Par Montana, LLC.

NPDES permit MT0000477 · Major NON-POTW · administratively continued, expires 2020-07-31 · 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 2020-07-31 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

1values over a limit
0required values missing, on 0 form(s)
0of 68 forms filed late

Last period with anything received: 2026-07-31. Most often over: Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas (1).

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 (203)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only all year
001Temperature, water deg. fahrenheitDAILY MX report only all year
001Flow rate30DA AVG report only all year
001Flow rateDAILY MX report only all year
001Oxygen, dissolved [DO]QRTR AVG report only Mar, Jun, Sep, Dec
001Oxygen, dissolved [DO]QB report only Mar, Jun, Sep, Dec
001BOD, 5-day, 20 deg. C30DA AVG report only all year
001BOD, 5-day, 20 deg. CDAILY MX report only all year
001BOD, 5-day, 20 deg. C30DA AVG <= 511 lb/d all year
001BOD, 5-day, 20 deg. CDAILY MX <= 919 lb/d all year
001Oxygen demand, chem. [high level] [COD]30DA AVG report only all year
001Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
001Oxygen demand, chem. [high level] [COD]30DA AVG <= 3558 lb/d all year
001Oxygen demand, chem. [high level] [COD]DAILY MX <= 6869 lb/d all year
001pHMINIMUM >= 6 SU all year
001pHMAXIMUM <= 9 SU all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Solids, total suspended30DA AVG <= 409 lb/d all year
001Solids, total suspendedDAILY MX <= 640 lb/d all year
001Solids, total suspended30DA AVG report only all year
001Solids, total suspendedDAILY MX report only all year
001Nitrogen, total [as N]30DA AVG report only all year
001Nitrogen, total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG report only all year
001Nitrogen, ammonia total [as N]DAILY MX report only all year
001Nitrogen, ammonia total [as N]30DA AVG <= 267 lb/d all year
001Nitrogen, ammonia total [as N]DAILY MX <= 587 lb/d all year
001Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
001Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
001Nitrite + Nitrate total [as N]30DA AVG report only all year
001Nitrite + Nitrate total [as N]DAILY MX report only all year
001Phosphorus, total [as P]30DA AVG report only all year
001Phosphorus, total [as P]DAILY MX report only all year
001Sulfide, total [as S]30DA AVG report only all year
001Sulfide, total [as S]DAILY MX report only all year
001Sulfide, total [as S]30DA AVG <= 2.6 lb/d all year
001Sulfide, total [as S]DAILY MX <= 5.8 lb/d all year
001Sulfide, dissolved, [as S]MO AVG report only all year
001Arsenic, total recoverable30DA AVG report only all year
001Arsenic, total recoverableDAILY MX report only all year
001Chromium, hexavalent [as Cr]30DA AVG report only all year
001Chromium, hexavalent [as Cr]DAILY MX report only all year
001Chromium, hexavalent [as Cr]30DA AVG <= .2 lb/d all year
001Chromium, hexavalent [as Cr]DAILY MX <= .43 lb/d all year
001Chromium, total [as Cr]30DA AVG report only all year
001Chromium, total [as Cr]DAILY MX report only all year
001Chromium, total [as Cr]30DA AVG <= 2.26 lb/d all year
001Chromium, total [as Cr]DAILY MX <= 5.8 lb/d all year
001Phenols30DA AVG report only all year
001PhenolsDAILY MX report only all year
001Phenols30DA AVG <= 1.97 lb/d all year
001PhenolsDAILY MX <= 6.9 lb/d all year
001Sulfide-hydrogen sulfide [undissociated]MO AVG report only all year
001Oil and grease visualINST MAX report only all year
001Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
001Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
001Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 all year
002Temperature, water deg. fahrenheit30DA AVG report only all year
002Temperature, water deg. fahrenheitDAILY MX report only all year
002Flow rate30DA AVG report only all year
002Flow rateDAILY MX report only all year
002pHMINIMUM >= 6 SU all year
