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Machine Tool Accessories, major discharger, Athol, Massachusetts. NPDES permit MA0001350 expired Jul 31, 2026; its limits still apply. Last 12 months: over a limit 6 times (last August 2026), 21 of 82 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | LC50 Static 48Hr Acute Ceriodaphnia dubia, daily minimum | 9.81 % | ≥ 50 % | 80% |
| October 2025 | pH, maximum | ≤ 8.4 SU | ≤ 8.3 SU | — |
| January 2026 | pH, maximum | ≤ 8.35 SU | ≤ 8.3 SU | — |
| February 2026 | pH, minimum | ≥ 6.1 SU | ≥ 6.5 SU | — |
| July 2026 | pH, minimum | ≥ 3.69 SU | ≥ 6.5 SU | — |
| August 2026 | Chromium, hexavalent [as Cr], daily maximum | ≤ .206 mg/L | ≤ .1 mg/L | 106% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Oct | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.3 SU | all year | 002 |
| pH | daily maximum | report only (SU) | Oct | 002 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 002 |
| Oil & Grease | monthly average | ≤ 15 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Oct | 002 |
| Cyanide, total [as CN] | monthly average | ≤ .5 mg/L | all year | 002 |
| Cyanide, total [as CN] | daily maximum | ≤ 1 mg/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | monthly average | ≤ .05 mg/L | all year | 002 |
| Cyanide, free [amenable to chlorination] | daily maximum | ≤ .1 mg/L | all year | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Oct | 002 |
| Hardness, total [as CaCO3] | daily maximum | report only (mg/L) | Oct | 002 |
| Cadmium, total [as Cd] | monthly average | ≤ .068 mg/L | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Oct | 002 |
| Cadmium, total [as Cd] | daily maximum | ≤ .178 mg/L | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Oct | 002 |
| Chromium, hexavalent [as Cr] | monthly average | ≤ .05 mg/L | all year | 002 |
| Chromium, hexavalent [as Cr] | daily maximum | ≤ .1 mg/L | all year | 002 |
| Chromium, total [as Cr] | monthly average | ≤ .5 mg/L | all year | 002 |
| Chromium, total [as Cr] | daily maximum | ≤ 1 mg/L | all year | 002 |
| Copper, total [as Cu] | monthly average | ≤ .79 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 1 mg/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Oct | 002 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Oct | 002 |
| Lead, total [as Pb] | monthly average | ≤ .119 mg/L | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Oct | 002 |
| Lead, total [as Pb] | daily maximum | ≤ .69 mg/L | all year | 002 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Oct | 002 |
| Nickel, total [as Ni] | monthly average | ≤ 2.38 mg/L | all year | 002 |
| Nickel, total [as Ni] | daily maximum | ≤ 3 mg/L | all year | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Oct | 002 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Oct | 002 |
| Silver, total [as Ag] | monthly average | ≤ .026 mg/L | all year | 002 |
| Silver, total [as Ag] | daily maximum | ≤ .082 mg/L | all year | 002 |
| Zinc, total [as Zn] | monthly average | ≤ 1.48 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ 2 mg/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Oct | 002 |
| Zinc, total recoverable | daily maximum | report only (mg/L) | Oct | 002 |
| Aluminum, total [as Al] | monthly average | ≤ 1 mg/L | all year | 002 |
| Aluminum, total [as Al] | daily maximum | ≤ 2 mg/L | all year | 002 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Oct | 002 |
| Aluminum, total [as Al] | daily maximum | report only (mg/L) | Oct | 002 |
| Trichloroethylene | daily maximum | ≤ .005 mg/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | ≤ 25000 gal/d | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 30000 gal/d | all year | 002 |
| Chlorine, total residual | monthly average | ≤ .7 mg/L | all year | 002 |
| Chlorine, total residual | daily maximum | ≤ 1 mg/L | all year | 002 |
| Organics, total toxic [TTO] | daily maximum | ≤ 2.13 mg/L | all year | 002 |
| LC50 Static 48Hr Acute Ceriodaphnia dubia | daily minimum | ≥ 50 % | Oct | 002 |
| LC50 Static 48Hr Acute Pimephales promelas | daily minimum | ≥ 50 % | Oct | 002 |
| NOEL Static Renewal 7Day Chronic Ceriodaphnia dubia | daily minimum | report only (%) | Oct | 002 |
| Noel Statre 7Day Chronic Pimephales | daily minimum | report only (%) | Oct | 002 |
| Cyanide, total [as CN] | monthly average | ≤ .65 mg/L | all year | 003 |
| Cyanide, total [as CN] | daily maximum | ≤ 1.2 mg/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 83 deg F | all year | 004 |
| pH | minimum | ≥ 6.5 SU | all year | 004 |
| pH | maximum | ≤ 8.3 SU | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 7200 gal/d | all year | 004 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 83 deg F | all year | 005 |
| pH | minimum | ≥ 6.5 SU | all year | 005 |
| pH | maximum | ≤ 8.3 SU | all year | 005 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 005 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 20000 gal/d | all year | 005 |
| Temperature, water deg. fahrenheit | daily maximum | ≤ 83 deg F | all year | 007 |
| pH | minimum | ≥ 6.5 SU | all year | 007 |
| pH | maximum | ≤ 8.3 SU | all year | 007 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 007 |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 98200 gal/d | all year | 007 |
| Perfluorooctanoic acid (PFOA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluoroheptanoic acid (PFHpA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorononanoic acid (PFNA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorodecanoic acid (PFDA) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorohexanesulfonic acid (PFHxS) | daily maximum | report only (ng/L) | all year | PFAS |
| Perfluorooctanesulfonic acid (PFOS) | daily maximum | report only (ng/L) | all year | PFAS |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | SUM |
| Flow, in conduit or thru treatment plant | daily maximum | ≤ 98200 gal/d | all year | SUM |
Cited limits by parameter: Massachusetts'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/MA0001350 · MCP: https://passage-data.com/mcp