NPDES permit MT0021938 · Major POTW · administratively continued, expires 2020-07-31 · EPA's file as of 2026-09-19
Check this month's numbers before you fileThis 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.
Last period with anything received: 2026-07-31. Most often over: BOD, 5-day, 20 deg. C (4).
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 | 30DA AVG | report only | all year |
| 001 | Temperature, water deg. centigrade | DAILY MX | report only | all year |
| 001 | Flow rate | 30DA AVG | report only | all year |
| 001 | Flow rate | DAILY MX | report only | all year |
| 001 | Oxygen, dissolved [DO] | DAILY MN | report only | all year |
| 001 | Oxygen, dissolved percent saturation | DAILY MN | >= 75 % | all year |
| 001 | BOD, 5-day, 20 deg. C | 30DA AVG | <= 10 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | MX 7D AV | <= 15 mg/L | all year |
| 001 | BOD, 5-day, 20 deg. C | 30DA AVG | <= 259 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | MX 7D AV | <= 388 lb/d | all year |
| 001 | BOD, 5-day, 20 deg. C | 30DA AVG | report only | all year |
| 001 | pH | INST MIN | >= 6 SU | all year |
| 001 | pH | INST MAX | <= 9 SU | all year |
| 001 | Solids, total suspended | 30DA AVG | <= 10 mg/L | all year |
| 001 | Solids, total suspended | MX 7D AV | <= 15 mg/L | all year |
| 001 | Solids, total suspended | 30DA AVG | <= 259 lb/d | all year |
| 001 | Solids, total suspended | MX 7D AV | <= 388 lb/d | all year |
| 001 | Solids, total suspended | 30DA AVG | report only | all year |
| 001 | Oil and grease, hexane extr method | DAILY MX | <= 10 mg/L | all year |
| 001 | Nitrogen, total [as N] | 30DA AVG | report only | all year |
| 001 | Nitrogen, total [as N] | MX 7D AV | report only | all year |
| 001 | Nitrogen, total [as N] | 30DA AVG | <= 397 lb/d | all year |
| 001 | Nitrogen, ammonia total [as N] | 30DA AVG | report only | all year |
| 001 | Nitrogen, ammonia total [as N] | DAILY MX | report only | all year |
| 001 | Nitrogen, Kjeldahl, total [as N] | 30DA AVG | report only | all year |
| 001 | Nitrogen, Kjeldahl, total [as N] | MX 7D AV | report only | all year |
| 001 | Nitrite + Nitrate total [as N] | 30DA AVG | report only | all year |
| 001 | Nitrite + Nitrate total [as N] | MX 7D AV | report only | all year |
| 001 | Phosphorus, total [as P] | 30DA AVG | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | 30DA AVG | report only | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | 30DA AVG | <= 25.8 lb/d | Jan, Feb, Mar, Apr, May, Jun, Oct, Nov, Dec |
| 001 | Phosphorus, total [as P] | 30DA AVG | <= 9.9 lb/d | Jul, Aug, Sep |
| 001 | Phosphorus, total [as P] | DAILY MX | report only | Jul, Aug, Sep |
| 001 | Copper, total recoverable | SINGSAMP | report only | all year |
| 001 | E. coli, MTEC-MF | 30DA GEO | <= 126 CFU/100mL | Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | E. coli, MTEC-MF | 30DA GEO | <= 630 CFU/100mL | Jan, Feb, Mar, Nov, Dec |
| 001 | E. coli, MTEC-MF | DAILY MX | <= 252 CFU/100mL | Apr, May, Jun, Jul, Aug, Sep, Oct |
| 001 | E. coli, MTEC-MF | DAILY MX | <= 1260 CFU/100mL | Jan, Feb, Mar, Nov, Dec |
| 001 | Chlorine, total residual | MAXIMUM | report only | all year |
| 001 | BOD, 5-day, percent removal | MO AV MN | >= 85 % | all year |
| 001 | Solids, suspended percent removal | MO AV MN | >= 85 % | all year |
| 001 | Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia | DAILY MX | <= 0 pass=0;fail=1 | Jun, Dec |
| 001 | Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | DAILY MX | <= 0 pass=0;fail=1 | Jun, 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