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Sewage treatment plant, major discharger, La Junta, Colorado. NPDES permit CO0021261 expired Sep 30, 2024; its limits still apply. Last 12 months: over a limit 12 times (last August 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 003 | Conductivity, 30-day average | 3.225 dS/m | ≤ 2.1 dS/m | 54% |
| November 2025 | 003 | Conductivity, 30-day average | 2.731 dS/m | ≤ 2.1 dS/m | 30% |
| December 2025 | 003 | Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum value | 69 tox chronic | ≥ 100 tox chronic | 31% |
| January 2026 | 003 | Conductivity, 30-day average | 2.663 dS/m | ≤ 2.1 dS/m | 27% |
| February 2026 | 003 | Conductivity, 30-day average | 2.599 dS/m | ≤ 2.1 dS/m | 24% |
| April 2026 | 003 | Conductivity, 30-day average | 3.051 dS/m | ≤ 2.1 dS/m | 45% |
| May 2026 | 003 | Conductivity, 30-day average | 2.64 dS/m | ≤ 2.1 dS/m | 26% |
| June 2026 | 001 | Solids, total suspended, maximum 7-day average | 56 mg/L | ≤ 45 mg/L | 24% |
| June 2026 | 003 | Conductivity, 30-day average | 3.739 dS/m | ≤ 2.1 dS/m | 78% |
| June 2026 | 003 | Static Renewal 7 Day Chronic Ceriodaphnia dubia, minimum value | 22.5 tox chronic | ≥ 100 tox chronic | 78% |
| July 2026 | 003 | Conductivity, 30-day average | 3.481 dS/m | ≤ 2.1 dS/m | 66% |
| August 2026 | 003 | Conductivity, 30-day average | 3.434 dS/m | ≤ 2.1 dS/m | 64% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 30-day average | ≤ 30 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | ≤ 45 mg/L | all year | 001 |
| pH | minimum | ≥ 6 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 |
| Cyanide, total [as CN] | daily maximum | 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 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 001 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 001 |
| Selenium, 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 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 1.65 MGD | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| Chlorine, total residual | instantaneous maximum | ≤ .5 mg/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | report only (ug/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 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 001 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 2.5 MGD | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 002 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | 003 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | 003 |
| Conductivity | 30-day average | ≤ 2.1 dS/m | all year | 003 |
| Conductivity | 30-day average | ≤ 3 dS/m | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Bicarbonate ion- [as HCO3] | 30-day average | report only (mg/L) | all year | 003 |
| Bicarbonate ion- [as HCO3] | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.7 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.5 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 14 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.2 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.4 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 5.2 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 6.3 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 9.6 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.4 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.5 mg/L | Oct | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 8.3 mg/L | Nov | 003 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 7.3 mg/L | Sep | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28 mg/L | Apr | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 23 mg/L | Feb | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | Jan | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 26 mg/L | May | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 34 mg/L | Jun | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 25 mg/L | Jul | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 35 mg/L | Aug | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 16 mg/L | Dec | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 24 mg/L | Mar | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 27 mg/L | Oct | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 22 mg/L | Nov | 003 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 28 mg/L | Sep | 003 |
| Cyanide, weak acid, dissociable | daily maximum | report only (ug/L) | all year | 003 |
| Calcium, total recoverable | 30-day average | report only (mg/L) | all year | 003 |
| Calcium, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Magnesium, total recoverable | 30-day average | report only (mg/L) | all year | 003 |
| Magnesium, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Sodium, total recoverable | 30-day average | report only (mg/L) | all year | 003 |
| Sodium, total recoverable | daily maximum | report only (mg/L) | all year | 003 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 003 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 003 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 003 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 003 |
| Chloride [as Cl] | 30-day average | report only (mL/L) | all year | 003 |
| Arsenic, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Arsenic, total recoverable | 30-day average | ≤ 5.4 ug/L | all year | 003 |
| Iron, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Selenium, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Zinc, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Cadmium, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Lead, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Copper, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Molybdenum, total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Zinc, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Silver, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Silver, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Copper, potentially dissolved | 30-day average | report only (ug/L) | all year | 003 |
| Copper, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Arsenic, potentially dissolved | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Cadmium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, trivalent, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Lead, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Lead, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Manganese, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Manganese, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, potentially dissolvd | rolling average | ≤ .37 lb/d | all year | 003 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 003 |
| Chromium, trivalent total recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 003 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 003 |
| Uranium, total | 30-day average | report only (ug/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ 4.15 MGD | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 003 |
| Chlorine, total residual | 30-day average | ≤ .028 mg/L | all year | 003 |
| Chlorine, total residual | instantaneous maximum | ≤ .031 mg/L | all year | 003 |
| Mercury, total [low level] | 30-day average | ≤ .025 ug/L | all year | 003 |
| E. coli | 30-day geometric mean | ≤ 126 #/100mL | all year | 003 |
| E. coli | maximum 7-day geometric mean | ≤ 252 #/100mL | all year | 003 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | ≤ .37 mg/L | all year | 003 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | ≤ .0051 mg/L | all year | 003 |
| Nonylphenol | 30-day average | report only (ug/L) | all year | 003 |
| Nonylphenol | daily maximum | report only (ug/L) | all year | 003 |
| Sodium Absorption Ratio | daily maximum | report only (pass=0;fail=1) | all year | 003 |
| Chromium, hexavalent tot recoverable | 30-day average | report only (ug/L) | all year | 003 |
| Boron, total | 30-day average | report only (ug/L) | all year | 003 |
| Oil and grease visual | instantaneous maximum | report only (abst=0;prst=1) | all year | 003 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year | 003 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year | 003 |
| Static Renewal 7 Day Chronic Ceriodaphnia dubia | minimum value | ≥ 100 tox chronic | all year | 003 |
| Static Renewal 7 Day Chronic Pimephales promelas | single sample | report only (tox chronic) | all year | 003 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | report only (tox chronic) | all year | 003 |
| Static Renewal 7 Day Chronic Pimephales promelas | minimum value | ≥ 100 tox chronic | all year | 003 |
| 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 |
| Cyanide, total [as CN] | daily maximum | report only (ug/L) | all year | 300 |
| Arsenic, total [as As] | daily maximum | report only (ug/L) | all year | 300 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | all year | 300 |
| Chromium, total [as Cr] | daily maximum | report only (ug/L) | all year | 300 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | all year | 300 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | all year | 300 |
| Molybdenum, total [as Mo] | daily maximum | report only (ug/L) | all year | 300 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | all year | 300 |
| Silver, total [as Ag] | daily maximum | report only (ug/L) | all year | 300 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | all year | 300 |
| Selenium, total [as Se] | daily maximum | report only (ug/L) | all year | 300 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 300 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 300 |
| Total phenols | daily maximum | report only (ug/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 |
| Mercury, total [as Hg] | daily maximum | report only (ug/L) | all year | 300 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | all year | UST1 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | all year | UST1 |
Cited limits by parameter: Colorado's rules and the federal ones.
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