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Colowyo Coal Co LP

Bituminous Coal And Lignite - Surface, Moffat County, Colorado. NPDES permit CO0045161 expired Sep 30, 2023; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: outfall 003 form A monthly (42 values), outfall 003 form Q quarterly (2 values), outfall 003 form W quarterly (4 values), outfall 006 form A monthly (42 values), outfall 006 form Q quarterly (2 values), outfall 006 form W quarterly (4 values), and 25 more forms
Last report on file
August 2026
Oct 2024 – Sep 2025
2 values over a limit, 0 required values missing, 0 of 268 reports late

Limits in force (645)

ParameterStatisticLimitMonthsOutfall
Conductivity30-day averagereport only (dS/m)all year003
pHminimum≥ 6.5 SUall year003
pHmaximum≤ 9 SUall year003
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year003
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year003
Solids, total suspended30-day average≤ 35 mg/Lall year003
Solids, total suspendeddaily maximum≤ 70 mg/Lall year003
Calcium, total recoverable30-day averagereport only (mg/L)all year003
Calcium, total recoverabledaily maximumreport only (mg/L)all year003
Magnesium, total recoverable30-day averagereport only (ug/L)all year003
Magnesium, total recoverabledaily maximumreport only (ug/L)all year003
Sodium, total recoverable30-day averagereport only (mg/L)all year003
Sodium, total recoverabledaily maximumreport only (mg/L)all year003
Sodium adsorption ratio30-day averagereport only (Ratio)all year003
Sodium adsorption ratiodaily maximumreport only (Ratio)all year003
Sodium adsorption ratio30-day averagereport only (Ratio)all year003
Sodium adsorption ratiodaily maximumreport only (Ratio)all year003
Arsenic, total recoverable30-day averagereport only (ug/L)all year003
Iron, total recoverable30-day average≤ 1000 mg/Lall year003
Iron, total recoverabledaily maximum≤ 6000 mg/Lall year003
Zinc, potentially dissolved30-day averagereport only (ug/L)all year003
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year003
Silver, potentially dissolved30-day averagereport only (ug/L)all year003
Silver, potentially dissolveddaily maximumreport only (ug/L)all year003
Copper, potentially dissolved30-day averagereport only (ug/L)all year003
Copper, potentially dissolveddaily maximumreport only (ug/L)all year003
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year003
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year003
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year003
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year003
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year003
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year003
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year003
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year003
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year003
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year003
Flow, in conduit or thru treatment plant30-day average≤ .82 MGDall year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
Mercury, total [low level]30-day averagereport only (ug/L)all year003
Solids, total dissolved30-day averagereport only (mg/L)all year003
Sulfate30-day averagereport only (mg/L)all year003
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year003
Discharge event observation [Visual Monitoring]30-day arithmetic meanreport only (#/mo)all year003
Discharge event observation [Visual Monitoring]monthly totalreport only (occur/mo)all year003
Discharge event observation [Visual Monitoring]30-day averagereport only (fail=0;pass=1)all year003
Discharge event observation [Visual Monitoring]30-day averagereport only (fail=0;pass=1)all year003
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaminimum valuereport only (%)all year003
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaminimum value≥ 100 %all year003
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum valuereport only (%)all year003
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year003
Conductivity30-day averagereport only (dS/m)all year006
pHminimum≥ 6.5 SUall year006
pHmaximum≤ 9 SUall year006
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year006
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year006
Solids, total suspended30-day average≤ 35 mg/Lall year006
Solids, total suspendeddaily maximum≤ 70 mg/Lall year006
Calcium, total recoverable30-day averagereport only (mg/L)all year006
Calcium, total recoverabledaily maximumreport only (mg/L)all year006
Magnesium, total recoverable30-day averagereport only (ug/L)all year006
Magnesium, total recoverabledaily maximumreport only (ug/L)all year006
Sodium, total recoverable30-day averagereport only (mg/L)all year006
Sodium, total recoverabledaily maximumreport only (mg/L)all year006
Sodium adsorption ratio30-day averagereport only (Ratio)all year006
Sodium adsorption ratiodaily maximumreport only (Ratio)all year006
Sodium adsorption ratio30-day averagereport only (Ratio)all year006
Sodium adsorption ratiodaily maximumreport only (Ratio)all year006
Arsenic, total recoverable30-day averagereport only (ug/L)all year006
Iron, total recoverable30-day average≤ 1000 mg/Lall year006
Iron, total recoverabledaily maximum≤ 6000 mg/Lall year006
