WATERLOO WASTEWATER TREATMENT FACILITY
NPDES ID: NE0043311
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Solids, total suspended
42% over limit
Discharged 64 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
9% over limit
Discharged 46.45 kg/d against a permitted limit of 42.58 kg/d (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
24% over limit
Discharged 31 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
64% over limit
Discharged 46.45 kg/d against a permitted limit of 28.39 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
113% over limit
Discharged 64 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
2% over limit
Discharged 16.99 kg/d against a permitted limit of 16.68 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
6% over limit
Discharged 35.4 mg/L against a permitted limit of 33.39 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Solids, total suspended
38% over limit
Discharged 62 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
173% over limit
Discharged 68.3 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
107% over limit
Discharged 62 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
71% over limit
Discharged 68.3 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.42 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 22.59 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 22.59 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 10.25 kg/d against a permitted limit of 23.66 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
Limit violation
Discharged 10.25 kg/d against a permitted limit of 37.85 kg/d (7 DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
453% over limit
Discharged 166 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
246% over limit
Discharged 147.46 kg/d against a permitted limit of 42.58 kg/d (7 DA AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
2% over limit
Discharged 25.6 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
419% over limit
Discharged 147.46 kg/d against a permitted limit of 28.39 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
269% over limit
Discharged 166 mg/L against a permitted limit of 45 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli, MTEC-MF
28% over limit
Discharged 161.6 MPN/100mL against a permitted limit of 126 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)