NPDES permit MT0031500 · Minor POTW · administratively continued, expires 2020-09-30 · EPA's file as of 2026-09-19
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This permit expired on 2020-09-30 and is administratively continued: its last limits keep applying until a new permit is issued, and EPA still expects the reports.
Last period with anything received: 2026-07-31.
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).
| Outfall | Parameter | Statistic | Limit | Months |
|---|---|---|---|---|
| 001 | Temperature, water deg. centigrade | MO MAX | report only | all year |
| 001 | Temperature, water deg. centigrade | SINGSAMP | report only | all year |
| 001 | Flow rate | WKLY AVG | report only | all year |
| 001 | Flow rate | DAILY MX | report only | all year |
| 001 | Oxygen, dissolved [DO] | MO AVG | report only | all year |
| 001 | BOD, 5-day, 20 deg. C | MO AVG | <= 30 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 45 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MO AVG | <= 40 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | MX WK AV | <= 60 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | MO AVG | report only | all year |
| 001 | pH | MINIMUM | >= 6 SU (alert) | all year |
| 001 | pH | MAXIMUM | <= 9 SU (alert) | all year |
| 001 | pH | SINGSAMP | report only | all year |
| 001 | Solids, total suspended | MN WK AV | report only | all year |
| 001 | Solids, total suspended | MO AVG | <= 45 mg/L | all year |
| 001 | Solids, total suspended | WKLY MAX | <= 65 mg/L | all year |
| 001 | Solids, total suspended | MO AVG | <= 60 lb/d | all year |
| 001 | Solids, total suspended | WKLY MAX | <= 87 lb/d | all year |
| 001 | Solids, total suspended | MO AVG | report only | all year |
| 001 | Oil and grease, hexane extr method | DAILY MX | report only | all year |
| 001 | Nitrogen, total [as N] | MO AVG | report only | Jul, Aug, Sep |
| 001 | Nitrogen, total [as N] | MO AVG | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Nitrogen, total [as N] | MO AVG | <= 15.6 lb/d | Jul, Aug, Sep |
| 001 | Nitrogen, total [as N] | MO AVG | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Nitrogen, total [as N] | SINGSAMP | report only | Jul, Aug, Sep |
| 001 | Nitrogen, ammonia total [as N] | MO MAX | report only | all year |
| 001 | Nitrogen, ammonia total [as N] | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Nitrogen, Kjeldahl, total [as N] | MO AVG | report only | all year |
| 001 | Nitrogen, Kjeldahl, total [as N] | SINGSAMP | report only | Jul, Aug, Sep |
| 001 | Nitrite + Nitrate total [as N] | MO AVG | report only | all year |
| 001 | Nitrite + Nitrate total [as N] | SINGSAMP | report only | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | MO AVG | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | MO AVG | report only | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | MO AVG | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | MO AVG | <= 3.88 lb/d | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | SINGSAMP | report only | Jul, Aug, Sep |
| 001 | Hardness, total [as CaCO3] | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Arsenic, total recoverable | MO AVG | report only | all year |
| 001 | Arsenic, total recoverable | DAILY MX | report only | all year |
| 001 | Arsenic, total recoverable | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Arsenic, total recoverable | SINGSAMP | report only | all year |
| 001 | Lead, total recoverable | MO AVG | report only | all year |
| 001 | Lead, total recoverable | DAILY MX | report only | all year |
| 001 | Lead, total recoverable | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Lead, total recoverable | SINGSAMP | report only | all year |
| 001 | Copper, total recoverable | MO AVG | report only | all year |
| 001 | Copper, total recoverable | DAILY MX | report only | all year |
| 001 | Copper, total recoverable | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Copper, total recoverable | SINGSAMP | report only | all year |
| 001 | Chlorine, total residual | MO AVG | <= .1 mg/L | all year |
| 001 | Chlorine, total residual | DAILY MX | <= .1 mg/L | all year |
| 001 | E. coli, colony forming units [CFU] | MO GEOMN | <= 126 CFU/100mL | Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | E. coli, colony forming units [CFU] | MO GEOMN | <= 630 CFU/100mL | Jan, Feb, Mar, Nov, Dec |
| 001 | E. coli, colony forming units [CFU] | WKLY MAX | <= 252 CFU/100mL | Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | E. coli, colony forming units [CFU] | WKLY MAX | <= 1260 CFU/100mL | Jan, Feb, Mar, Nov, Dec |
| 001 | Mercury, total recoverable | MO AVG | report only | all year |
| 001 | Mercury, total recoverable | DAILY MX | report only | all year |
| 001 | Mercury, total recoverable | SINGSAMP | report only | Mar, Jun, Sep, Dec |
| 001 | Mercury, total recoverable | SINGSAMP | report only | all year |
| 001 | BOD, 5-day, percent removal | MINIMUM | >= 85 % | all year |
| 001 | Solids, suspended percent removal | MINIMUM | >= 65 % | 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