175 WYMAN STREET - WALTHAM
NPDES ID: MAG912195
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: 3 effluent violations.
Violations
May 31, 2026
Chloride, total recoverable
22% over limit
Discharged 280 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
Chloride, total recoverable
22% over limit
Discharged 280 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride, total recoverable
17% over limit
Discharged 270 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Chloride, total recoverable
23% over limit
Discharged 284 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Chloride, total recoverable
39% over limit
Discharged 320 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Chloride, total recoverable
29% over limit
Discharged 297 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride, total recoverable
36% over limit
Discharged 313 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Chloride, total recoverable
36% over limit
Discharged 313 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Cyanide, total [as CN]
398% over limit
Discharged 0.0259 mg/L against a permitted limit of 0.0052 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
18% over limit
Discharged 0.0259 mg/L against a permitted limit of 0.022 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
34% over limit
Discharged 308 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Chloride, total recoverable
22% over limit
Discharged 280 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Chloride, total recoverable
22% over limit
Discharged 280 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride, total recoverable
35% over limit
Discharged 310 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Chloride, total recoverable
26% over limit
Discharged 290 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)