ROCKFORD STP
NPDES ID: OH0022446
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
June 30, 2026
E. coli, MTEC-MF
23% over limit
Discharged 348.2 MPN/100mL against a permitted limit of 284 MPN/100mL (WK GEOMN)
DMR, Limited - Numeric Violation
May 31, 2026
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 18 mg/L against a permitted limit of 16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
20% over limit
Discharged 49 kg/d against a permitted limit of 40.9 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
42% over limit
Discharged 34 mg/L against a permitted limit of 24 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 120 kg/d against a permitted limit of 115 kg/d (WKLY MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 80 mg/L against a permitted limit of 67.5 mg/L (WKLY MAX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
47% over limit
Discharged 40 kg/d against a permitted limit of 27.3 kg/d (MO AVG)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
75% over limit
Discharged 28 mg/L against a permitted limit of 16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 47 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, carbonaceous [5 day, 20 C]
6% over limit
Discharged 17 mg/L against a permitted limit of 16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 18 mg/L against a permitted limit of 16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
September 30, 2025
BOD, carbonaceous [5 day, 20 C]
13% over limit
Discharged 18 mg/L against a permitted limit of 16 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phosphorus, total [as P]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 15, 2026 (5 hours ago)