CHELSEA EASTERN AVE TERMINAL
NPDES ID: MA0001091
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
March 31, 2026
Benzene
370% over limit
Discharged 0.0235 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Benzo[k]fluoranthene
57% over limit
Discharged 0.0000787 mg/L against a permitted limit of 0.00005 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Benzo[b]fluoranthene
150% over limit
Discharged 0.000125 mg/L against a permitted limit of 0.00005 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
7% over limit
Discharged 0.0062 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Benzo[a]pyrene
5% over limit
Discharged 0.0000523 mg/L against a permitted limit of 0.00005 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
38% over limit
Discharged 0.008 mg/L against a permitted limit of 0.0058 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Benzene
86% over limit
Discharged 0.00929 mg/L against a permitted limit of 0.005 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
pH
0% over limit
Discharged 8.62 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
29% over limit
Discharged 2.32 mg/L against a permitted limit of 1.8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
pH
0% over limit
Discharged 8.65 SU against a permitted limit of 8.5 SU (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)