CARDWELL RESERVE WASTEWATER TREATMENT FACILITY
NPDES ID: NE0137596
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
Nitrogen, ammonia total [as N]
23% over limit
Discharged 18.6 mg/L against a permitted limit of 15.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
147% over limit
Discharged 18.6 mg/L against a permitted limit of 7.52 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
17% over limit
Discharged 0.28 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 19.6 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
146% over limit
Discharged 19.6 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
228% over limit
Discharged 26.1 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
67% over limit
Discharged 0.4 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
63% over limit
Discharged 26.1 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
59% over limit
Discharged 25.4 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 27.1 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
83% over limit
Discharged 0.44 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
219% over limit
Discharged 25.4 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
12% over limit
Discharged 17.9 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
125% over limit
Discharged 17.9 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2025
BOD, carbonaceous [5 day, 20 C]
8% over limit
Discharged 27.1 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
343% over limit
Discharged 25.4 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
322% over limit
Discharged 0.38 kg/d against a permitted limit of 0.09 kg/d (MO 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
Nitrogen, ammonia total [as N]
124% over limit
Discharged 0.38 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
788% over limit
Discharged 25.4 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
111% over limit
Discharged 12.1 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
323% over limit
Discharged 12.1 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
1821% over limit
Discharged 2420 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 0.16 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
712% over limit
Discharged 2420 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
288% over limit
Discharged 11.1 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
56% over limit
Discharged 0.14 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
93% over limit
Discharged 11.1 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
6% over limit
Discharged 0.18 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
208% over limit
Discharged 8.81 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
53% over limit
Discharged 8.81 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 0.18 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
89% over limit
Discharged 0.17 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
12% over limit
Discharged 141 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
341% over limit
Discharged 12.6 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
120% over limit
Discharged 12.6 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
5117% over limit
Discharged 12 kg/d against a permitted limit of 0.23 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 11.3 mg/L against a permitted limit of 7.52 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
10% over limit
Discharged 16.6 mg/L against a permitted limit of 15.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
121% over limit
Discharged 16.6 mg/L against a permitted limit of 7.52 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
26% over limit
Discharged 0.29 kg/d against a permitted limit of 0.23 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
25% over limit
Discharged 18.9 mg/L against a permitted limit of 15.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
151% over limit
Discharged 18.9 mg/L against a permitted limit of 7.52 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, carbonaceous [5 day, 20 C]
33% over limit
Discharged 33.2 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
13% over limit
Discharged 34 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 0.32 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
51% over limit
Discharged 24.1 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 24.1 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
17% over limit
Discharged 0.28 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
184% over limit
Discharged 22.6 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
42% over limit
Discharged 22.6 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
31% over limit
Discharged 20.9 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
163% over limit
Discharged 20.9 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 0.31 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
149% over limit
Discharged 19.8 mg/L against a permitted limit of 7.96 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
24% over limit
Discharged 19.8 mg/L against a permitted limit of 15.97 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
21% over limit
Discharged 0.29 kg/d against a permitted limit of 0.24 kg/d (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
11% over limit
Discharged 0.1 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
47% over limit
Discharged 8.41 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
194% over limit
Discharged 8.41 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 7.84 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.84 SU against a permitted limit of 6.5 SU (DAILY MN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
156% over limit
Discharged 0.23 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
156% over limit
Discharged 0.23 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, total [as N]
0% over limit
Discharged 22.3 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
E. coli, MTEC-MF
228% over limit
Discharged 978 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli, MTEC-MF
228% over limit
Discharged 978 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.003804 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0.14 kg/d against a permitted limit of 1.25 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, total [as N]
0% over limit
Discharged 22.3 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 7.84 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 7.84 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
459% over limit
Discharged 16 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
459% over limit
Discharged 16 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
676% over limit
Discharged 978 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
E. coli, MTEC-MF
676% over limit
Discharged 978 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
35% over limit
Discharged 0.23 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
35% over limit
Discharged 0.23 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.12 kg/d against a permitted limit of 1.67 kg/d (7 DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.003804 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.12 kg/d against a permitted limit of 1.04 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
179% over limit
Discharged 16 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
179% over limit
Discharged 16 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 0.14 kg/d against a permitted limit of 1.87 kg/d (7 DA AVG)
DMR, Limited - Overdue
August 31, 2024
Nitrogen, ammonia total [as N]
37% over limit
Discharged 7.86 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
37% over limit
Discharged 7.86 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 0.26 kg/d against a permitted limit of 1.87 kg/d (7 DA AVG)
DMR, Limited - Overdue
E. coli, MTEC-MF
1821% over limit
Discharged 2420 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
E. coli, MTEC-MF
1821% over limit
Discharged 2420 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.011665 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.23 kg/d against a permitted limit of 1.04 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
106% over limit
Discharged 0.35 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
106% over limit
Discharged 0.35 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 0.26 kg/d against a permitted limit of 1.25 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
175% over limit
Discharged 7.86 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
175% over limit
Discharged 7.86 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
712% over limit
Discharged 2420 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
E. coli, MTEC-MF
712% over limit
Discharged 2420 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
289% over limit
Discharged 0.35 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
289% over limit
Discharged 0.35 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.23 kg/d against a permitted limit of 1.67 kg/d (7 DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.011665 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
July 31, 2024
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.18 kg/d against a permitted limit of 1.67 kg/d (7 DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.23 kg/d against a permitted limit of 1.87 kg/d (7 DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.00864 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
76% over limit
Discharged 0.3 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
76% over limit
Discharged 0.3 kg/d against a permitted limit of 0.17 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.00864 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
233% over limit
Discharged 0.3 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
233% over limit
Discharged 0.3 kg/d against a permitted limit of 0.09 kg/d (MO AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
0% over limit
Discharged 3 MPN/100mL against a permitted limit of 298 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
59% over limit
Discharged 9.14 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
59% over limit
Discharged 9.14 mg/L against a permitted limit of 5.74 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
220% over limit
Discharged 9.14 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
220% over limit
Discharged 9.14 mg/L against a permitted limit of 2.86 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 5.5 mg/L against a permitted limit of 25 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0.18 kg/d against a permitted limit of 1.04 kg/d (MO AVG)
DMR, Limited - Overdue
E. coli, MTEC-MF
0% over limit
Discharged 3 MPN/100mL against a permitted limit of 126 MPN/100mL (MO GEOMN)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 5.5 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.23 kg/d against a permitted limit of 1.25 kg/d (MO AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)