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Special Warehousing And Storage, major discharger, Braintree, Massachusetts. NPDES permit MA0031551 expired Jan 31, 2026; its limits still apply. Last 12 months: over a limit 5 times (last June 2026), 1 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | pH, minimum | 6.18 SU | ≥ 6.5 SU | — |
| December 2025 | Polychlorinated biphenyls [PCBs], monthly average | < .049 ug/L | ≤ .03 ug/L | 63% |
| December 2025 | Zinc, total [as Zn], daily maximum | 411 ug/L | ≤ 90 ug/L | 357% |
| December 2025 | Zinc, total [as Zn], monthly average | 411 ug/L | ≤ 81 ug/L | 407% |
| June 2026 | Polychlorinated biphenyls [PCBs], monthly average | < .049 ug/L | ≤ .03 ug/L | 63% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Flow rate | daily maximum | ≤ 350 gal/min | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| pH | maximum | report only (SU) | Aug | 001 |
| Salinity | daily maximum | report only (ppt) | Aug, Nov | 001 |
| Solids, total suspended | monthly average | ≤ 20 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 30 mg/L | all year | 001 |
| Oil & Grease | daily maximum | ≤ 5 mg/L | all year | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Aug | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | Aug | 001 |
| Arsenic, total [as As] | monthly average | ≤ 36 ug/L | all year | 001 |
| Arsenic, total [as As] | daily maximum | ≤ 69 ug/L | all year | 001 |
| Cadmium, total [as Cd] | monthly average | ≤ 8.8 ug/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Aug | 001 |
| Cadmium, total [as Cd] | daily maximum | ≤ 17.2 ug/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (mg/L) | Aug | 001 |
| Chromium, total [as Cr] | monthly average | ≤ 323 ug/L | all year | 001 |
| Chromium, total [as Cr] | daily maximum | ≤ 746 ug/L | all year | 001 |
| Cobalt, total [as Co] | monthly average | ≤ 124 ug/L | all year | 001 |
| Cobalt, total [as Co] | daily maximum | ≤ 192 ug/L | all year | 001 |
| Copper, total [as Cu] | monthly average | ≤ 3.1 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Aug | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 4.8 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (mg/L) | Aug | 001 |
| Lead, total [as Pb] | monthly average | ≤ 8.1 ug/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Aug | 001 |
| Lead, total [as Pb] | daily maximum | ≤ 210 ug/L | all year | 001 |
| Lead, total [as Pb] | daily maximum | report only (mg/L) | Aug | 001 |
| Nickel, total [as Ni] | monthly average | ≤ 8.2 ug/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Aug | 001 |
| Nickel, total [as Ni] | daily maximum | ≤ 74 ug/L | all year | 001 |
| Nickel, total [as Ni] | daily maximum | report only (mg/L) | Aug | 001 |
| Silver, total [as Ag] | daily maximum | ≤ 1.9 ug/L | all year | 001 |
| Vanadium, total [as V] | monthly average | ≤ 66.2 ug/L | all year | 001 |
| Vanadium, total [as V] | daily maximum | ≤ 218 ug/L | all year | 001 |
| Zinc, total [as Zn] | monthly average | ≤ 81 ug/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Aug | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (mg/L) | Aug | 001 |
| Antimony, total [as Sb] | monthly average | ≤ 206 ug/L | all year | 001 |
| Antimony, total [as Sb] | daily maximum | ≤ 249 ug/L | all year | 001 |
| Tin, total [as Sn] | monthly average | ≤ 120 ug/L | all year | 001 |
| Tin, total [as Sn] | daily maximum | ≤ 409 ug/L | all year | 001 |
| Selenium, total [as Se] | monthly average | ≤ 71 ug/L | all year | 001 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 001 |
| Titanium, total [as Ti] | monthly average | ≤ 61.8 ug/L | all year | 001 |
| Titanium, total [as Ti] | daily maximum | ≤ 94.7 ug/L | all year | 001 |
| Benzene | daily maximum | ≤ 5 ug/L | all year | 001 |
| Butyl benzyl phthalate | monthly average | ≤ 88.7 ug/L | Aug | 001 |
| Butyl benzyl phthalate | daily maximum | ≤ 188 ug/L | Aug | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | monthly average | ≤ 101 ug/L | Aug | 001 |
| Di[2-ethylhexyl] phthalate [DEHP] | daily maximum | ≤ 215 ug/L | Aug | 001 |
| Polychlorinated biphenyls [PCBs] | monthly average | ≤ .03 ug/L | all year | 001 |
| BTEX | daily maximum | ≤ 100 ug/L | all year | 001 |
| Number of Events | event total | report only (#) | all year | 001 |
| Temperature Increase Deg. C | daily maximum | report only (deg C) | Aug | 001 |
| Total Group I Polycyclic Aromatic Hydrocarbons | daily maximum | ≤ 1 ug/L | all year | 001 |
| Total Group II Polycyclic Aromatic Hydrocarbons | daily maximum | ≤ 10 ug/L | all year | 001 |
| Enterococci | daily maximum | report only (MPN/100mL) | all year | 001 |
| Mercury, total [as Hg] | monthly average | ≤ .739 ug/L | all year | 001 |
| Mercury, total [as Hg] | daily maximum | ≤ 1.8 ug/L | all year | 001 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 001 |
| n-Decane | monthly average | ≤ 437 ug/L | Aug | 001 |
| n-Decane | daily maximum | ≤ 948 ug/L | Aug | 001 |
| Carbazole | monthly average | ≤ 276 ug/L | Aug | 001 |
| Carbazole | daily maximum | ≤ 598 ug/L | Aug | 001 |
| n-Octadecane | monthly average | ≤ 302 ug/L | Aug | 001 |
| n-Octadecane | daily maximum | ≤ 589 ug/L | Aug | 001 |
| Flow, total | daily maximum | report only (Mgal/mo) | all year | 001 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily minimum | ≥ 100 % | Aug | 001 |
| LC50 Static 48Hr Acute Menidia | daily minimum | ≥ 100 % | Aug | 001 |
| 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 |
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/MA0031551 · MCP: https://passage-data.com/mcp