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Noncommercial Research Organizations, Holden, Massachusetts. NPDES permit MA0028801 expired Jul 31, 2018; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 001 |
| Color | daily maximum | report only (lb/d) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 7.3 ug/L | all year | 001 |
| Chlorine, total residual | daily maximum | ≤ 41.1 ug/L | all year | 001 |
| Rhodamine WT dye | monthly average | report only (ug/L) | all year | 001 |
| Rhodamine WT dye | daily maximum | ≤ 10 ug/L | all year | 001 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 002 |
| Color | daily maximum | report only (lb/d) | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.3 SU | all year | 002 |
| Copper, total recoverable | daily maximum | ≤ 7.3 ug/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 41.1 ug/L | all year | 002 |
| Rhodamine WT dye | monthly average | report only (ug/L) | all year | 002 |
| Rhodamine WT dye | daily maximum | ≤ 10 ug/L | all year | 002 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 003 |
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | all year | 003 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 8.3 SU | all year | 003 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 003 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 003 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 003 |
| Copper, total recoverable | daily maximum | ≤ 7.3 ug/L | all year | 003 |
| Chlorine, total residual | daily maximum | ≤ 41.1 ug/L | all year | 003 |
| Specific Conductance | daily maximum | ≤ 250 umho/sec | all year | 003 |
| Temperature, water deg. fahrenheit | daily maximum | report only (deg F) | all year | 004 |
| Oxygen, dissolved [DO] | minimum | ≥ 6 mg/L | all year | 004 |
| BOD, 5-day, 20 deg. C | daily maximum | report only (mg/L) | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 8.3 SU | all year | 004 |
| Solids, total suspended | daily maximum | report only (mg/L) | all year | 004 |
| Nitrogen, total [as N] | daily maximum | report only (mg/L) | all year | 004 |
| Phosphorus, total [as P] | daily maximum | report only (mg/L) | all year | 004 |
| Copper, total recoverable | daily maximum | ≤ 7.3 ug/L | all year | 004 |
| Chlorine, total residual | daily maximum | ≤ 41.1 ug/L | all year | 004 |
| Specific Conductance | daily maximum | ≤ 250 umho/sec | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 100000 gal/d | all year | SUM |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | SUM |
Cited limits by parameter: Massachusetts's rules and the federal ones.
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Your permit document is the final word. As JSON: /api/v1/permits/MA0028801 · MCP: https://passage-data.com/mcp