Mt Emmons Mining Co

NPDES permit CO0035394 · Major NON-POTW · administratively continued, expires 2013-08-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2013-08-31 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

0values over a limit
0required values missing, on 0 form(s)
2of 38 forms filed late

Last period with anything received: 2026-07-31.

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 (154)

OutfallParameterStatisticLimitMonths
001pHMINIMUM >= 6.5 SU Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001pHMINIMUM >= 6.5 SU Jul, Aug, Sep
001pHMAXIMUM <= 9 SU Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001pHMAXIMUM <= 9 SU Jul, Aug, Sep
001Solids, total suspended30DA AVG <= 30 mg/L Mar, Jun, Dec
001Solids, total suspended30DA AVG <= 30 mg/L Sep
001Solids, total suspendedMX 7D AV <= 45 mg/L Mar, Jun, Dec
001Solids, total suspendedMX 7D AV <= 45 mg/L Sep
001Arsenic, total [as As]30DA AVG report only Mar, Jun, Dec
001Arsenic, total [as As]30DA AVG report only Sep
001Arsenic, total [as As]DAILY MX report only Mar, Jun, Dec
001Arsenic, total [as As]DAILY MX report only Sep
001Aluminum, total recoverable30DA AVG report only Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Aluminum, total recoverable30DA AVG report only Jul, Aug, Sep
001Aluminum, total recoverableDAILY MX report only Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Aluminum, total recoverableDAILY MX report only Jul, Aug, Sep
001Zinc, potentially dissolved30DA AVG report only Mar, Jun, Dec
001Zinc, potentially dissolved30DA AVG report only Sep
001Zinc, potentially dissolvedDAILY MX <= 390 ug/L Mar, Jun, Dec
001Zinc, potentially dissolvedDAILY MX <= 390 ug/L Sep
001Copper, potentially dissolved30DA AVG report only Mar, Jun, Dec
001Copper, potentially dissolved30DA AVG report only Sep
001Copper, potentially dissolvedDAILY MX report only Mar, Jun, Dec
001Copper, potentially dissolvedDAILY MX report only Sep
001Cadmium, potentially dissolvd30DA AVG report only Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Cadmium, potentially dissolvd30DA AVG report only Jul, Aug, Sep
001Cadmium, potentially dissolvdDAILY MX <= 1.9 ug/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Cadmium, potentially dissolvdDAILY MX <= 1.9 ug/L Jul, Aug, Sep
001Lead, potentially dissolvd30DA AVG report only Mar, Jun, Dec
001Lead, potentially dissolvd30DA AVG report only Sep
001Lead, potentially dissolvdDAILY MX report only Mar, Jun, Dec
001Lead, potentially dissolvdDAILY MX report only Sep
001Oil and greaseINST MAX <= 10 mg/L Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Oil and greaseINST MAX <= 10 mg/L Jul, Aug, Sep
001Flow, in conduit or thru treatment plant30DA AVG <= .675 MGD Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Flow, in conduit or thru treatment plant30DA AVG <= .75 MGD Jul, Aug, Sep
001Flow, in conduit or thru treatment plantDAILY MX report only Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec
001Flow, in conduit or thru treatment plantDAILY MX report only Jul, Aug, Sep
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Sep
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Sep
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Sep
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Ceriodaphnia dubiaSINGSAMP report only Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Sep
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Mar, Jun, Dec
001Toxicity [chronic], Pimephales promelas [Fathead Minnow]SINGSAMP report only Sep
001Solids, total dissolved30DA AVG report only Mar, Jun, Dec
001Solids, total dissolved30DA AVG report only Sep
001Solids, total dissolvedINST MAX report only Mar, Jun, Dec
001Solids, total dissolvedINST MAX report only Sep
001Mercury, total [as Hg]30DA AVG report only Mar, Jun, Dec
001Mercury, total [as Hg]30DA AVG report only Sep
001Mercury, total [as Hg]DAILY MX report only Mar, Jun, Dec
001Mercury, total [as Hg]DAILY MX report only Sep
001Oil and grease visualINST MAX report only Mar, Jun, Dec
001Oil and grease visualINST MAX report only Sep
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only Sep
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only Mar, Jun, Dec
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaSINGSAMP report only Sep
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only Mar, Jun, Dec
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE report only Sep
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 48 % Mar, Jun, Dec
001%Effect Static Renewal 7 Day Chronic Ceriodaphnia dubiaMN VALUE >= 43 % Sep
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only Mar, Jun, Dec
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only Sep
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only Mar, Jun, Dec
001%Effect Static Renewal 7Day Chronic Pimephales promelasSINGSAMP report only Sep
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only Mar, Jun, Dec
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE report only Sep