Zinc, potentially dissolved30-day averagereport only (ug/L)all year006
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year006
Silver, potentially dissolved30-day averagereport only (ug/L)all year006
Silver, potentially dissolveddaily maximumreport only (ug/L)all year006
Copper, potentially dissolved30-day averagereport only (ug/L)all year006
Copper, potentially dissolveddaily maximumreport only (ug/L)all year006
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year006
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year006
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year006
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year006
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year006
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year006
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year006
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year006
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year006
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year006
Flow, in conduit or thru treatment plant30-day average≤ .32 MGDall year006
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year006
Mercury, total [low level]30-day averagereport only (ug/L)all year006
Solids, total dissolved30-day averagereport only (mg/L)all year006
Sulfate30-day averagereport only (mg/L)all year006
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year006
Discharge event observation [Visual Monitoring]30-day averagereport only (#/mo)all year006
Discharge event observation [Visual Monitoring]monthly totalreport only (occur/mo)all year006
Discharge event observation [Visual Monitoring]30-day averagereport only (fail=0;pass=1)all year006
Discharge event observation [Visual Monitoring]30-day averagereport only (fail=0;pass=1)all year006
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaminimum valuereport only (%)all year006
LC50 Static Renewal 48Hr Acute Ceriodaphnia dubiaminimum value≥ 100 %all year006
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum valuereport only (%)all year006
LC50 Static Renewal 96Hr Acute Pimephales promelasminimum value≥ 100 %all year006
Conductivity30-day averagereport only (dS/m)all year010
pHminimum≥ 6.5 SUall year010
pHmaximum≤ 9 SUall year010
Bicarbonate ion- [as HCO3]30-day averagereport only (mg/L)all year010
Bicarbonate ion- [as HCO3]daily maximumreport only (mg/L)all year010
Solids, total suspended30-day average≤ 35 mg/Lall year010
Solids, total suspendeddaily maximum≤ 70 mg/Lall year010
Calcium, total recoverable30-day averagereport only (mg/L)all year010
Calcium, total recoverabledaily maximumreport only (mg/L)all year010
Magnesium, total recoverable30-day averagereport only (mg/L)all year010
Magnesium, total recoverabledaily maximumreport only (mg/L)all year010
Sodium, total recoverable30-day averagereport only (mg/L)all year010
Sodium, total recoverabledaily maximumreport only (mg/L)all year010
Sodium adsorption ratio30-day averagereport only (Ratio)all year010
Sodium adsorption ratiodaily maximumreport only (Ratio)all year010
Sodium adsorption ratio30-day averagereport only (Ratio)all year010
Sodium adsorption ratiodaily maximumreport only (Ratio)all year010
Arsenic, total recoverable30-day averagereport only (ug/L)all year010
Iron, total recoverable30-day average≤ 1000 ug/Lall year010
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year010
Zinc, potentially dissolved30-day averagereport only (ug/L)all year010
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year010
Silver, potentially dissolved30-day averagereport only (ug/L)all year010
Silver, potentially dissolveddaily maximumreport only (ug/L)all year010
Copper, potentially dissolved30-day averagereport only (ug/L)all year010
Copper, potentially dissolveddaily maximumreport only (ug/L)all year010
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year010
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year010
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year010
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year010
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year010
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year010
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year010
Oil and greaseinstantaneous maximum≤ 10 mg/Lall year010
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year010
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year010
Flow, in conduit or thru treatment plant30-day average≤ 1.5 MGDall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Mercury, total [low level]30-day averagereport only (ug/L)all year010
Solids, total dissolved30-day geometric meanreport only (mg/L)all year010
Oil and grease visualinstantaneous maximumreport only (abst=0;prst=1)all year010
Static Renewal 7 Day Chronic Ceriodaphnia dubiasingle samplereport only (tox chronic)all year010
Static Renewal 7 Day Chronic Ceriodaphnia dubiaminimum valuereport only (tox chronic)all year010
Static Renewal 7 Day Chronic Pimephales promelassingle samplereport only (tox chronic)all year010
Static Renewal 7 Day Chronic Pimephales promelasminimum valuereport only (tox chronic)all year010
pHminimum≥ 6.5 SUall year013
pHmaximum≤ 9 SUall year013
