75 BROADWAY, CAMBRIDGE, MA - PARCEL C3
NPDES ID: MAG912188
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
This quarter: 5 effluent violations.
Violations
June 30, 2026
Arsenic, total recoverable
93% over limit
Discharged 0.01078 mg/L against a permitted limit of 0.0056 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
23% over limit
Discharged 0.01284 mg/L against a permitted limit of 0.01043431 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
79% over limit
Discharged 0.01284 mg/L against a permitted limit of 0.00717341 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Lead, total recoverable
410% over limit
Discharged 0.00723 mg/L against a permitted limit of 0.00141861 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.53 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, total [as N]
60% over limit
Discharged 16 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.85 SU against a permitted limit of 8.3 SU (MAXIMUM)
DMR, Limited - Numeric Violation
February 28, 2026
Arsenic, total recoverable
136% over limit
Discharged 0.01324 mg/L against a permitted limit of 0.0056 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Vinyl chloride
215% over limit
Discharged 0.0063 mg/L against a permitted limit of 0.002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Sulfide, total [as S]
59% over limit
Discharged 0.17000001 mg/L against a permitted limit of 0.10683001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Lead, total recoverable
1% over limit
Discharged 0.001435 mg/L against a permitted limit of 0.00141861 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Vinyl chloride
90% over limit
Discharged 0.0038 mg/L against a permitted limit of 0.002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
7% over limit
Discharged 246.5 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (10 hours ago)