HARTLEY CITY OF STP
NPDES ID: IA0036480
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: 2 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
3% over limit
Discharged 5.93529631 kg/d against a permitted limit of 5.76579995 kg/d (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
129% over limit
Discharged 4.3568 mg/L against a permitted limit of 1.9 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
92% over limit
Discharged 8.24 mg/L against a permitted limit of 4.3 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
2% over limit
Discharged 15 mg/L against a permitted limit of 14.7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Sulfate, total [as SO4]
3% over limit
Discharged 1570.5 mg/L against a permitted limit of 1523 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Sulfate, total [as SO4]
37% over limit
Discharged 2084 mg/L against a permitted limit of 1523 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)