| Nonylphenol | daily maximum | report only (ug/L) | all year | 001 |
| Thorium-230 + Thorium-232 | 30-day average | report only (pCi/L) | 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 |
| 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 |
| Mercury, total [as Hg] | 30-day average | report only (ug/L) | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | ≤ 25 mg/L | all year | 001 |
| BOD, carbonaceous [5 day, 20 C] | maximum 7-day average | ≤ 40 mg/L | all year | 001 |
| BOD, carb-5 day, 20 deg C, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 100 tox chronic | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | single sample | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | report only (tox chronic) | all year | 001 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | ≥ 100 tox chronic | all year | 001 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| Plant capacity fact. percent of capacity | 30-day average | report only (%) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 300 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (lb/d) | all year | 300 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (lb/d) | all year | 300 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 300 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 300 |
| Flow, in conduit or thru treatment plant | 30-day average | report only (MGD) | all year | 300 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 300 |
| BOD, carbonaceous [5 day, 20 C] | 30-day average | report only (mg/L) | all year | 300 |
| BOD, carbonaceous [5 day, 20 C] | maximum 7-day average | report only (mg/L) | all year | 300 |
Cited limits by parameter: Colorado's rules and the federal ones.
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