SHANNON HILLS, CITY OF
NPDES ID: AR0050636
T — SNC: Compliance schedule reporting violation
The facility was more than 30 days late reporting progress on its compliance schedule.
This quarter: 3 effluent violations, 1 compliance schedule violation.
Violations
May 31, 2026
pH
0% over limit
Discharged 5.67 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
22% over limit
Discharged 7.34 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
40% over limit
Discharged 8.51 mg/L against a permitted limit of 6.1 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
120% over limit
Discharged 32.00699973 kg/d against a permitted limit of 14.57339988 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
187% over limit
Discharged 17.2 mg/L against a permitted limit of 6 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
118% over limit
Discharged 19.6 mg/L against a permitted limit of 9 mg/L (7 DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (5 months ago)
Last confirmed
September 15, 2026 (5 days ago)