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Paper Mills, East Walpole, Massachusetts. NPDES permit MA0044996 expired Jan 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months |
|---|---|---|---|
| Oxygen, dissolved [DO] | daily minimum | ≥ 5 mg/L | all year |
| pH | minimum | ≥ 6.5 SU | all year |
| pH | maximum | ≤ 8.3 SU | all year |
| Solids, total suspended | monthly average | report only (mg/L) | all year |
| Solids, total suspended | daily maximum | report only (mg/L) | all year |
| Nitrogen, ammonia total [as N] | monthly average | report only (ug/L) | all year |
| Nitrogen, ammonia total [as N] | daily maximum | report only (ug/L) | all year |
| Aluminum, total [as Al] | monthly average | report only (ug/L) | all year |
| Aluminum, total [as Al] | daily maximum | report only (ug/L) | all year |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year |
Cited limits by parameter: Massachusetts's rules and the federal ones.
Same industry: the 6 Paper and Allied Products permits in Massachusetts.
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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MA0044996 · MCP: https://passage-data.com/mcp