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 48 % Mar, Jun, Dec
001%Effect Static Renewal 7Day Chronic Pimephales promelasMN VALUE >= 43 % Sep
MONpHMINIMUM report only Mar, Jun, Sep, Dec
MONpHMINIMUM report only Mar, Jun, Sep, Dec
MONpHMAXIMUM report only Mar, Jun, Sep, Dec
MONpHMAXIMUM report only Mar, Jun, Sep, Dec
MONIron, total recoverable30DA AVG report only all year
MONIron, total recoverable30DA AVG report only Mar, Jun, Sep, Dec
MONIron, total recoverable30DA AVG report only Mar, Jun, Sep, Dec
MONIron, total recoverableDAILY MX report only all year
MONIron, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
MONIron, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
MONArsenic, total [as As]30DA AVG report only Mar, Jun, Sep, Dec
MONArsenic, total [as As]30DA AVG report only Mar, Jun, Sep, Dec
MONArsenic, total [as As]DAILY MX report only Mar, Jun, Sep, Dec
MONArsenic, total [as As]DAILY MX report only Mar, Jun, Sep, Dec
MONAluminum, total recoverable30DA AVG report only Mar, Jun, Sep, Dec
MONAluminum, total recoverable30DA AVG report only Mar, Jun, Sep, Dec
MONAluminum, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
MONAluminum, total recoverableDAILY MX report only Mar, Jun, Sep, Dec
MONZinc, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONZinc, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONZinc, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONZinc, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONSilver, potentially dissolved30DA AVG report only all year
MONSilver, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONSilver, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONSilver, potentially dissolvedDAILY MX report only all year
MONSilver, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONSilver, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONCopper, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONCopper, potentially dissolved30DA AVG report only Mar, Jun, Sep, Dec
MONCopper, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONCopper, potentially dissolvedDAILY MX report only Mar, Jun, Sep, Dec
MONCadmium, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONCadmium, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONCadmium, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONCadmium, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONChromium, trivalent, potentially dissolvd30DA AVG report only all year
MONChromium, trivalent, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONChromium, trivalent, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONChromium, trivalent, potentially dissolvdDAILY MX report only all year
MONChromium, trivalent, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONChromium, trivalent, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONLead, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONLead, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONLead, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONLead, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONManganese, potentially dissolvd30DA AVG report only all year
MONManganese, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONManganese, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONManganese, potentially dissolvdDAILY MX report only all year
MONManganese, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONManganese, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONNickel, potentially dissolvd30DA AVG report only all year
MONNickel, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONNickel, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONNickel, potentially dissolvdDAILY MX report only all year
MONNickel, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONNickel, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONSelenium, potentially dissolvd30DA AVG report only all year
MONSelenium, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONSelenium, potentially dissolvd30DA AVG report only Mar, Jun, Sep, Dec
MONSelenium, potentially dissolvdDAILY MX report only all year
MONSelenium, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONSelenium, potentially dissolvdDAILY MX report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plant30DA AVG report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plant30DA AVG report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plantDAILY MX report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plantDAILY MX report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plant30DA AVG report only Mar, Jun, Sep, Dec
MONFlow, in conduit or thru treatment plantDAILY MX report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]30DA AVG report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]30DA AVG report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]DAILY MX report only Mar, Jun, Sep, Dec
MONMercury, total [as Hg]DAILY MX report only Mar, Jun, Sep, Dec

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