NPDES permit MT0031631 · Minor POTW · effective, expires 2029-11-30 · EPA's file as of 2026-09-19
Check this month's numbers before you fileSign-ups are not open yet. We counted that someone asked — not who, and not which permit — and we open them once enough people do. The check stays free.
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 | Flow rate | MO AVG | report only | all year |
| 001 | Flow rate | DAILY MX | report only | all year |
| 001 | pH | MO MIN | >= 6.5 SU | all year |
| 001 | pH | MO MAX | <= 8.5 SU | all year |
| 001 | Fluoride, total [as F] | DAILY MX | <= .6 mg/L | all year |
| 001 | Chlorine, total residual | MO AVG | <= .09999 mg/L | all year |
| 001 | Chlorine, total residual | DAILY MX | <= .09999 mg/L | 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