Solids, total suspended30-day average≤ 35 mg/Lall year013
Solids, total suspendeddaily maximum≤ 70 mg/Lall year013
Arsenic, total recoverable30-day averagereport only (ug/L)all year013
Iron, total recoverable30-day average≤ 1000 ug/Lall year013
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year013
Selenium, total recoverable30-day averagereport only (ug/L)all year013
Nickel, total recoverable30-day averagereport only (ug/L)all year013
Zinc, total recoverable30-day averagereport only (ug/L)all year013
Cadmium, total recoverable30-day averagereport only (ug/L)all year013
Chromium, total recoverable30-day averagereport only (ug/L)all year013
Chromium, total recoverabledaily maximumreport only (ug/L)all year013
Copper, total recoverable30-day averagereport only (ug/L)all year013
Zinc, potentially dissolved30-day averagereport only (ug/L)all year013
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year013
Copper, potentially dissolved30-day averagereport only (ug/L)all year013
Copper, potentially dissolveddaily maximumreport only (ug/L)all year013
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year013
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year013
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year013
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year013
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year013
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year013
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year013
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year013
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year013
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year013
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year013
Manganese, total recoverable30-day averagereport only (ug/L)all year013
Flow, in conduit or thru treatment plant30-day average≤ .61 MGDall year013
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year013
Mercury, total [low level]30-day averagereport only (ug/L)all year013
pHminimum≥ 6.5 SUall year014
pHmaximum≤ 9 SUall year014
Solids, total suspended30-day average≤ 35 mg/Lall year014
Solids, total suspendeddaily maximum≤ 70 mg/Lall year014
Arsenic, total recoverable30-day averagereport only (ug/L)all year014
Iron, total recoverable30-day average≤ 1000 ug/Lall year014
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year014
Selenium, total recoverable30-day averagereport only (ug/L)all year014
Zinc, total recoverable30-day averagereport only (ug/L)all year014
Cadmium, total recoverable30-day averagereport only (ug/L)all year014
Chromium, total recoverable30-day averagereport only (ug/L)all year014
Chromium, total recoverabledaily maximumreport only (ug/L)all year014
Copper, total recoverable30-day averagereport only (ug/L)all year014
Zinc, potentially dissolved30-day averagereport only (ug/L)all year014
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year014
Copper, potentially dissolved30-day averagereport only (ug/L)all year014
Copper, potentially dissolveddaily maximumreport only (ug/L)all year014
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year014
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year014
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year014
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year014
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year014
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year014
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year014
Chromium, trivalent total recoverable30-day averagereport only (mg/L)all year014
Chromium, trivalent total recoverabledaily maximumreport only (mg/L)all year014
Manganese, total recoverable30-day averagereport only (ug/L)all year014
Flow, in conduit or thru treatment plant30-day average≤ .43 MGDall year014
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year014
Mercury, total [low level]30-day averagereport only (ug/L)all year014
pHminimum≥ 6.5 SUall year021
pHmaximum≤ 9 SUall year021
Solids, total suspended30-day average≤ 35 mg/Lall year021
Solids, total suspendeddaily maximum≤ 70 mg/Lall year021
Arsenic, total recoverable30-day averagereport only (ug/L)all year021
Iron, total recoverable30-day average≤ 3000 ug/Lall year021
Iron, total recoverable30-day average≤ 1000 ug/Lall year021
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year021
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year021
Zinc, potentially dissolved30-day averagereport only (ug/L)all year021
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year021
Copper, potentially dissolved30-day averagereport only (ug/L)all year021
Copper, potentially dissolveddaily maximumreport only (ug/L)all year021
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year021
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year021
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year021
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year021
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year021
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year021
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year021
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year021
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year021
