INTERFOR U.S. INC. (PERRY DIVISION)
NPDES ID: GAP050307
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: 9 effluent violations.
Violations
May 31, 2026
Flow, in conduit or thru treatment plant
85% over limit
Discharged 0.024023 MGD against a permitted limit of 0.013 MGD (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
pH
0% over limit
Discharged 9.55 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
223% over limit
Discharged 25.878 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
233% over limit
Discharged 1.1 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
233% over limit
Discharged 1.1 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
233% over limit
Discharged 1.1 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
233% over limit
Discharged 1.1 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
113% over limit
Discharged 1600 mg/L against a permitted limit of 750 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
813% over limit
Discharged 73 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
Zinc, total [as Zn]
61% over limit
Discharged 0.53 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
150% over limit
Discharged 20 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
17% over limit
Discharged 0.385 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
21% over limit
Discharged 9.667 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Phosphorus, total [as P]
88% over limit
Discharged 15 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
23% over limit
Discharged 0.016 MGD against a permitted limit of 0.013 MGD (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
233% over limit
Discharged 1.1 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
97% over limit
Discharged 0.65 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Flow, in conduit or thru treatment plant
12% over limit
Discharged 0.00897 MGD against a permitted limit of 0.008 MGD (DAILY AV)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
14% over limit
Discharged 0.0148 MGD against a permitted limit of 0.013 MGD (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Zinc, total [as Zn]
55% over limit
Discharged 0.51 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
55% over limit
Discharged 0.51 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Phosphorus, total [as P]
38% over limit
Discharged 11 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Phosphorus, total [as P]
25% over limit
Discharged 10 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
47% over limit
Discharged 1100 mg/L against a permitted limit of 750 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
36% over limit
Discharged 0.45 mg/L against a permitted limit of 0.33 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
9% over limit
Discharged 8.75 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
36% over limit
Discharged 0.45 mg/L against a permitted limit of 0.33 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
47% over limit
Discharged 1100 mg/L against a permitted limit of 750 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Phosphorus, total [as P]
4% over limit
Discharged 8.3 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
4% over limit
Discharged 8.3 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)