002pHMAXIMUM <= 9 SU all year
002Oil & Grease30DA AVG report only all year
002Oil & GreaseDAILY MX report only all year
002Carbon, tot organic [TOC]DAILY MX report only all year
002Carbon, tot organic [TOC]DAILY MX report only all year
002Carbon, tot organic [TOC]DAILY MX <= 5 mg/L all year
002Arsenic, total recoverableMO AVG report only all year
002Arsenic, total recoverableDAILY MX report only all year
002Chlorine, total residualDAILY MX report only all year
002Oil and grease visualINST MAX report only all year
003Temperature, water deg. fahrenheitMO AVG report only all year
003Temperature, water deg. fahrenheitDAILY MX report only all year
003Flow rate30DA AVG report only all year
003Flow rateDAILY MX report only all year
003Oxygen, dissolved [DO]QRTR AVG report only Mar, Jun, Sep, Dec
003Oxygen, dissolved [DO]QB report only Mar, Jun, Sep, Dec
003BOD, 5-day, 20 deg. C30DA AVG report only all year
003BOD, 5-day, 20 deg. CDAILY MX report only all year
003BOD, 5-day, 20 deg. C30DA AVG <= 511 lb/d all year
003BOD, 5-day, 20 deg. CDAILY MX <= 919 lb/d all year
003Oxygen demand, chem. [high level] [COD]30DA AVG report only all year
003Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
003Oxygen demand, chem. [high level] [COD]30DA AVG <= 3558 lb/d all year
003Oxygen demand, chem. [high level] [COD]DAILY MX <= 6869 lb/d all year
003pHMINIMUM >= 6 SU all year
003pHMAXIMUM <= 9 SU all year
003Solids, total suspended30DA AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Solids, total suspended30DA AVG <= 409 lb/d all year
003Solids, total suspendedDAILY MX <= 640 lb/d all year
003Solids, total suspended30DA AVG report only all year
003Solids, total suspendedDAILY MX report only all year
003Oil & Grease30DA AVG report only all year
003Oil & GreaseDAILY MX <= 10 mg/L all year
003Oil & Grease30DA AVG <= 148 lb/d all year
003Oil & GreaseDAILY MX <= 279 lb/d all year
003Nitrogen, total [as N]30DA AVG report only all year
003Nitrogen, total [as N]DAILY MX report only all year
003Nitrogen, ammonia total [as N]30DA AVG report only all year
003Nitrogen, ammonia total [as N]DAILY MX report only all year
003Nitrogen, ammonia total [as N]30DA AVG <= 267 lb/d all year
003Nitrogen, ammonia total [as N]DAILY MX <= 587 lb/d all year
003Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
003Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
003Nitrite + Nitrate total [as N]30DA AVG report only all year
003Nitrite + Nitrate total [as N]DAILY MX report only all year
003Phosphorus, total [as P]30DA AVG report only all year
003Phosphorus, total [as P]DAILY MX report only all year
003Sulfide, total [as S]30DA AVG report only all year
003Sulfide, total [as S]DAILY MX report only all year
003Sulfide, total [as S]30DA AVG <= 2.6 lb/d all year
003Sulfide, total [as S]DAILY MX <= 5.8 lb/d all year
003Sulfide, dissolved, [as S]MO AVG report only all year
003Arsenic, total recoverable30DA AVG report only all year
003Arsenic, total recoverableDAILY MX report only all year
003Chromium, hexavalent [as Cr]30DA AVG report only all year
003Chromium, hexavalent [as Cr]DAILY MX report only all year
003Chromium, hexavalent [as Cr]30DA AVG <= .2 lb/d all year
003Chromium, hexavalent [as Cr]DAILY MX <= .43 lb/d all year
003Chromium, total [as Cr]30DA AVG report only all year
003Chromium, total [as Cr]DAILY MX report only all year
003Chromium, total [as Cr]30DA AVG <= 2.26 lb/d all year
003Chromium, total [as Cr]DAILY MX <= 6.52 lb/d all year
003Phenols30DA AVG report only all year
003PhenolsDAILY MX report only all year
003Phenols30DA AVG <= 1.97 lb/d all year
003PhenolsDAILY MX <= 6.9 lb/d all year
003Sulfide-hydrogen sulfide [undissociated]MO AVG report only all year
003Volatile Organic Compound [VOC]30DA AVG report only all year
003Volatile Organic Compound [VOC]DAILY MX report only all year
003Base neutrals & acid [Method 625], efflnt30DA AVG report only all year
