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Rolling Mill Machinery, major discharger, Parshall, Colorado. NPDES permit CO0000230, in force until Mar 31, 2030. Last 12 months: no values over a limit, 52 required values missing, 1 of 346 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | maximum weekly average | ≤ 38.6 deg C | Apr | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 20.4 deg C | May | 007 |
| Temperature, water deg. centigrade | maximum weekly average | report only (deg C) | Jun | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 22.4 deg C | Jul | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 24.1 deg C | Aug | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 47 deg C | Sep | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 9 deg C | Oct | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 57 deg C | Nov | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 57 deg C | Dec | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 57 deg C | Jan | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 57 deg C | Feb | 007 |
| Temperature, water deg. centigrade | maximum weekly average | ≤ 57 deg C | Mar | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 13 deg C | Apr | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 18.5 deg C | May | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jun | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 21.7 deg C | Jul | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 21.7 deg C | Aug | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 50.4 deg C | Sep | 007 |
| Temperature, water deg. centigrade | daily maximum | ≤ 13 deg C | Oct | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Nov | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Dec | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Jan | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Feb | 007 |
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Mar | 007 |
| Conductivity | 30-day average | ≤ 14 dS/m | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 9 SU | all year | 007 |
| Bicarbonate ion- [as HCO3] | 30-day average | report only (mg/L) | all year | 007 |
| Bicarbonate ion- [as HCO3] | daily maximum | report only (mg/L) | all year | 007 |
| Solids, total suspended | 30-day average | ≤ 20 mg/L | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 44 mg/L | Jan | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 39 mg/L | Feb | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 43 mg/L | Mar | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 51 mg/L | Apr | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 65 mg/L | May | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 65 mg/L | Jun | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 65 mg/L | Jul | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 65 mg/L | Aug | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 29 mg/L | Sep | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 46 mg/L | Oct | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 65 mg/L | Nov | 007 |
| Nitrogen, ammonia total [as N] | 30-day average | ≤ 56 mg/L | Dec | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jan | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Feb | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Mar | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Apr | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | May | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jun | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Jul | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Aug | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 58 mg/L | Sep | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Oct | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Nov | 007 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 65 mg/L | Dec | 007 |
| Nitrogen, inorganic total | daily maximum | ≤ 109 mg/L | all year | 007 |
| Phosphorus, total [as P] | 30-day average | ≤ 1.3 mg/L | all year | 007 |
| Cyanide, weak acid, dissociable | daily maximum | ≤ 55 ug/L | all year | 007 |
| Calcium, total recoverable | 30-day average | report only (mg/L) | all year | 007 |
| Calcium, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Magnesium, total recoverable | 30-day average | report only (mg/L) | all year | 007 |
| Magnesium, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Sodium, total recoverable | 30-day average | report only (mg/L) | all year | 007 |
| Sodium, total recoverable | daily maximum | report only (mg/L) | all year | 007 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 007 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 007 |
| Sodium adsorption ratio | 30-day average | report only (Ratio) | all year | 007 |
| Sodium adsorption ratio | daily maximum | report only (Ratio) | all year | 007 |
| Chloride [as Cl] | 30-day average | ≤ 2942 mg/L | all year | 007 |
| Arsenic, total recoverable | 30-day average | ≤ 3 ug/L | all year | 007 |
| Arsenic, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 007 |
