LECLAIRE CITY OF STP
NPDES ID: IA0022012
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
Nitrogen, ammonia total [as N]
80% over limit
Discharged 7.1975 mg/L against a permitted limit of 4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
35% over limit
Discharged 11.3 mg/L against a permitted limit of 8.4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
84% over limit
Discharged 6.241111 mg/L against a permitted limit of 3.4 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
136% over limit
Discharged 16.5 mg/L against a permitted limit of 7 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.156857 kg/d (DAILY MX)
DMR, Limited - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 10 mg/L (30DA AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.01687 mg/L (30DA AVG)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.0269 mg/L (DAILY MX)
DMR, Limited - Overdue
Copper, total [as Cu]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.0983364 kg/d (30DA AVG)
DMR, Limited - Overdue
Oil & Grease
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Overdue
January 31, 2025
Oil & Grease
43% over limit
Discharged 14.3 mg/L against a permitted limit of 10 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2024
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 kg/d against a permitted limit of 145.73399878 kg/d (30DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 kg/d against a permitted limit of 233.35599804 kg/d (7 DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 40 mg/L (7 DA AVG)
DMR, Limited - Overdue
BOD, carbonaceous [5 day, 20 C]
0% over limit
Discharged 0 mg/L against a permitted limit of 25 mg/L (30DA AVG)
DMR, Limited - Overdue
E. coli
104% over limit
Discharged 273.6241 MPN/100mL against a permitted limit of 134 MPN/100mL (GEO MEAN)
DMR, Limited - Numeric Violation
August 31, 2024
Oil & Grease
36% over limit
Discharged 13.6 mg/L against a permitted limit of 10 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2024
Oxygen, dissolved [DO]
18% over limit
Discharged 2.31 mg/L against a permitted limit of 2.8 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)