ASPEN HILLS WWTP
NPDES ID: MN0066028
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: 5 effluent violations.
Violations
May 31, 2026
Phosphorus, total [as P]
280% over limit
Discharged 3.8 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
7% over limit
Discharged 84 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
April 30, 2026
Phosphorus, total [as P]
40% over limit
Discharged 1.4 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Phosphorus, total [as P]
180% over limit
Discharged 2.8 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, suspended percent removal
60% over limit
Discharged 76 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
30% over limit
Discharged 1.3 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Phosphorus, total [as P]
40% over limit
Discharged 1.4 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Phosphorus, total [as P]
100% over limit
Discharged 2 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Phosphorus, total [as P]
31% over limit
Discharged 0.0970508 kg/d against a permitted limit of 0.07398 kg/d (ANNL TOT)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
33% over limit
Discharged 80 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, suspended percent removal
13% over limit
Discharged 83 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
29% over limit
Discharged 0.0954342 kg/d against a permitted limit of 0.07398 kg/d (ANNL TOT)
DMR, Limited - Numeric Violation
October 31, 2024
Phosphorus, total [as P]
27% over limit
Discharged 0.093982 kg/d against a permitted limit of 0.07398 kg/d (ANNL TOT)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
10% over limit
Discharged 1.1 mg/L against a permitted limit of 1 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Solids, suspended percent removal
40% over limit
Discharged 79 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
22% over limit
Discharged 0.0902008 kg/d against a permitted limit of 0.07398 kg/d (ANNL TOT)
DMR, Limited - Numeric Violation
August 31, 2024
Phosphorus, total [as P]
19% over limit
Discharged 0.0881184 kg/d against a permitted limit of 0.07398 kg/d (ANNL TOT)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
147% over limit
Discharged 63 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)