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Switching And Terminal Services, Livingston, Montana. NPDES permit MT0000388 expired Feb 28, 2025; its limits still apply. Last 12 months: over a limit 5 times (last July 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| June 2026 | Pass/Fail Static 48Hr Acute Ceriodaphnia dubia, value | 1 pass=0;fail=1 | ≤ 0 pass=0;fail=1 | — |
| July 2026 | Copper, total recoverable, daily maximum | 19 ug/L | ≤ 6.2 ug/L | 206% |
| July 2026 | Copper, total recoverable, monthly average | 19 ug/L | ≤ 2.3 ug/L | 726% |
| July 2026 | Zinc, total recoverable, daily maximum | 67 ug/L | ≤ 57.5 ug/L | 17% |
| July 2026 | Zinc, total recoverable, monthly average | 67 ug/L | ≤ 19.8 ug/L | 238% |
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Flow rate | monthly average | report only (MGD) | all year |
| Flow rate | daily maximum | report only (MGD) | all year |
| pH | minimum | ≥ 6 SU | all year |
| pH | maximum | ≤ 9 SU | all year |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year |
| Solids, total suspended | daily maximum | ≤ 45 mg/L | all year |
| Solids, total suspended | monthly average | ≤ 9.6 lb/d | all year |
| Oil & Grease | daily maximum | ≤ 10 mg/L | all year |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year |
| Zinc, total recoverable | monthly average | ≤ 19.8 ug/L | all year |
| Zinc, total recoverable | daily maximum | ≤ 57.5 ug/L | all year |
| Cadmium, total recoverable | monthly average | ≤ .5 ug/L | all year |
| Cadmium, total recoverable | daily maximum | ≤ 1.5 ug/L | all year |
| Copper, total recoverable | monthly average | ≤ 2.3 ug/L | all year |
| Copper, total recoverable | daily maximum | ≤ 6.2 ug/L | all year |
| Benzene | monthly average | report only (ug/L) | all year |
| Benzene | daily maximum | report only (ug/L) | all year |
| Duration of discharge | value | report only (d) | all year |
| Report due [yrmoda] | value | ≤ 1 abst=0;prst=1 | all year |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | value | ≤ 0 pass=0;fail=1 | all year |
| Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas | value | ≤ 0 pass=0;fail=1 | all year |
Cited limits by parameter: Montana's rules and the federal ones.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MT0000388 · MCP: https://passage-data.com/mcp