DECKER COAL COMPANY

NPDES permit MT0024210 · Major NON-POTW · administratively continued, expires 2017-04-30 · 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 2017-04-30 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)
0of 42 forms filed late

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

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among MT permits in EPA's filings — check your permit).

Limits in force (129)

OutfallParameterStatisticLimitMonths
002Temperature, water deg. fahrenheit30DA AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Flow rate30DA AVG report only all year
002Flow rateINST MAX report only all year
002Flow rateDAILY MX report only all year
002Flow rateDAILY MX report only all year
002Specific conductance30DA AVG report only all year
002Specific conductanceDAILY MX report only all year
002Specific conductanceDAILY MX report only all year
002Specific conductanceDAILY MX report only all year
002Sulfate [as S]30DA AVG report only all year
002Sulfate [as S]DAILY MX report only all year
002Sulfate [as S]DAILY MX report only all year
002Sulfate [as S]DAILY MX report only all year
002pHMINIMUM >= 6 SU all year
002pHMINIMUM >= 6 SU all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002pHMAXIMUM <= 9 SU all year
002pHMAXIMUM <= 9 SU all year
002Solids, total suspended30DA AVG <= 35 mg/L all year
002Solids, total suspendedDAILY MX <= 70 mg/L all year
002Solids, settleableDAILY MX <= .5 mL/L all year
002Oil and grease, hexane extr methodINST MAX <= 10 mg/L all year
002Oil and grease, hexane extr methodINST MAX <= 10 mg/L all year
002Oil and grease, hexane extr methodINST MAX <= 10 mg/L all year
002Nitrogen, total [as N]30DA AVG report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]DAILY MX report only all year
002Nitrogen, total [as N]30DA AVG <= 44.54 lb/d all year
002Nitrogen, total [as N]DAILY MX <= 72.91 lb/d all year
002Nitrogen, total [as N]DAILY MX <= 72.91 lb/d all year
002Nitrogen, total [as N]DAILY MX <= 72.91 lb/d all year
002Nitrogen, ammonia total [as N]30DA AVG report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, ammonia total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]30DA AVG report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Nitrite + Nitrate total [as N]DAILY MX report only all year
002Phosphorus, total [as P]30DA AVG <= .45 mg/L all year
002Phosphorus, total [as P]DAILY MX <= .82 mg/L all year
002Phosphorus, total [as P]DAILY MX <= .82 mg/L all year
002Phosphorus, total [as P]DAILY MX <= .82 mg/L all year
002Sodium adsorption ratio30DA AVG <= 17.8 Ratio all year
002Sodium adsorption ratioDAILY MX <= 20.6 Ratio all year
002Sodium adsorption ratioDAILY MX <= 20.6 Ratio all year
002Sodium adsorption ratioDAILY MX <= 20.6 Ratio all year
002Arsenic, total recoverable30DA AVG report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Copper, total [as Cu]30DA AVG report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Copper, total [as Cu]DAILY MX report only all year
002Iron, total [as Fe]30DA AVG <= 3.5 mg/L all year
002Iron, total [as Fe]DAILY MX <= 7 mg/L all year
002Iron, total [as Fe]DAILY MX report only all year
002Iron, total [as Fe]DAILY MX report only all year
002Manganese, total [as Mn]MO AVG report only all year
002Manganese, total [as Mn]DAILY MX report only all year
002Manganese, total [as Mn]DAILY MX report only all year
002Manganese, total [as Mn]DAILY MX report only all year
002Nickel, total recoverable30DA AVG report only all year
002Nickel, total recoverableDAILY MX report only all year
002Nickel, total recoverableDAILY MX report only all year
002Nickel, total recoverableDAILY MX report only all year
002Silver total recoverable30DA AVG report only all year
002Silver total recoverableDAILY MX report only all year
002Silver total recoverableDAILY MX report only all year
002Silver total recoverableDAILY MX report only all year
002Strontium, total [as Sr]30DA AVG report only all year
002Strontium, total [as Sr]DAILY MX report only all year
002Strontium, total [as Sr]DAILY MX report only all year
002Strontium, total [as Sr]DAILY MX report only all year
002Zinc, total recoverable30DA AVG report only all year
002Zinc, total recoverableDAILY MX report only all year
002Zinc, total recoverableDAILY MX report only all year
002Zinc, total recoverableDAILY MX report only all year
002Aluminum, total [as Al]30DA AVG report only all year
002Aluminum, total [as Al]DAILY MX report only all year
002Aluminum, total [as Al]DAILY MX report only all year
002Aluminum, total [as Al]DAILY MX report only all year
002Aluminum, dissolved [as Al]30DA AVG <= .5 mg/L all year
002Aluminum, dissolved [as Al]DAILY MX <= .7 mg/L all year
002Aluminum, dissolved [as Al]DAILY MX <= .7 mg/L all year
002Aluminum, dissolved [as Al]DAILY MX <= .7 mg/L all year
002Cadmium, total recoverable30DA AVG report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Cadmium, total recoverableDAILY MX report only all year
002Lead, total recoverable30DA AVG report only all year
002Lead, total recoverableDAILY MX report only all year
002Lead, total recoverableDAILY MX report only all year
002Lead, total recoverableDN report only all year
002Chromium, total recoverable30DA AVG report only all year
002Chromium, total recoverableDAILY MX report only all year
002Chromium, total recoverableDAILY MX report only all year
002Chromium, total recoverableDAILY MX report only all year
002Copper, total recoverable30DA AVG report only all year
002Copper, total recoverableDAILY MX report only all year
002Copper, total recoverableDAILY MX report only all year
002Copper, total recoverableDAILY MX report only all year
002Solids, total dissolved [TDS]30DA AVG report only all year
002Solids, total dissolved [TDS]DAILY MX report only all year
002Solids, total dissolved [TDS]DAILY MX report only all year
002Solids, total dissolved [TDS]DAILY MX report only all year
002Mercury, total recoverable30DA AVG report only all year
002Mercury, total recoverableDAILY MX report only all year
002Mercury, total recoverableDAILY MX report only all year
002Mercury, total recoverableDAILY MX report only all year
002Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
002Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
002Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
002Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiaSINGSAMP <= 0 pass=0;fail=1 Jul, Aug, Sep, Oct, Nov, Dec
002Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiaSINGSAMP <= 0 pass=0;fail=1 Jul, Aug, Sep, Oct, Nov, Dec
002Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubiaSINGSAMP <= 0 pass=0;fail=1 Jul, Aug, Sep, Oct, Nov, Dec
002Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasSINGSAMP <= 0 pass=0;fail=1 Jan, Feb, Mar, Apr, May, Jun
002Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasSINGSAMP <= 0 pass=0;fail=1 Jan, Feb, Mar, Apr, May, Jun
002Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasSINGSAMP <= 0 pass=0;fail=1 Jan, Feb, Mar, Apr, May, Jun

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