WESTERN SUGAR COOPERATIVE
NPDES ID: MT0000281
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
Nitrogen, ammonia total [as N]
6% over limit
Discharged 37 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
28% over limit
Discharged 3196 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
9% over limit
Discharged 38 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
24% over limit
Discharged 3105 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
40% over limit
Discharged 9.9 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
236% over limit
Discharged 9.4 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
11% over limit
Discharged 0.021 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 41 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
19% over limit
Discharged 2986 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
1468% over limit
Discharged 0.298 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
30% over limit
Discharged 9.2 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
73% over limit
Discharged 0.019 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 43 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
189% over limit
Discharged 8.1 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Specific conductance
34% over limit
Discharged 3357 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
218% over limit
Discharged 8.9 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 9.9 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 40 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
753% over limit
Discharged 0.162 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
Limit violation
Discharged 2419 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
20% over limit
Discharged 3003 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Chlorine, total residual
1042% over limit
Discharged 0.217 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
21% over limit
Discharged 8.6 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 41 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
189% over limit
Discharged 8.1 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
491% over limit
Discharged 0.065 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Specific conductance
16% over limit
Discharged 2908 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
4642% over limit
Discharged 0.901 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
791% over limit
Discharged 0.098 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
182% over limit
Discharged 7.9 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
17% over limit
Discharged 41 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
21% over limit
Discharged 8.6 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Specific conductance
14% over limit
Discharged 2847 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
1327173% over limit
Discharged 146 mg/L against a permitted limit of 0.011 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
7326216% over limit
Discharged 1392 mg/L against a permitted limit of 0.019 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
1250% over limit
Discharged 5400 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
129% over limit
Discharged 6.4 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
348% over limit
Discharged 564 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 45 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 9.4 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
5% over limit
Discharged 36.8 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
33% over limit
Discharged 3320 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Specific conductance
37% over limit
Discharged 3420 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1% over limit
Discharged 35.5 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
6% over limit
Discharged 37 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
31% over limit
Discharged 3284 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
8% over limit
Discharged 37.7 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
31% over limit
Discharged 3270 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Specific conductance
22% over limit
Discharged 3040 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Specific conductance
22% over limit
Discharged 3038 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 45 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Coliform, fecal general
30% over limit
Discharged 520 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
29% over limit
Discharged 45 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
55% over limit
Discharged 11 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
248% over limit
Discharged 9.73 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Specific conductance
9% over limit
Discharged 2725 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
31% over limit
Discharged 46 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
173% over limit
Discharged 7.65 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Coliform, fecal general
33% over limit
Discharged 530 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
60% over limit
Discharged 11.3 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
33% over limit
Discharged 3327 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
31% over limit
Discharged 46 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
258% over limit
Discharged 10.02 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
58% over limit
Discharged 11.2 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
37% over limit
Discharged 3431 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
223% over limit
Discharged 9.05 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Specific conductance
31% over limit
Discharged 3273 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
44% over limit
Discharged 10.2 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
34% over limit
Discharged 47 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
174% over limit
Discharged 7.66 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 48 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
33% over limit
Discharged 3319 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
103% over limit
Discharged 813 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 9.4 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Specific conductance
22% over limit
Discharged 3046 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 7.2 mg/L against a permitted limit of 7.08 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Coliform, fecal general
5949% over limit
Discharged 24196 MPN/100mL against a permitted limit of 400 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 49 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
87% over limit
Discharged 5.23 mg/L against a permitted limit of 2.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli, MTEC-MF
1226% over limit
Discharged 1671.29 MPN/100mL against a permitted limit of 126 MPN/100mL (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
26% over limit
Discharged 44 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
37% over limit
Discharged 3421 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
Nitrogen, ammonia total [as N]
26% over limit
Discharged 44 mg/L against a permitted limit of 35 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Specific conductance
30% over limit
Discharged 3240 umho/cm against a permitted limit of 2500 umho/cm (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)