PENFIELD WATER DISTRICT TREATMENT PLANT
NPDES ID: ILG640179
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
This quarter: 18 reporting violations.
Violations
April 30, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
March 31, 2026
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
February 28, 2026
Chlorine, total residual
7100% over limit
Discharged 3.6 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
3900% over limit
Discharged 2 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
pH
0% over limit
Discharged 8.67 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
1520% over limit
Discharged 0.81 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
1520% over limit
Discharged 0.81 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.67 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
November 30, 2025
pH
0% over limit
Discharged 8.31 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.31 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.15 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Chlorine, total residual
1900% over limit
Discharged 1 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
1900% over limit
Discharged 1 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.16 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
October 31, 2025
Iron, total [as Fe]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Chlorine, total residual
4700% over limit
Discharged 2.4 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
4700% over limit
Discharged 2.4 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.56 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 8.56 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
September 30, 2025
Chlorine, total residual
560% over limit
Discharged 0.33 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Chlorine, total residual
3100% over limit
Discharged 1.6 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 8.55 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.55 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.56 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
5100% over limit
Discharged 2.6 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
5100% over limit
Discharged 2.6 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
0% over limit
Discharged 0.56 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
June 30, 2025
pH
0% over limit
Discharged 8.76 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Chlorine, total residual
1820% over limit
Discharged 0.96 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
1820% over limit
Discharged 0.96 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.14 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.76 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.14 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
May 31, 2025
Chlorine, total residual
31900% over limit
Discharged 16 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Chlorine, total residual
2500% over limit
Discharged 1.3 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Chlorine, total residual
20% over limit
Discharged 0.06 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
300% over limit
Discharged 0.2 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Chlorine, total residual
1580% over limit
Discharged 0.84 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Chlorine, total residual
940% over limit
Discharged 0.52 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2024
Chlorine, total residual
1700% over limit
Discharged 0.9 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Chlorine, total residual
2900% over limit
Discharged 1.5 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Iron, total [as Fe]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.22 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.16 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
4700% over limit
Discharged 2.4 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
4700% over limit
Discharged 2.4 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.16 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
August 31, 2024
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.62 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Chlorine, total residual
1060% over limit
Discharged 0.58 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
1060% over limit
Discharged 0.58 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 8.62 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.11 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.2 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Iron, total [as Fe]
0% over limit
Discharged 0.2 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (4 days ago)