HOPEWELL WATER TREATMENT PLANT
NPDES ID: IL0068047
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
Solids, total suspended
60% over limit
Discharged 24 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
80% over limit
Discharged 3.6 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2026
Iron, total [as Fe]
218% over limit
Discharged 12.7 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
80% over limit
Discharged 27 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
535% over limit
Discharged 12.7 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
January 31, 2026
Iron, total [as Fe]
38% over limit
Discharged 5.5 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
175% over limit
Discharged 5.5 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
December 31, 2025
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
327% over limit
Discharged 64 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
41% over limit
Discharged 5.65 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
183% over limit
Discharged 5.65 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
113% over limit
Discharged 64 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Iron, total [as Fe]
0% over limit
Discharged 1.85 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 0.002 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Chloride [as Cl]
0% over limit
Discharged 2880 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.9 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 15 mg/L (30DA AVG)
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
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.002 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
0% over limit
Discharged 1.85 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 1 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Chloride [as Cl]
0% over limit
Discharged 2880 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.9 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
August 31, 2025
Chloride [as Cl]
0% over limit
Discharged 2500 mg/L against a permitted limit of 0 mg/L (30DA AVG)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.002 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 0.002 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.9 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Overdue
Iron, total [as Fe]
206% over limit
Discharged 6.12 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Overdue
Iron, total [as Fe]
206% over limit
Discharged 6.12 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.05 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
153% over limit
Discharged 38 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Overdue
Solids, total suspended
153% over limit
Discharged 38 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Chloride [as Cl]
0% over limit
Discharged 2500 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Iron, total [as Fe]
53% over limit
Discharged 6.12 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Overdue
Iron, total [as Fe]
53% over limit
Discharged 6.12 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
27% over limit
Discharged 38 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
27% over limit
Discharged 38 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 7.9 SU against a permitted limit of 9 SU (MO MAX)
DMR, Limited - Overdue
July 31, 2025
Solids, total suspended
47% over limit
Discharged 22 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
June 30, 2025
pH
0% over limit
Discharged 0 SU against a permitted limit of 6 SU (MO MIN)
DMR, Limited - Numeric Violation
May 31, 2025
Iron, total [as Fe]
785% over limit
Discharged 17.7 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
133% over limit
Discharged 70 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
367% over limit
Discharged 70 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
343% over limit
Discharged 17.7 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Iron, total [as Fe]
59% over limit
Discharged 3.18 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Iron, total [as Fe]
211% over limit
Discharged 6.22 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
56% over limit
Discharged 6.22 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Iron, total [as Fe]
8% over limit
Discharged 2.16 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
September 30, 2024
Iron, total [as Fe]
1% over limit
Discharged 2.01 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 18 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
August 31, 2024
Iron, total [as Fe]
855% over limit
Discharged 19.1 mg/L against a permitted limit of 2 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
220% over limit
Discharged 48 mg/L against a permitted limit of 15 mg/L (30DA AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
60% over limit
Discharged 48 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Iron, total [as Fe]
378% over limit
Discharged 19.1 mg/L against a permitted limit of 4 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)