ZSCHIMMER & SCHWARZ, INC. (IVEY PLANT)
NPDES ID: GAP050360
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: 4 effluent violations.
Violations
May 31, 2026
Oil & Grease
141% over limit
Discharged 36.1 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil & Grease
240% over limit
Discharged 34 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2026
Oil & Grease
305% over limit
Discharged 60.8 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Oil & Grease
359% over limit
Discharged 45.9 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Oil & Grease
19% over limit
Discharged 11.9 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Oil & Grease
386% over limit
Discharged 48.6 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oil & Grease
224% over limit
Discharged 48.6 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
Phosphorus, total [as P]
15% over limit
Discharged 9.23 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
15% over limit
Discharged 9.23 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Phosphorus, total [as P]
95% over limit
Discharged 15.6 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
64% over limit
Discharged 13.1 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Phosphorus, total [as P]
39% over limit
Discharged 11.1 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
28% over limit
Discharged 10.2 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Phosphorus, total [as P]
7% over limit
Discharged 8.56 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Nitrogen, ammonia total [as N]
62% over limit
Discharged 48.7 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
62% over limit
Discharged 48.7 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
42% over limit
Discharged 284 mg/L against a permitted limit of 200 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
42% over limit
Discharged 284 mg/L against a permitted limit of 200 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oil & Grease
45% over limit
Discharged 14.5 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2025
Oil & Grease
463% over limit
Discharged 56.3 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
25% over limit
Discharged 250 mg/L against a permitted limit of 200 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oil & Grease
455% over limit
Discharged 83.2 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
128% over limit
Discharged 455 mg/L against a permitted limit of 200 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, 5-day, 20 deg. C
22% over limit
Discharged 244 mg/L against a permitted limit of 200 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
22% over limit
Discharged 244 mg/L against a permitted limit of 200 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
pH
0% over limit
Discharged 5.46 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
January 31, 2025
Oil & Grease
643% over limit
Discharged 74.3 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oil & Grease
1229% over limit
Discharged 199.4 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
pH
0% over limit
Discharged 5.6 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY MX)
DMR, Limited - Overdue
Phosphorus, total [as P]
148% over limit
Discharged 19.8 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
46% over limit
Discharged 11.7 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Overdue
October 31, 2024
Phosphorus, total [as P]
120% over limit
Discharged 17.6 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
7% over limit
Discharged 0.119402 kg/d against a permitted limit of 0.11123 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
185% over limit
Discharged 22.8 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
7% over limit
Discharged 0.119402 kg/d against a permitted limit of 0.11123 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 5.87 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
July 31, 2024
Oil & Grease
6% over limit
Discharged 10.55 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)