Flow, in conduit or thru treatment plant30-day average≤ 1.3 MGDall year021
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year021
Mercury, total [low level]30-day averagereport only (ug/L)all year021
pHminimum≥ 6.5 SUall year022
pHmaximum≤ 9 SUall year022
Solids, total suspended30-day average≤ 35 mg/Lall year022
Solids, total suspendeddaily maximum≤ 70 mg/Lall year022
Arsenic, total recoverable30-day averagereport only (ug/L)all year022
Iron, total recoverable30-day average≤ 3000 ug/Lall year022
Iron, total recoverable30-day average≤ 1000 ug/Lall year022
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year022
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year022
Zinc, potentially dissolved30-day averagereport only (ug/L)all year022
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year022
Copper, potentially dissolved30-day averagereport only (ug/L)all year022
Copper, potentially dissolveddaily maximumreport only (ug/L)all year022
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year022
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year022
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year022
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year022
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year022
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year022
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year022
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year022
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year022
Flow, in conduit or thru treatment plant30-day average≤ .63 MGDall year022
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year022
Mercury, total [low level]30-day averagereport only (ug/L)all year022
pHminimum≥ 6.5 SUall year023
pHmaximum≤ 9 SUall year023
Solids, total suspended30-day average≤ 35 mg/Lall year023
Solids, total suspendeddaily maximum≤ 70 mg/Lall year023
Arsenic, total recoverable30-day averagereport only (ug/L)all year023
Iron, total recoverable30-day average≤ 3000 ug/Lall year023
Iron, total recoverable30-day average≤ 1000 ug/Lall year023
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year023
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year023
Zinc, potentially dissolved30-day averagereport only (ug/L)all year023
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year023
Copper, potentially dissolved30-day averagereport only (ug/L)all year023
Copper, potentially dissolveddaily maximumreport only (ug/L)all year023
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year023
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year023
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year023
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year023
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year023
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year023
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year023
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year023
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year023
Flow, in conduit or thru treatment plant30-day average≤ 1.14 MGDall year023
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year023
Mercury, total [low level]30-day averagereport only (ug/L)all year023
pHminimum≥ 6.5 SUall year024
pHmaximum≤ 9 SUall year024
Solids, total suspended30-day average≤ 35 mg/Lall year024
Solids, total suspendeddaily maximum≤ 70 mg/Lall year024
Arsenic, total recoverable30-day averagereport only (ug/L)all year024
Iron, total recoverable30-day average≤ 3000 ug/Lall year024
Iron, total recoverable30-day average≤ 1000 ug/Lall year024
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year024
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year024
Zinc, potentially dissolved30-day averagereport only (ug/L)all year024
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year024
Copper, potentially dissolved30-day averagereport only (ug/L)all year024
Copper, potentially dissolveddaily maximumreport only (ug/L)all year024
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year024
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year024
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year024
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year024
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year024
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year024
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year024
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year024
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year024
Flow, in conduit or thru treatment plant30-day average≤ .12 MGDall year024
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year024
Mercury, total [low level]30-day averagereport only (ug/L)all year024
pHminimum≥ 6.5 SUall year025
pHmaximum≤ 9 SUall year025
Solids, total suspended30-day average≤ 35 mg/Lall year025
Solids, total suspendeddaily maximum≤ 70 mg/Lall year025
Arsenic, total recoverable30-day averagereport only (ug/L)all year025
Iron, total recoverable30-day average≤ 3000 ug/Lall year025
Iron, total recoverable30-day average≤ 1000 ug/Lall year025
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year025
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year025