| Iron, total recoverable | 30-day average | ≤ 9777 ug/L | all year | 007 |
| Beryllium, total recoverable [as Be] | 30-day average | report only (ug/L) | all year | 007 |
| Beryllium, total recoverable [as Be] | rolling average | report only (ug/L) | all year | 007 |
| Iron, dissolved [as Fe] | 30-day average | ≤ 1625 ug/L | all year | 007 |
| Manganese, dissolved [as Mn] | 30-day average | ≤ 415 ug/L | all year | 007 |
| Thallium, dissolved [as Tl] | 30-day average | ≤ 2.8 ug/L | all year | 007 |
| Thallium, total [as Tl] | 30-day average | ≤ 5.9 ug/L | all year | 007 |
| Nickel, total recoverable | 30-day average | report only (ug/L) | all year | 007 |
| Zinc, total recoverable | 30-day average | ≤ 500 ug/L | all year | 007 |
| Zinc, total recoverable | daily maximum | ≤ 1000 ug/L | all year | 007 |
| Antimony, dissolved [as Sb] | 30-day average | report only (ug/L) | all year | 007 |
| Antimony, total [as Sb] | 30-day average | report only (ug/L) | all year | 007 |
| Aluminum, total recoverable | 30-day average | ≤ 1024 ug/L | all year | 007 |
| Aluminum, total recoverable | daily maximum | ≤ 7898 ug/L | all year | 007 |
| Cadmium, total recoverable | 30-day average | ≤ 50 ug/L | all year | 007 |
| Cadmium, total recoverable | daily maximum | ≤ 55 ug/L | all year | 007 |
| Lead, total recoverable | 30-day average | ≤ 300 ug/L | all year | 007 |
| Lead, total recoverable | daily maximum | ≤ 549 ug/L | all year | 007 |
| Chromium, total recoverable | daily maximum | report only (ug/L) | all year | 007 |
| Copper, total recoverable | 30-day average | ≤ 150 ug/L | all year | 007 |
| Copper, total recoverable | daily maximum | ≤ 300 ug/L | all year | 007 |
| Molybdenum, total recoverable | 30-day average | ≤ 2236 ug/L | all year | 007 |
| Chromium, hexavalent dissolved [as Cr] | 30-day average | report only (ug/L) | all year | 007 |
| Chromium, hexavalent dissolved [as Cr] | daily maximum | report only (ug/L) | all year | 007 |
| Zinc, potentially dissolved | 30-day average | ≤ 446 ug/L | all year | 007 |
| Zinc, potentially dissolved | daily maximum | ≤ 571 ug/L | all year | 007 |
| Silver, potentially dissolved | 30-day average | ≤ .13 ug/L | all year | 007 |
| Silver, potentially dissolved | daily maximum | ≤ 3.2 ug/L | all year | 007 |
| Copper, potentially dissolved | 30-day average | ≤ 29 ug/L | all year | 007 |
| Copper, potentially dissolved | daily maximum | ≤ 41 ug/L | all year | 007 |
| Cadmium, potentially dissolvd | 30-day average | ≤ 3.5 ug/L | all year | 007 |
| Cadmium, potentially dissolvd | daily maximum | ≤ 6.8 ug/L | all year | 007 |
| Chromium, trivalent, potentially dissolvd | 30-day average | report only (ug/L) | all year | 007 |
| Lead, potentially dissolvd | 30-day average | ≤ 7.3 ug/L | all year | 007 |
| Lead, potentially dissolvd | daily maximum | ≤ 197 ug/L | all year | 007 |
| Manganese, potentially dissolvd | 30-day average | ≤ 13115 ug/L | all year | 007 |
| Manganese, potentially dissolvd | daily maximum | ≤ 22313 ug/L | all year | 007 |
| Nickel, potentially dissolvd | 30-day average | report only (ug/L) | all year | 007 |
| Nickel, potentially dissolvd | daily maximum | report only (ug/L) | all year | 007 |
| Selenium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 007 |
| Selenium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 007 |
| Uranium, potentially dissolvd | 30-day average | report only (ug/L) | all year | 007 |
| Uranium, potentially dissolvd | daily maximum | report only (ug/L) | all year | 007 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 007 |
| Chromium, trivalent total recoverable | daily maximum | report only (ug/L) | all year | 007 |
| Radium 226 + radium 228, total | 30-day average | report only (pCi/L) | all year | 007 |
| Uranium, total | 30-day average | report only (ug/L) | all year | 007 |
| Benzo[b]fluoranthene | 30-day average | ≤ .06 ug/L | all year | 007 |
| Benzo[k]fluoranthene | 30-day average | ≤ .6 ug/L | all year | 007 |
| Benzo[a]pyrene | 30-day average | ≤ .006 ug/L | all year | 007 |
| Chrysene | 30-day average | ≤ 6 ug/L | all year | 007 |
| Fluoranthene | 30-day average | ≤ 1530 ug/L | all year | 007 |
| Indeno[1,2,3-cd]pyrene | 30-day average | ≤ .06 ug/L | all year | 007 |
| Pyrene | 30-day average | ≤ 2472 ug/L | all year | 007 |
| Benzo[a]anthracene | 30-day average | ≤ .06 ug/L | all year | 007 |
| Dibenz[a,h]anthracene | 30-day average | ≤ .006 ug/L | all year | 007 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .864 MGD | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 007 |
| Chlorine, total residual | 30-day average | ≤ .13 mg/L | all year | 007 |
| Chlorine, total residual | daily maximum | ≤ .21 mg/L | all year | 007 |
| Mercury, total [low level] | 30-day average | ≤ .11 ug/L | all year | 007 |
| Mercury, total [low level] | daily maximum | ≤ 2 ug/L | all year | 007 |
| Acrylamide | 30-day average | ≤ .26 ug/L | all year | 007 |
| E. coli | 30-day average | ≤ 1472 #/100mL | all year | 007 |
