650 KENDALL B LLC, CAMBRIDGE
NPDES ID: MAG912028
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
May 31, 2026
Chloride, total recoverable
481% over limit
Discharged 5000 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2074% over limit
Discharged 5000 mg/L against a permitted limit of 230 mg/L (MO AVG)
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
April 30, 2026
Chloride, total recoverable
2304% over limit
Discharged 5530 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
543% over limit
Discharged 5530 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride, total recoverable
1965% over limit
Discharged 4750 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Lead, total recoverable
320% over limit
Discharged 0.005 mg/L against a permitted limit of 0.00119 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
452% over limit
Discharged 4750 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Chloride, total recoverable
557% over limit
Discharged 5650 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2357% over limit
Discharged 5650 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Chloride, total recoverable
601% over limit
Discharged 6030 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2522% over limit
Discharged 6030 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Chloride, total recoverable
2265% over limit
Discharged 5440 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
533% over limit
Discharged 5440 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride, total recoverable
2196% over limit
Discharged 5280 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
514% over limit
Discharged 5280 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Chloride, total recoverable
2404% over limit
Discharged 5760 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
570% over limit
Discharged 5760 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Chloride, total recoverable
2291% over limit
Discharged 5500 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
540% over limit
Discharged 5500 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Chloride, total recoverable
2326% over limit
Discharged 5580 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Lead, total recoverable
740% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00119 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
549% over limit
Discharged 5580 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Chloride, total recoverable
2322% over limit
Discharged 5570 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
548% over limit
Discharged 5570 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Chloride, total recoverable
583% over limit
Discharged 5870 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2452% over limit
Discharged 5870 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
9% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00914 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
57% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00636 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chloride, total recoverable
2761% over limit
Discharged 6580 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
665% over limit
Discharged 6580 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Chloride, total recoverable
2387% over limit
Discharged 5720 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
565% over limit
Discharged 5720 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total recoverable
320% over limit
Discharged 0.005 mg/L against a permitted limit of 0.00119 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chloride, total recoverable
2461% over limit
Discharged 5890 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
585% over limit
Discharged 5890 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride, total recoverable
2309% over limit
Discharged 5540 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
544% over limit
Discharged 5540 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Chloride, total recoverable
441% over limit
Discharged 4650 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
1922% over limit
Discharged 4650 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Lead, total recoverable
68% over limit
Discharged 0.002 mg/L against a permitted limit of 0.00119 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride, total recoverable
512% over limit
Discharged 5260 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2187% over limit
Discharged 5260 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Chloride, total recoverable
521% over limit
Discharged 5340 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2222% over limit
Discharged 5340 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chloride, total recoverable
551% over limit
Discharged 5600 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2335% over limit
Discharged 5600 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
20% over limit
Discharged 0.00766 mg/L against a permitted limit of 0.00636 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Chloride, total recoverable
594% over limit
Discharged 5970 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Lead, total recoverable
740% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00119 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
2496% over limit
Discharged 5970 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
9% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00914 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total recoverable
57% over limit
Discharged 0.01 mg/L against a permitted limit of 0.00636 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Chloride, total recoverable
2161% over limit
Discharged 5200 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
505% over limit
Discharged 5200 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Chloride, total recoverable
2261% over limit
Discharged 5430 mg/L against a permitted limit of 230 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Chloride, total recoverable
531% over limit
Discharged 5430 mg/L against a permitted limit of 860 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)