Zinc, potentially dissolved30-day averagereport only (ug/L)all year025
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year025
Copper, potentially dissolved30-day averagereport only (ug/L)all year025
Copper, potentially dissolveddaily maximumreport only (ug/L)all year025
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year025
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year025
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year025
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year025
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year025
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year025
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year025
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year025
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year025
Flow, in conduit or thru treatment plant30-day average≤ 2.16 MGDall year025
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year025
Mercury, total [low level]30-day averagereport only (ug/L)all year025
pHminimum≥ 6.5 SUall year027
pHmaximum≤ 9 SUall year027
Solids, total suspended30-day average≤ 35 mg/Lall year027
Solids, total suspendeddaily maximum≤ 70 mg/Lall year027
Chloride [as Cl]30-day averagereport only (mg/L)all year027
Arsenic, total recoverable30-day averagereport only (ug/L)all year027
Iron, total recoverable30-day average≤ 3000 ug/Lall year027
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year027
Nickel, total recoverable30-day averagereport only (ug/L)all year027
Cadmium, total recoverabledaily maximumreport only (ug/L)all year027
Lead, total recoverabledaily maximumreport only (ug/L)all year027
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year027
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year027
Zinc, potentially dissolved30-day averagereport only (ug/L)all year027
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year027
Silver, potentially dissolved30-day averagereport only (ug/L)all year027
Silver, potentially dissolveddaily maximumreport only (ug/L)all year027
Copper, potentially dissolved30-day averagereport only (ug/L)all year027
Copper, potentially dissolveddaily maximumreport only (ug/L)all year027
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year027
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year027
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year027
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year027
Lead, potentially dissolvd30-day averagereport only (ug/L)all year027
Lead, potentially dissolvddaily maximumreport only (ug/L)all year027
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year027
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year027
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year027
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year027
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year027
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year027
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year027
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year027
Uranium, total30-day averagereport only (ug/L)all year027
Flow, in conduit or thru treatment plant30-day average≤ 4.75 MGDall year027
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year027
Mercury, total [low level]30-day averagereport only (ug/L)all year027
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year027
Boron, total30-day averagereport only (mg/L)all year027
pHminimum≥ 6.5 SUall year028
pHmaximum≤ 9 SUall year028
Solids, total suspended30-day average≤ 35 mg/Lall year028
Solids, total suspendeddaily maximum≤ 70 mg/Lall year028
Chloride [as Cl]30-day averagereport only (mg/L)all year028
Arsenic, total recoverable30-day averagereport only (ug/L)all year028
Iron, total recoverable30-day average≤ 3000 ug/Lall year028
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year028
Nickel, total recoverable30-day averagereport only (ug/L)all year028
Cadmium, total recoverabledaily maximumreport only (ug/L)all year028
Lead, total recoverabledaily maximumreport only (ug/L)all year028
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year028
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year028
Zinc, potentially dissolved30-day averagereport only (ug/L)all year028
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year028
Silver, potentially dissolved30-day averagereport only (ug/L)all year028
Silver, potentially dissolveddaily maximumreport only (ug/L)all year028
Copper, potentially dissolved30-day averagereport only (ug/L)all year028
Copper, potentially dissolveddaily maximumreport only (ug/L)all year028
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year028
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year028
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year028
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year028
Lead, potentially dissolvd30-day averagereport only (ug/L)all year028
Lead, potentially dissolvddaily maximumreport only (ug/L)all year028
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year028
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year028
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year028
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year028
