MENDHAM BORO
NPDES ID: NJ0021334
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: 2 effluent violations.
Violations
April 30, 2026
Solids, total dissolved
7% over limit
Discharged 546 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total dissolved
42% over limit
Discharged 723 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total dissolved
38% over limit
Discharged 703 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total dissolved
33% over limit
Discharged 678 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total dissolved
3% over limit
Discharged 522 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total dissolved
1% over limit
Discharged 512 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total dissolved
6% over limit
Discharged 541 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total dissolved
13% over limit
Discharged 576 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Solids, total dissolved
1% over limit
Discharged 516 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total dissolved
0% over limit
Discharged 511 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Solids, total dissolved
16% over limit
Discharged 592 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Solids, total dissolved
42% over limit
Discharged 721 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Solids, total dissolved
8% over limit
Discharged 552 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Solids, total dissolved
14% over limit
Discharged 582 mg/L against a permitted limit of 509 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia
91% over limit
Discharged 4 % against a permitted limit of 46 % (MINIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)