355 CHESTNUT STREET, NEEDHAM, MA
NPDES ID: MAG912032
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: 7 effluent violations.
Violations
April 30, 2026
Copper, total recoverable
405% over limit
Discharged 0.02 mg/L against a permitted limit of 0.00396 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
360% over limit
Discharged 0.00046 MGD against a permitted limit of 0.0001 MGD (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
92% over limit
Discharged 0.01 mg/L against a permitted limit of 0.0052 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
269% over limit
Discharged 0.02 mg/L against a permitted limit of 0.00542 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total recoverable
747% over limit
Discharged 0.005 mg/L against a permitted limit of 0.00059 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved [TDS]
51% over limit
Discharged 753 mg/L against a permitted limit of 500 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (6 days ago)