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year028
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year028
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year028
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year028
Uranium, total30-day averagereport only (ug/L)all year028
Flow, in conduit or thru treatment plant30-day average≤ 2.31 MGDall year028
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year028
Mercury, total [low level]30-day averagereport only (ug/L)all year028
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year028
Boron, total30-day averagereport only (mg/L)all year028
pHminimum≥ 6.5 SUall year029
pHmaximum≤ 9 SUall year029
Solids, total suspended30-day average≤ 35 mg/Lall year029
Solids, total suspendeddaily maximum≤ 70 mg/Lall year029
Chloride [as Cl]30-day averagereport only (mg/L)all year029
Arsenic, total recoverable30-day averagereport only (ug/L)all year029
Iron, total recoverable30-day average≤ 3000 ug/Lall year029
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year029
Nickel, total recoverable30-day averagereport only (ug/L)all year029
Cadmium, total recoverabledaily maximumreport only (ug/L)all year029
Lead, total recoverabledaily maximumreport only (ug/L)all year029
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year029
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year029
Zinc, potentially dissolved30-day averagereport only (ug/L)all year029
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year029
Silver, potentially dissolved30-day averagereport only (ug/L)all year029
Silver, potentially dissolveddaily maximumreport only (ug/L)all year029
Copper, potentially dissolved30-day averagereport only (ug/L)all year029
Copper, potentially dissolveddaily maximumreport only (ug/L)all year029
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year029
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year029
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year029
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year029
Lead, potentially dissolvd30-day averagereport only (ug/L)all year029
Lead, potentially dissolvddaily maximumreport only (ug/L)all year029
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year029
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year029
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year029
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year029
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year029
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year029
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year029
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year029
Uranium, total30-day averagereport only (ug/L)all year029
Flow, in conduit or thru treatment plant30-day average≤ .375 MGDall year029
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year029
Mercury, total [low level]30-day averagereport only (ug/L)all year029
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year029
Boron, total30-day averagereport only (mg/L)all year029
pHminimum≥ 6.5 SUall year030
pHmaximum≤ 9 SUall year030
Solids, total suspended30-day average≤ 35 mg/Lall year030
Solids, total suspendeddaily maximum≤ 70 mg/Lall year030
Chloride [as Cl]30-day averagereport only (mg/L)all year030
Arsenic, total recoverable30-day averagereport only (ug/L)all year030
Iron, total recoverable30-day average≤ 3000 ug/Lall year030
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year030
Nickel, total recoverable30-day averagereport only (ug/L)all year030
Cadmium, total recoverabledaily maximumreport only (ug/L)all year030
Lead, total recoverabledaily maximumreport only (ug/L)all year030
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year030
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year030
Zinc, potentially dissolved30-day averagereport only (ug/L)all year030
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year030
Silver, potentially dissolved30-day averagereport only (ug/L)all year030
Silver, potentially dissolveddaily maximumreport only (ug/L)all year030
Copper, potentially dissolved30-day averagereport only (ug/L)all year030
Copper, potentially dissolveddaily maximumreport only (ug/L)all year030
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year030
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year030
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year030
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year030
Lead, potentially dissolvd30-day averagereport only (ug/L)all year030
Lead, potentially dissolvddaily maximumreport only (ug/L)all year030
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year030
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year030
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year030
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year030
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year030
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year030
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year030
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year030
Uranium, total30-day averagereport only (ug/L)all year030
Flow, in conduit or thru treatment plant30-day average≤ 2.53 MGDall year030
