KEOTA CITY OF STP
NPDES ID: IA0035998
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: 1 effluent violation.
Violations
April 30, 2026
Chloride [as Cl]
36% over limit
Discharged 530 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2026
Chloride [as Cl]
57% over limit
Discharged 610 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Chloride [as Cl]
44% over limit
Discharged 560 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Chloride [as Cl]
29% over limit
Discharged 500 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Chloride [as Cl]
0% over limit
Discharged 630 mg/L against a permitted limit of 629 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chloride [as Cl]
62% over limit
Discharged 630 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2025
Chloride [as Cl]
47% over limit
Discharged 570 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 6.9 mg/L (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 1.6 mg/L (30DA AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 15.98079987 kg/d (DAILY MX)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 3.58659997 kg/d (30DA AVG)
DMR, Limited - Overdue
Chloride [as Cl]
36% over limit
Discharged 530 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
July 31, 2025
Chloride [as Cl]
0% over limit
Discharged 390 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
March 31, 2025
Chloride [as Cl]
21% over limit
Discharged 470 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Chloride [as Cl]
0% over limit
Discharged 390 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2025
Chloride [as Cl]
13% over limit
Discharged 440 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2024
Chloride [as Cl]
21% over limit
Discharged 470 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
November 30, 2024
Chloride [as Cl]
59% over limit
Discharged 620 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
October 31, 2024
Chloride [as Cl]
44% over limit
Discharged 560 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
64% over limit
Discharged 1.8 mg/L against a permitted limit of 5 mg/L (DAILY MN)
DMR, Limited - Numeric Violation
September 30, 2024
Chloride [as Cl]
3% over limit
Discharged 400 mg/L against a permitted limit of 389 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)