ALLIED TUBE AND CONDUIT CORPORATION
NPDES ID: IL0063649
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.
Violations
March 31, 2026
Zinc, total [as Zn]
79% over limit
Discharged 3.3 mg/L against a permitted limit of 1.84 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Zinc, total [as Zn]
89% over limit
Discharged 3.47 mg/L against a permitted limit of 1.84 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.00967 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 0.00967 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
October 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.011 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 0.011 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
September 30, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.05667 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 0.05667 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.01956 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 0.01956 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
July 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.045111 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 0.045111 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
June 30, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.030111 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 0.030111 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
May 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.042603 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 0.042603 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
March 31, 2025
Zinc, total [as Zn]
140% over limit
Discharged 2.76 mg/L against a permitted limit of 1.15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Zinc, total [as Zn]
44% over limit
Discharged 1.66 mg/L against a permitted limit of 1.15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Zinc, total [as Zn]
14% over limit
Discharged 1.31 mg/L against a permitted limit of 1.15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Zinc, total [as Zn]
15% over limit
Discharged 1.32 mg/L against a permitted limit of 1.15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
August 1, 2026 (5 days ago)