| E. coli | daily maximum | ≤ 2944 #/100mL | all year | 007 |
| Sulfide-hydrogen sulfide [undissociated] | 30-day average | ≤ .024 mg/L | all year | 007 |
| Perfluorooctanoic acid (PFOA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorobutanoic acid (PFBA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorobutanoic acid (PFBA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorooctanesulfonamide (PFOSA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorooctanesulfonamide (PFOSA) | daily maximum | report only (ng/L) | all year | 007 |
| Sodium Absorption Ratio | instantaneous maximum | report only (pass=0;fail=1) | all year | 007 |
| Perfluoropentanoic acid (PFPeA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluoropentanoic acid (PFPeA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorohexanoic acid (PFHxA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorohexanoic acid (PFHxA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluoroheptanoic acid (PFHpA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorononanoic acid (PFNA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorodecanoic acid (PFDA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluoroundecanoic acid (PFUnA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluoroundecanoic acid (PFUnA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorododecanoic acid (PFDoA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorododecanoic acid (PFDoA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorotridecanoic acid (PFTrDA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorotridecanoic acid (PFTrDA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorotetradecanoic acid (PFTeDA) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorotetradecanoic acid (PFTeDA) | daily maximum | report only (ng/L) | all year | 007 |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | 30-day average | report only (ng/L) | all year | 007 |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | daily maximum | report only (ng/L) | all year | 007 |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | 30-day average | report only (ng/L) | all year | 007 |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorobutanesulfonic acid (PFBS) | 30-day average | ≤ 4707692 ng/L | all year | 007 |
| Perfluorobutanesulfonic acid (PFBS) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorodecanesulfonic acid (PFDS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorodecanesulfonic acid (PFDS) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluoroheptanesulfonic acid (PFHpS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluoroheptanesulfonic acid (PFHpS) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorohexanesulfonic acid (PFHxS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | ≤ 8238 ng/L | all year | 007 |
| Perfluorooctanesulfonic acid (PFOS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | 007 |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | 30-day average | report only (ng/L) | all year | 007 |
| 1H,1H,2H,2H-Perfluorohexane sulfonic acid (4:2 FTS) | daily maximum | report only (ng/L) | all year | 007 |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | 30-day average | report only (ng/L) | all year | 007 |
| 1H,1H,2H,2H-Perfluorooctane sulfonic acid (6:2 FTS) | daily maximum | report only (ng/L) | all year | 007 |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | 30-day average | report only (ng/L) | all year | 007 |
| 1H,1H, 2H, 2H-Perfluorodecane sulfonic acid (8:2 FTS) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluoropentanesulfonic acid (PFPeS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluoropentanesulfonic acid (PFPeS) | daily maximum | report only (ng/L) | all year | 007 |
| Perfluorononanesulfonic acid (PFNS) | 30-day average | report only (ng/L) | all year | 007 |
| Perfluorononanesulfonic acid (PFNS) | daily maximum | report only (ng/L) | all year | 007 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | 30-day average | report only (ng/L) | all year | 007 |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) | daily maximum | report only (ng/L) | all year | 007 |
| Sulfate | 30-day average | ≤ 2881 mg/L | all year | 007 |
| Boron, total | 30-day average | report only (mg/L) | all year | 007 |
| Oil and grease visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 007 |
| PFAS Sum | 30-day average | ≤ 824 ng/L | all year | 007 |
| PFAS Sum | daily maximum | ≤ 770 ng/L | all year | 007 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | single sample | report only (tox chronic) | all year | 007 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | minimum value | report only (tox chronic) | all year | 007 |
| TU Static Renewal 7-Day Chronic Ceriodaphnia dubia | minimum value | ≥ 8 tox chronic | all year | 007 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | single sample | report only (tox chronic) | all year | 007 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | minimum value | report only (tox chronic) | all year | 007 |