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year030
Mercury, total [low level]30-day averagereport only (ug/L)all year030
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year030
Boron, total30-day averagereport only (mg/L)all year030
pHminimum≥ 6.5 SUall year031
pHmaximum≤ 9 SUall year031
Solids, total suspended30-day average≤ 35 mg/Lall year031
Solids, total suspendeddaily maximum≤ 70 mg/Lall year031
Chloride [as Cl]30-day averagereport only (mg/L)all year031
Arsenic, total recoverable30-day averagereport only (ug/L)all year031
Iron, total recoverable30-day average≤ 3000 ug/Lall year031
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year031
Nickel, total recoverable30-day averagereport only (ug/L)all year031
Cadmium, total recoverabledaily maximumreport only (ug/L)all year031
Lead, total recoverabledaily maximumreport only (ug/L)all year031
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year031
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year031
Zinc, potentially dissolved30-day averagereport only (ug/L)all year031
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year031
Silver, potentially dissolved30-day averagereport only (ug/L)all year031
Silver, potentially dissolveddaily maximumreport only (ug/L)all year031
Copper, potentially dissolved30-day averagereport only (ug/L)all year031
Copper, potentially dissolveddaily maximumreport only (ug/L)all year031
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year031
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year031
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year031
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year031
Lead, potentially dissolvd30-day averagereport only (ug/L)all year031
Lead, potentially dissolvddaily maximumreport only (ug/L)all year031
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year031
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year031
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year031
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year031
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year031
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year031
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year031
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year031
Uranium, total30-day averagereport only (ug/L)all year031
Flow, in conduit or thru treatment plant30-day average≤ .704 MGDall year031
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year031
Mercury, total [low level]30-day averagereport only (ug/L)all year031
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year031
Boron, total30-day averagereport only (mg/L)all year031
pHminimum≥ 6.5 SUall year032
pHmaximum≤ 9 SUall year032
Solids, total suspended30-day average≤ 35 mg/Lall year032
Solids, total suspendeddaily maximum≤ 70 mg/Lall year032
Chloride [as Cl]30-day averagereport only (mg/L)all year032
Arsenic, total recoverable30-day averagereport only (ug/L)all year032
Iron, total recoverable30-day average≤ 3000 ug/Lall year032
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year032
Nickel, total recoverable30-day averagereport only (ug/L)all year032
Cadmium, total recoverabledaily maximumreport only (ug/L)all year032
Lead, total recoverabledaily maximumreport only (ug/L)all year032
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year032
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year032
Zinc, potentially dissolved30-day averagereport only (ug/L)all year032
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year032
Silver, potentially dissolved30-day averagereport only (ug/L)all year032
Silver, potentially dissolveddaily maximumreport only (ug/L)all year032
Copper, potentially dissolved30-day averagereport only (ug/L)all year032
Copper, potentially dissolveddaily maximumreport only (ug/L)all year032
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year032
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year032
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year032
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year032
Lead, potentially dissolvd30-day averagereport only (ug/L)all year032
Lead, potentially dissolvddaily maximumreport only (ug/L)all year032
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year032
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year032
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year032
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year032
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year032
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year032
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year032
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year032
Uranium, total30-day averagereport only (ug/L)all year032
Flow, in conduit or thru treatment plant30-day average≤ 2.31 MGDall year032
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year032
Mercury, total [low level]30-day averagereport only (ug/L)all year032
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year032
Boron, total30-day averagereport only (mg/L)all year032
pHminimum≥ 6.5 SUall year033
pHmaximum≤ 9 SUall year033
Solids, total suspended30-day average≤ 35 mg/Lall year033
Solids, total suspendeddaily maximum≤ 70 mg/Lall year033
