PRAIRIE FARMS DAIRY
NPDES ID: IA0003808
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: 6 effluent violations, 1 reporting violation.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
162% over limit
Discharged 4.458888 mg/L against a permitted limit of 1.7 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
102% over limit
Discharged 9.18744356 kg/d against a permitted limit of 4.53999996 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
8% over limit
Discharged 419.3333 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
3% over limit
Discharged 648 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
190% over limit
Discharged 4.34625 mg/L against a permitted limit of 1.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 147 MPN/100mL (GEO MEAN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
123% over limit
Discharged 8.92716082 kg/d against a permitted limit of 3.99519997 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
51% over limit
Discharged 5.14 mg/L against a permitted limit of 3.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 10.08437504 kg/d against a permitted limit of 8.89839993 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
36% over limit
Discharged 5.42375 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
10% over limit
Discharged 11.3515208 kg/d against a permitted limit of 10.30579991 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 70.9 deg F (30DA AVG)
DMR, Limited - Overdue
Temperature, water deg. fahrenheit
0% over limit
Discharged 0 deg F against a permitted limit of 89.6 deg F (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
24% over limit
Discharged 4.215555 mg/L against a permitted limit of 3.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
11% over limit
Discharged 696 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
10% over limit
Discharged 427.5555 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
165% over limit
Discharged 6.624444 mg/L against a permitted limit of 2.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 14.65168764 kg/d against a permitted limit of 6.44679995 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
48% over limit
Discharged 3.41175 mg/L against a permitted limit of 2.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
19% over limit
Discharged 7.23059916 kg/d against a permitted limit of 6.08359995 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
92% over limit
Discharged 7.86323453 kg/d against a permitted limit of 4.08599997 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
145% over limit
Discharged 3.925444 mg/L against a permitted limit of 1.6 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
115% over limit
Discharged 5.94914331 kg/d against a permitted limit of 2.76939998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
166% over limit
Discharged 2.927777 mg/L against a permitted limit of 1.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
112% over limit
Discharged 2.116333 mg/L against a permitted limit of 1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
78% over limit
Discharged 4.45064232 kg/d against a permitted limit of 2.49699998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
27% over limit
Discharged 4.57 mg/L against a permitted limit of 3.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 8.65319453 kg/d against a permitted limit of 8.62599993 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
106% over limit
Discharged 5.43653191 kg/d against a permitted limit of 2.63319998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
244% over limit
Discharged 3.43625 mg/L against a permitted limit of 1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
94% over limit
Discharged 6.60499624 kg/d against a permitted limit of 3.40499997 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
135% over limit
Discharged 3.048888 mg/L against a permitted limit of 1.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
May 31, 2025
BOD, 5-day, 20 deg. C
34% over limit
Discharged 29.31966 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
92% over limit
Discharged 3.265555 mg/L against a permitted limit of 1.7 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Nitrogen, ammonia total [as N]
8% over limit
Discharged 9.53 mg/L against a permitted limit of 8.8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
39% over limit
Discharged 5.56875487 kg/d against a permitted limit of 3.99519997 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
236% over limit
Discharged 5.035 mg/L against a permitted limit of 1.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
23% over limit
Discharged 26.916 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, 5-day, 20 deg. C
4% over limit
Discharged 22.66911 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 5.083333 mg/L against a permitted limit of 3.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Chloride [as Cl]
6% over limit
Discharged 664 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
21% over limit
Discharged 4.128888 mg/L against a permitted limit of 3.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride [as Cl]
10% over limit
Discharged 691 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
127% over limit
Discharged 5.68 mg/L against a permitted limit of 2.5 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
26% over limit
Discharged 8.09985479 kg/d against a permitted limit of 6.44679995 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
134% over limit
Discharged 5.392222 mg/L against a permitted limit of 2.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
E. coli
130% over limit
Discharged 347.0001 MPN/100mL against a permitted limit of 151 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 6.22026757 kg/d against a permitted limit of 6.08359995 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
7% over limit
Discharged 23.27911 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
151% over limit
Discharged 4.01375 mg/L against a permitted limit of 1.6 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
15% over limit
Discharged 4.6955222 kg/d against a permitted limit of 4.08599997 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
73% over limit
Discharged 4.78085604 kg/d against a permitted limit of 2.76939998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
191% over limit
Discharged 3.202555 mg/L against a permitted limit of 1.1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
251% over limit
Discharged 3.506666 mg/L against a permitted limit of 1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
102% over limit
Discharged 5.05556236 kg/d against a permitted limit of 2.49699998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
283% over limit
Discharged 13.8 mg/L against a permitted limit of 3.6 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 19.59441284 kg/d against a permitted limit of 9.39779992 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
BOD, 5-day, 20 deg. C
33% over limit
Discharged 28.96766 mg/L against a permitted limit of 21.8 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
142% over limit
Discharged 20.87950068 kg/d against a permitted limit of 8.62599993 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
203% over limit
Discharged 7.98911965 kg/d against a permitted limit of 2.63319998 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
524% over limit
Discharged 6.242222 mg/L against a permitted limit of 1 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
270% over limit
Discharged 12.2 mg/L against a permitted limit of 3.3 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)