| TU Static Renewal 7-Day Chronic Pimphales promelas | minimum value | ≥ 8 tox chronic | all year | 007 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 008 |
| BOD, 5-day, 20 deg. C | 30-day average | report only (mg/L) | all year | 008 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 008 |
| BOD, 5-day, 20 deg. C | maximum 7-day average | report only (mg/L) | all year | 008 |
| pH | minimum | ≥ 5.3 SU | all year | 008 |
| pH | maximum | ≤ 9 SU | all year | 008 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 008 |
| Solids, total suspended | 30-day average | report only (mg/L) | all year | 008 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 008 |
| Solids, total suspended | maximum 7-day average | report only (mg/L) | all year | 008 |
| Oil and grease | instantaneous maximum | ≤ 10 mg/L | all year | 008 |
| Flow, in conduit or thru treatment plant | 30-day average | ≤ .014 MGD | all year | 008 |
| Chlorine, total residual | instantaneous maximum | ≤ 1.39 mg/L | all year | 008 |
| Oil and grease visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 008 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 009 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 009 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 010 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 010 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 011 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 011 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 012 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 012 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 013 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 013 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 014 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 014 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 015 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 015 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 016 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 016 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 017 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 017 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 018 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 018 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 019 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 019 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 020 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 020 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 021 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 021 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 022 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 022 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 023 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 023 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 024 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 024 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 025 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 025 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 026 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 026 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 027 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 027 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 028 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 028 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 029 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 029 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 030 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 030 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 031 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 031 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | all year | 032 |
| Area inspection visual | instantaneous maximum | report only (pass=0;fail=1) | Dec | 032 |
| Hardness, total [as CaCO3] | 30-day average | report only (mg/L) | all year | DST1 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | all year | DST1 |
| 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 |
| Parameter | New limit | From | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C, 30-day average outfall 008 | 30 mg/L | Nov 1, 2026 | new | 56 mg/L (11 values) | 1.87× |
| BOD, 5-day, 20 deg. C, maximum 7-day average outfall 008 | 45 mg/L | Nov 1, 2026 | new | 56 mg/L (11 values) | 1.24× |
| Chlorine, total residual, instantaneous maximum outfall 008 | 0.5 mg/L | Nov 1, 2026 | tighter | 0.7 mg/L (11 values, 1 below detection) | 1.4× |
| Solids, total suspended, 30-day average outfall 008 | 30 mg/L | Nov 1, 2026 | new | 100 mg/L (11 values) | 3.33× |
| Solids, total suspended, maximum 7-day average outfall 008 | 45 mg/L | Nov 1, 2026 | new | 100 mg/L (11 values) | 2.22× |
| Arsenic, total recoverable, 30-day average outfall 007 | 0.02 ug/L | Jan 1, 2030 | tighter | — | — |
Cited limits by parameter: Colorado's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/CO0000230 · MCP: https://passage-data.com/mcp