Chloride [as Cl]30-day averagereport only (mg/L)all year033
Arsenic, total recoverable30-day averagereport only (ug/L)all year033
Iron, total recoverable30-day average≤ 3000 ug/Lall year033
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year033
Nickel, total recoverable30-day averagereport only (ug/L)all year033
Cadmium, total recoverabledaily maximumreport only (ug/L)all year033
Lead, total recoverabledaily maximumreport only (ug/L)all year033
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year033
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year033
Zinc, potentially dissolved30-day averagereport only (ug/L)all year033
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year033
Silver, potentially dissolved30-day averagereport only (ug/L)all year033
Silver, potentially dissolveddaily maximumreport only (ug/L)all year033
Copper, potentially dissolved30-day averagereport only (ug/L)all year033
Copper, potentially dissolveddaily maximumreport only (ug/L)all year033
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year033
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year033
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year033
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year033
Lead, potentially dissolvd30-day averagereport only (ug/L)all year033
Lead, potentially dissolvddaily maximumreport only (ug/L)all year033
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year033
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year033
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year033
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year033
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year033
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year033
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year033
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year033
Uranium, total30-day averagereport only (ug/L)all year033
Flow, in conduit or thru treatment plant30-day average≤ 2.06 MGDall year033
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year033
Mercury, total [low level]30-day averagereport only (ug/L)all year033
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year033
Boron, total30-day averagereport only (mg/L)all year033
pHminimum≥ 6.5 SUall year034
pHmaximum≤ 9 SUall year034
Solids, total suspended30-day average≤ 35 mg/Lall year034
Solids, total suspendeddaily maximum≤ 70 mg/Lall year034
Chloride [as Cl]30-day averagereport only (mg/L)all year034
Arsenic, total recoverable30-day averagereport only (ug/L)all year034
Iron, total recoverable30-day average≤ 3000 ug/Lall year034
Iron, total recoverabledaily maximum≤ 6000 ug/Lall year034
Nickel, total recoverable30-day averagereport only (ug/L)all year034
Cadmium, total recoverabledaily maximumreport only (ug/L)all year034
Lead, total recoverabledaily maximumreport only (ug/L)all year034
Chromium, hexavalent dissolved [as Cr]30-day averagereport only (ug/L)all year034
Chromium, hexavalent dissolved [as Cr]daily maximumreport only (ug/L)all year034
Zinc, potentially dissolved30-day averagereport only (ug/L)all year034
Zinc, potentially dissolveddaily maximumreport only (ug/L)all year034
Silver, potentially dissolved30-day averagereport only (ug/L)all year034
Silver, potentially dissolveddaily maximumreport only (ug/L)all year034
Copper, potentially dissolved30-day averagereport only (ug/L)all year034
Copper, potentially dissolveddaily maximumreport only (ug/L)all year034
Cadmium, potentially dissolvd30-day averagereport only (ug/L)all year034
Cadmium, potentially dissolvddaily maximumreport only (ug/L)all year034
Chromium, trivalent, potentially dissolvd30-day averagereport only (ug/L)all year034
Chromium, trivalent, potentially dissolvddaily maximumreport only (ug/L)all year034
Lead, potentially dissolvd30-day averagereport only (ug/L)all year034
Lead, potentially dissolvddaily maximumreport only (ug/L)all year034
Manganese, potentially dissolvd30-day averagereport only (ug/L)all year034
Manganese, potentially dissolvddaily maximumreport only (ug/L)all year034
Nickel, potentially dissolvd30-day averagereport only (ug/L)all year034
Nickel, potentially dissolvddaily maximumreport only (ug/L)all year034
Selenium, potentially dissolvd30-day averagereport only (ug/L)all year034
Selenium, potentially dissolvddaily maximumreport only (ug/L)all year034
Chromium, trivalent total recoverable30-day averagereport only (ug/L)all year034
Chromium, trivalent total recoverabledaily maximumreport only (ug/L)all year034
Uranium, total30-day averagereport only (ug/L)all year034
Flow, in conduit or thru treatment plant30-day average≤ .078 MGDall year034
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year034
Mercury, total [low level]30-day averagereport only (ug/L)all year034
Sulfide-hydrogen sulfide [undissociated]30-day averagereport only (mg/L)all year034
Boron, total30-day averagereport only (mg/L)all year034

How strict are these limits?

Cited limits by parameter: Colorado's rules and the federal ones.

Same industry: the 19 Coal Mining permits in Colorado.

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Your permit document is the final word. As JSON: /api/v1/permits/CO0045161 · MCP: https://passage-data.com/mcp