WESTBY COOP CREAMERY
NPDES ID: WI0070645
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: 20 reporting violations.
Violations
April 30, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (DAILY MN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 60 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 39.49799967 kg/d (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
March 31, 2026
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
35% over limit
Discharged 27 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 60 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (DAILY MN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 39.49799967 kg/d (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (DAILY MN)
DMR, Limited - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Overdue
January 31, 2026
Phosphorus, total [as P]
42% over limit
Discharged 12.45 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
25% over limit
Discharged 13.05249989 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
28% over limit
Discharged 51 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
56% over limit
Discharged 31.25 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
51% over limit
Discharged 15.79919987 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
78% over limit
Discharged 71 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
7% over limit
Discharged 28.14799976 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
81% over limit
Discharged 15.8 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
88% over limit
Discharged 37.5 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Phosphorus, total [as P]
54% over limit
Discharged 13.5 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
83% over limit
Discharged 73 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
41% over limit
Discharged 14.75499988 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
65% over limit
Discharged 33 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
12% over limit
Discharged 29.50999975 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
46% over limit
Discharged 12.75 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
30% over limit
Discharged 26 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
4% over limit
Discharged 9.14 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
22% over limit
Discharged 12.76243929 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
3% over limit
Discharged 41 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
BOD, 5-day, 20 deg. C
20% over limit
Discharged 24 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
13% over limit
Discharged 9.925 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
32% over limit
Discharged 13.73349988 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
BOD, 5-day, 20 deg. C
235% over limit
Discharged 67 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
286% over limit
Discharged 101.69599915 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
366% over limit
Discharged 48.62843899 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
250% over limit
Discharged 140 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Solids, total suspended
17% over limit
Discharged 18.61399984 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
43% over limit
Discharged 12.5 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
20% over limit
Discharged 48 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
43% over limit
Discharged 37.68199968 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
61% over limit
Discharged 32.2857 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
73% over limit
Discharged 18.03029205 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
11% over limit
Discharged 11.6337499 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 22.5 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
BOD, 5-day, 20 deg. C
54% over limit
Discharged 30.8 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 16.27589986 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 11.7585999 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
115% over limit
Discharged 43 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
33% over limit
Discharged 34.95799971 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
128% over limit
Discharged 91 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
54% over limit
Discharged 16.06024987 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, 5-day, 20 deg. C
2% over limit
Discharged 26.78599977 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
83% over limit
Discharged 73 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
83% over limit
Discharged 19.12474984 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
13% over limit
Discharged 17.98974985 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
144% over limit
Discharged 48.75 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Solids, total suspended
61% over limit
Discharged 63.55999947 kg/d against a permitted limit of 39.49799967 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
24% over limit
Discharged 74.2222 mg/L against a permitted limit of 60 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
21% over limit
Discharged 31.77999973 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
88% over limit
Discharged 75 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
81% over limit
Discharged 28.80375736 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
114% over limit
Discharged 22.34687861 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
188% over limit
Discharged 57.6667 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
34% over limit
Discharged 14.02356048 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
34% over limit
Discharged 11.74 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
108% over limit
Discharged 83 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 18.26087865 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
8% over limit
Discharged 42.67599964 kg/d against a permitted limit of 39.49799967 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
105% over limit
Discharged 41 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
November 30, 2024
BOD, 5-day, 20 deg. C
6% over limit
Discharged 21.25 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
66% over limit
Discharged 14.5 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Phosphorus, total [as P]
67% over limit
Discharged 14.6 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (QRTR MAX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
77% over limit
Discharged 15.5 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Phosphorus, total [as P]
80% over limit
Discharged 15.75 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
14% over limit
Discharged 11.8607499 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Phosphorus, total [as P]
87% over limit
Discharged 16.4 mg/L against a permitted limit of 8.75 mg/L (ROLL AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
97% over limit
Discharged 51.75599957 kg/d against a permitted limit of 26.33199978 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 20.06679983 kg/d against a permitted limit of 15.88999987 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
109% over limit
Discharged 21.79199982 kg/d against a permitted limit of 10.44199991 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
71% over limit
Discharged 34.1 mg/L against a permitted limit of 20 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
93% over limit
Discharged 77 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)