003Base neutrals & acid [Method 625], efflntDAILY MX report only all year
003Oil and grease visualINST MAX report only all year
003Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
003Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 all year
004Temperature, water deg. fahrenheitMO AVG report only all year
004Temperature, water deg. fahrenheitDAILY MX report only all year
004Flow rate30DA AVG report only all year
004Flow rateDAILY MX report only all year
004Oxygen, dissolved [DO]QRTR AVG report only Mar, Jun, Sep, Dec
004Oxygen, dissolved [DO]QB report only Mar, Jun, Sep, Dec
004BOD, 5-day, 20 deg. C30DA AVG report only all year
004BOD, 5-day, 20 deg. CDAILY MX report only all year
004BOD, 5-day, 20 deg. C30DA AVG <= 511 lb/d all year
004BOD, 5-day, 20 deg. CDAILY MX <= 919 lb/d all year
004Oxygen demand, chem. [high level] [COD]30DA AVG report only all year
004Oxygen demand, chem. [high level] [COD]DAILY MX report only all year
004Oxygen demand, chem. [high level] [COD]30DA AVG <= 3558 lb/d all year
004Oxygen demand, chem. [high level] [COD]DAILY MX <= 6869 lb/d all year
004pHMINIMUM >= 6 SU all year
004pHMAXIMUM <= 9 SU all year
004Solids, total suspended30DA AVG report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspended30DA AVG report only all year
004Solids, total suspendedDAILY MX report only all year
004Solids, total suspended30DA AVG <= 409 lb/d all year
004Solids, total suspendedDAILY MX <= 640 lb/d all year
004Solids, total suspended30DA AVG report only all year
004Solids, total suspendedDAILY MX report only all year
004Oil and grease, hexane extr methodDAILY MX <= 10 mg/L all year
004Oil and grease, hexane extr methodMO AVG <= 148 lb/d all year
004Oil and grease, hexane extr methodDAILY MX <= 279 lb/d all year
004Nitrogen, total [as N]30DA AVG report only all year
004Nitrogen, total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]30DA AVG report only all year
004Nitrogen, ammonia total [as N]DAILY MX report only all year
004Nitrogen, ammonia total [as N]30DA AVG <= 267 lb/d all year
004Nitrogen, ammonia total [as N]DAILY MX <= 587 lb/d all year
004Nitrogen, Kjeldahl, total [as N]30DA AVG report only all year
004Nitrogen, Kjeldahl, total [as N]DAILY MX report only all year
004Nitrite + Nitrate total [as N]30DA AVG report only all year
004Nitrite + Nitrate total [as N]DAILY MX report only all year
004Phosphorus, total [as P]30DA AVG report only all year
004Phosphorus, total [as P]DAILY MX report only all year
004Sulfide, total [as S]30DA AVG report only all year
004Sulfide, total [as S]DAILY MX report only all year
004Sulfide, total [as S]30DA AVG <= 2.6 lb/d all year
004Sulfide, total [as S]DAILY MX <= 5.8 lb/d all year
004Sulfide, dissolved, [as S]MO AVG report only all year
004Arsenic, total recoverable30DA AVG report only all year
004Arsenic, total recoverableDAILY MX report only all year
004Chromium, hexavalent [as Cr]30DA AVG report only all year
004Chromium, hexavalent [as Cr]DAILY MX report only all year
004Chromium, hexavalent [as Cr]30DA AVG <= .2 lb/d all year
004Chromium, hexavalent [as Cr]DAILY MX <= .43 lb/d all year
004Chromium, total [as Cr]30DA AVG report only all year
004Chromium, total [as Cr]DAILY MX report only all year
004Chromium, total [as Cr]30DA AVG <= 2.26 lb/d all year
004Chromium, total [as Cr]DAILY MX <= 6.52 lb/d all year
004Phenols30DA AVG report only all year
004PhenolsDAILY MX report only all year
004Phenols30DA AVG <= 1.97 lb/d all year
004PhenolsDAILY MX <= 6.9 lb/d all year
004Sulfide-hydrogen sulfide [undissociated]MO AVG report only all year
004Oil and grease visualINST MAX report only all year
004Report due [yrmoda]VALUE <= 1 abst=0;prst=1 all year
004Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaDAILY MX <= 0 pass=0;fail=1 all year
004Pass/Fail Static Renewal 96Hr Acute Pimephales PromelasDAILY MX <= 0 pass=0;fail=1 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