MANDAREE WATER TREATMENT PLANT
NPDES ID: NDDW0002I
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, 4 reporting violations.
Violations
June 30, 2026
Aluminum, total [as Al]
408% over limit
Discharged 0.44221002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2026
Aluminum, total [as Al]
1460% over limit
Discharged 1.35687006 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
161% over limit
Discharged 1.95570009 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Aluminum, total [as Al]
56% over limit
Discharged 1.17069006 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
1246% over limit
Discharged 1.17069006 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Aluminum, total [as Al]
376% over limit
Discharged 0.41403002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Overdue
January 31, 2026
Chlorine, total residual
116% over limit
Discharged 0.041 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Overdue
September 30, 2025
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Overdue
Aluminum, total [as Al]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Overdue
August 31, 2025
Aluminum, total [as Al]
72% over limit
Discharged 0.15000001 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Aluminum, total [as Al]
38% over limit
Discharged 0.12000001 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Aluminum, total [as Al]
516% over limit
Discharged 0.53600003 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
Chlorine, total residual
58% over limit
Discharged 0.03 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
347% over limit
Discharged 0.38900002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Aluminum, total [as Al]
833% over limit
Discharged 0.81200004 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
8% over limit
Discharged 0.81200004 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Aluminum, total [as Al]
276% over limit
Discharged 0.32750002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 6.35 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
746% over limit
Discharged 0.73600003 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Aluminum, total [as Al]
561% over limit
Discharged 0.57500003 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Aluminum, total [as Al]
294% over limit
Discharged 0.34300002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Aluminum, total [as Al]
104% over limit
Discharged 1.53000007 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
1659% over limit
Discharged 1.53000007 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Aluminum, total [as Al]
219% over limit
Discharged 2.39000011 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
2647% over limit
Discharged 2.39000011 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Aluminum, total [as Al]
1739% over limit
Discharged 1.60000008 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Aluminum, total [as Al]
113% over limit
Discharged 1.60000008 mg/L against a permitted limit of 0.75000004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Aluminum, total [as Al]
502% over limit
Discharged 0.52400002 mg/L against a permitted limit of 0.087 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (8 hours ago)