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Petroleum Products, major discharger, Chelsea, Massachusetts. NPDES permit MA0003280, in force until Nov 30, 2027. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | Benzo[a]pyrene, monthly average | .147 ug/L | ≤ .05 ug/L | 194% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Temperature, water deg. centigrade | daily maximum | report only (deg C) | Apr | 001 |
| Flow rate | daily maximum | ≤ 700 gal/min | all year | 001 |
| Flow rate | daily maximum | report only (Mgal/mo) | all year | 001 |
| Turbidity | monthly average | report only (NTU) | all year | 001 |
| Turbidity | daily maximum | report only (NTU) | all year | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| pH | daily maximum | report only (SU) | Apr | 001 |
| pH | daily maximum | report only (SU) | Apr | 001 |
| Salinity | daily maximum | report only (ppt) | Apr | 001 |
| Salinity | daily maximum | report only (ppt) | Apr | 001 |
| Solids, total | daily maximum | report only (mg/L) | Apr | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | ≤ 100 mg/L | all year | 001 |
| Solids, total suspended | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | ≤ 1.8 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Nitrogen, ammonia total [as N] | daily maximum | report only (mg/L) | Apr | 001 |
| Carbon, tot organic [TOC] | daily maximum | report only (mg/L) | Apr | 001 |
| Cyanide, total [as CN] | daily maximum | ≤ 5 ug/L | all year | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | Apr | 001 |
| Cadmium, total [as Cd] | daily maximum | report only (ug/L) | Apr | 001 |
| Copper, total [as Cu] | daily maximum | ≤ 5.8 ug/L | all year | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | Apr | 001 |
| Copper, total [as Cu] | daily maximum | report only (ug/L) | Apr | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | Apr | 001 |
| Lead, total [as Pb] | daily maximum | report only (ug/L) | Apr | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | Apr | 001 |
| Nickel, total [as Ni] | daily maximum | report only (ug/L) | Apr | 001 |
| Zinc, total [as Zn] | daily maximum | ≤ 95.1 ug/L | all year | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | Apr | 001 |
| Zinc, total [as Zn] | daily maximum | report only (ug/L) | Apr | 001 |
| Oil and grease | daily maximum | ≤ 15 mg/L | all year | 001 |
| Toluene | daily maximum | report only (ug/L) | Apr | 001 |
| Toluene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzene | daily maximum | ≤ 5 ug/L | all year | 001 |
| Benzene | daily maximum | report only (ug/L) | Apr | 001 |
| Acenaphthylene | daily maximum | report only (ug/L) | Apr | 001 |
| Acenaphthylene | daily maximum | report only (ug/L) | Apr | 001 |
| Acenaphthene | daily maximum | report only (ug/L) | Apr | 001 |
| Acenaphthene | daily maximum | report only (ug/L) | Apr | 001 |
| Anthracene | daily maximum | report only (ug/L) | Apr | 001 |
| Anthracene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[b]fluoranthene | monthly average | ≤ .05 ug/L | all year | 001 |
| Benzo[b]fluoranthene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[b]fluoranthene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[k]fluoranthene | monthly average | ≤ .05 ug/L | all year | 001 |
| Benzo[k]fluoranthene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[k]fluoranthene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[a]pyrene | monthly average | ≤ .05 ug/L | all year | 001 |
| Benzo[a]pyrene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[a]pyrene | daily maximum | report only (ug/L) | Apr | 001 |
| Chrysene | monthly average | ≤ .13 ug/L | all year | 001 |
| Chrysene | daily maximum | report only (ug/L) | all year | 001 |
| Chrysene | daily maximum | report only (ug/L) | Apr | 001 |
| Ethylbenzene | daily maximum | report only (ug/L) | Apr | 001 |
| Ethylbenzene | daily maximum | report only (ug/L) | Apr | 001 |
| Fluoranthene | daily maximum | report only (ug/L) | Apr | 001 |
| Fluoranthene | daily maximum | report only (ug/L) | Apr | 001 |
| Fluorene | daily maximum | report only (ug/L) | Apr | 001 |
| Fluorene | daily maximum | report only (ug/L) | Apr | 001 |
| Indeno[1,2,3-cd]pyrene | monthly average | ≤ .1 ug/L | all year | 001 |
| Indeno[1,2,3-cd]pyrene | daily maximum | report only (ug/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | daily maximum | report only (ug/L) | Apr | 001 |
| Phenanthrene | daily maximum | report only (ug/L) | Apr | 001 |
| Phenanthrene | daily maximum | report only (ug/L) | Apr | 001 |
| Pyrene | daily maximum | report only (ug/L) | Apr | 001 |
| Pyrene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[ghi]perylene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[ghi]perylene | daily maximum | report only (ug/L) | Apr | 001 |
| Benzo[a]anthracene | monthly average | ≤ .05 ug/L | all year | 001 |
| Benzo[a]anthracene | daily maximum | report only (ug/L) | all year | 001 |
| Benzo[a]anthracene | daily maximum | report only (ug/L) | Apr | 001 |
| Dibenz[a,h]anthracene | monthly average | ≤ .1 ug/L | all year | 001 |
| Dibenz[a,h]anthracene | daily maximum | report only (ug/L) | all year | 001 |
| Dibenz[a,h]anthracene | daily maximum | report only (ug/L) | Apr | 001 |
| Naphthalene | daily maximum | ≤ 20 ug/L | all year | 001 |
| Naphthalene | daily maximum | report only (ug/L) | Apr | 001 |
| Chlorine, total residual | daily maximum | report only (mg/L) | Apr | 001 |
| Chlorine, total residual | daily maximum | ≤ 30 ug/L | all year | 001 |
| Number of Events | daily maximum | report only (#) | all year | 001 |
| Enterococci | daily maximum | report only (CFU/100mL) | all year | 001 |
| Coliform, fecal general | daily maximum | report only (MPN/100mL) | all year | 001 |
| Phthalates, total | daily maximum | report only (ug/L) | all year | 001 |
| Chemical Oxygen Demand [COD] | daily maximum | report only (mg/L) | all year | 001 |
| Xylene [mix of m+o+p] | daily maximum | report only (ug/L) | Apr | 001 |
| Xylene [mix of m+o+p] | daily maximum | report only (ug/L) | Apr | 001 |
| LC50 Static 48Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | daily maximum | report only (%) | Apr | 001 |
| LC50 Static 48Hr Acute Menidia | daily maximum | report only (%) | Apr | 001 |
| Flow rate | daily maximum | ≤ 25 gal/min | all year | 002 |
| pH | minimum | ≥ 6.5 SU | all year | 002 |
| pH | maximum | ≤ 8.5 SU | all year | 002 |
| Benzene | daily maximum | ≤ 5 ug/L | all year | 002 |
| BTEX | daily maximum | ≤ 100 ug/L | all year | 002 |
| Flow | daily maximum | report only (Mgal/mo) | all year | 002 |
| Hydrocarbons, total petroleum | daily maximum | ≤ 5 mg/L | all year | 002 |
| 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.
Same industry: the 8 Wholesale Trade — Nondurable Goods 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/MA0003280 · MCP: https://passage-data.com/mcp