LANDER WASTEWATER LAGOON
NPDES ID: WY0020389
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: 3 effluent violations.
Violations
June 30, 2026
Nitrogen, ammonia total [as N]
42% over limit
Discharged 10.7 mg/L against a permitted limit of 7.53 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2026
Nitrogen, ammonia total [as N]
78% over limit
Discharged 8.35 mg/L against a permitted limit of 4.7 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2026
pH
0% over limit
Discharged 9.12 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 9.36 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
February 28, 2026
pH
0% over limit
Discharged 9.41 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
25% over limit
Discharged 4.55 mg/L against a permitted limit of 3.63 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 9.52 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 4.89 mg/L against a permitted limit of 4.39 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
107% over limit
Discharged 9.88 mg/L against a permitted limit of 4.78 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
14% over limit
Discharged 12.3 mg/L against a permitted limit of 10.79 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
46% over limit
Discharged 10.42 mg/L against a permitted limit of 7.13 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
98% over limit
Discharged 10.4 mg/L against a permitted limit of 5.24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
261% over limit
Discharged 9.9 mg/L against a permitted limit of 2.74 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
3% over limit
Discharged 10.2 mg/L against a permitted limit of 9.93 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
252% over limit
Discharged 9.325 mg/L against a permitted limit of 2.65 mg/L (MO AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
308% over limit
Discharged 8.28 mg/L against a permitted limit of 2.03 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
37% over limit
Discharged 9.6 mg/L against a permitted limit of 7.01 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
pH
0% over limit
Discharged 9.76 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
10% over limit
Discharged 10.5 mg/L against a permitted limit of 9.57 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, suspended percent removal
46% over limit
Discharged 48.864 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
21% over limit
Discharged 10.2 mg/L against a permitted limit of 8.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
148% over limit
Discharged 9 mg/L against a permitted limit of 3.63 mg/L (MO AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Nitrogen, ammonia total [as N]
30% over limit
Discharged 9.24 mg/L against a permitted limit of 7.13 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
49% over limit
Discharged 4.0749 mg/L against a permitted limit of 2.74 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
32% over limit
Discharged 6.9 mg/L against a permitted limit of 5.24 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Nitrogen, ammonia total [as N]
4% over limit
Discharged 2.749 mg/L against a permitted limit of 2.65 mg/L (MO AVG)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.18 SU against a permitted limit of 9 SU (INST MAX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (12 hours ago)