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Local Trucking, Without Storage, Tyngsborough, Massachusetts. NPDES permit MA0030066 expired Oct 31, 2016; its limits still apply. Last 12 months: over a limit 7 times (last December 2025), 72 required values missing, 12 of 60 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Outfall | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|---|
| October 2025 | 003 | pH, minimum | 6.47 SU | ≥ 6.5 SU | — |
| October 2025 | 004 | Oil & Grease, daily maximum | 22 mg/L | ≤ 15 mg/L | 47% |
| October 2025 | 004 | pH, minimum | 6.44 SU | ≥ 6.5 SU | — |
| December 2025 | 003 | Oil & Grease, daily maximum | 50 mg/L | ≤ 15 mg/L | 233% |
| December 2025 | 003 | Solids, total suspended, daily maximum | 350 mg/L | ≤ 60 mg/L | 483% |
| December 2025 | 007 | Oil & Grease, daily maximum | 38 mg/L | ≤ 15 mg/L | 153% |
| December 2025 | 007 | Solids, total suspended, daily maximum | 410 mg/L | ≤ 60 mg/L | 583% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.3 SU | all year | 001 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 001 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 001 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 2000 gal/min | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 003 |
| pH | maximum | ≤ 8.3 SU | all year | 003 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 003 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 003 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 1000 gal/min | all year | 003 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 8.3 SU | all year | 004 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 004 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 004 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 600 gal/min | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 8.3 SU | all year | 007 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 007 |
| Solids, total suspended | daily maximum | ≤ 60 mg/L | all year | 007 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 007 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 007 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | all year | 007 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/min) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 1000 gal/min | all year | 007 |
Cited limits by parameter: Massachusetts's rules and the federal ones.
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