Colo Div of Reclamation, Mining and Safety

NPDES permit CO0001244 · Minor NON-POTW · administratively continued, expires 2015-12-31 · EPA's file as of 2026-09-19

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This permit expired on 2015-12-31 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

5values over a limit
0required values missing, on 0 form(s)
1of 19 forms filed late

Last period with anything received: 2026-07-31. Most often over: Arsenic, total recoverable (5).

Reporting

Reports are due about 28 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (73)

OutfallParameterStatisticLimitMonths
001Oxygen demand, chem. [high level] [COD]30DA AVG <= 100 mg/L all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 200 mg/L all year
001pHMINIMUM >= 6.5 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG <= 20 mg/L all year
001Solids, total suspendedDAILY MX <= 30 mg/L all year
001Cyanide, weak acid, dissociableDAILY MX <= 5 ug/L all year
001Cyanide, weak acid, dissociableROLL AVG <= .75 ug/L all year
001Chloride [as Cl]30DA AVG <= 250 mg/L all year
001Chloride [as Cl]ROLL AVG <= 54 mg/L all year
001Sulfate, total [as SO4]30DA AVG <= 250 mg/L all year
001Sulfate, total [as SO4]ROLL AVG <= 131 mg/L all year
001FluorideDAILY MX <= 2 mg/L all year
001Arsenic, total recoverable30DA AVG <= .02 ug/L all year
001Arsenic, total recoverable30DA AVG report only all year
001Iron, total recoverable30DA AVG report only all year
001Iron, total recoverableROLL AVG report only all year
001Boron, total [as B]30DA AVG <= .75 mg/L all year
001Boron, total [as B]30DA AVG <= .46 mg/L all year
001Boron, total [as B]DAILY MX report only all year
001Iron, dissolved [as Fe]30DA AVG <= 300 ug/L all year
001Iron, dissolved [as Fe]ROLL AVG <= 45 ug/L all year
001Manganese, dissolved [as Mn]30DA AVG <= 50 ug/L all year
001Manganese, dissolved [as Mn]ROLL AVG <= 7.5 ug/L all year
001Thallium, total [as Tl]30DA AVG <= .24 ug/L all year
001Antimony, total [as Sb]30DA AVG <= 5.6 ug/L all year
001Chromium, hexavalent dissolved [as Cr]30DA AVG report only all year
001Chromium, hexavalent dissolved [as Cr]DAILY MX report only all year
001Zinc, potentially dissolved30DA AVG report only all year
001Zinc, potentially dissolvedDAILY MX report only all year
001Zinc, potentially dissolvedROLL AVG report only all year
001Silver, potentially dissolved30DA AVG <= .13 ug/L all year
001Silver, potentially dissolvedDAILY MX <= 3.5 ug/L all year
001Silver, potentially dissolvedROLL AVG <= .02 ug/L all year
001Copper, potentially dissolved30DA AVG <= 12 ug/L all year
001Copper, potentially dissolvedDAILY MX <= 18 ug/L all year
001Copper, potentially dissolvedROLL AVG <= 1.8 ug/L all year
001Cadmium, potentially dissolvd30DA AVG report only all year
001Cadmium, potentially dissolvdDAILY MX report only all year
001Nickel, potentially dissolvd30DA AVG report only all year
001Nickel, potentially dissolvdDAILY MX report only all year
001Nickel, potentially dissolvdROLL AVG report only all year
001Selenium, potentially dissolvd30DA AVG report only all year
001Selenium, potentially dissolvdDAILY MX report only all year
001Selenium, potentially dissolvdROLL AVG report only all year
001Oil and greaseINST MAX <= 10 mg/L all year
001Chromium, trivalent total recoverableDAILY MX <= 50 ug/L all year
001Chromium, trivalent total recoverableROLL AVG <= 7.5 ug/L all year
001Radium 226, total30DA AVG <= 10 pCi/L all year
001Radium 226, totalDAILY MX <= 30 pCi/L all year
001Radium 226, dissolved30DA AVG <= 3 pCi/L all year
001Radium 226, dissolvedDAILY MX <= 10 pCi/L all year
001Radium 226 + radium 228, total30DA AVG <= 5 pCi/L all year
001Uranium, total30DA AVG <= 30 ug/L all year
001Uranium, totalROLL AVG <= 22 ug/L all year
001Flow, in conduit or thru treatment plant30DA AVG <= .288 MGD all year
001Flow, in conduit or thru treatment plantDAILY MX report only all year
001Sulfide-hydrogen sulfide [undissociated]30DA AVG report only all year
001Sulfide-hydrogen sulfide [undissociated]ROLL AVG report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
001Toxicity [chronic], Ceriodaphnia dubiaMN VALUE report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]MN VALUE report only all year
001Solids, total dissolved30DA AVG report only all year
001Solids, total dissolvedDAILY MX report only all year
001Mercury, total [as Hg]30DA AVG report only all year
001Oil and grease visualINST MAX report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only all year
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 100 % all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only all year
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 100 % all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states