4L PROCESSING
NPDES ID: TX0136417
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: 6 effluent violations.
Violations
April 30, 2026
Copper, total [as Cu]
25% over limit
Discharged 0.000908 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
345% over limit
Discharged 32.35657973 kg/d against a permitted limit of 7.26399994 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
351% over limit
Discharged 16.47565986 kg/d against a permitted limit of 3.65015997 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
6% over limit
Discharged 0.001589 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
94% over limit
Discharged 0.033 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
64% over limit
Discharged 0.059 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Copper, total [as Cu]
75% over limit
Discharged 0.063 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
29% over limit
Discharged 0.022 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
33% over limit
Discharged 0.0019976 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total suspended
20% over limit
Discharged 4.37655996 kg/d against a permitted limit of 3.65015997 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
69% over limit
Discharged 0.0012258 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
73% over limit
Discharged 0.0025878 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
121% over limit
Discharged 0.0375 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
121% over limit
Discharged 0.0797 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Copper, total [as Cu]
24% over limit
Discharged 0.021 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
3% over limit
Discharged 7.45467994 kg/d against a permitted limit of 7.26399994 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
13% over limit
Discharged 0.0008172 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Copper, total [as Cu]
23% over limit
Discharged 0.0209 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
May 31, 2025
Copper, total [as Cu]
18% over limit
Discharged 0.0425 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Copper, total [as Cu]
45% over limit
Discharged 0.0246 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
18% over limit
Discharged 0.0017706 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
91% over limit
Discharged 0.0689 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Copper, total [as Cu]
296% over limit
Discharged 0.0674 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
48% over limit
Discharged 0.0022246 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
163% over limit
Discharged 0.0019068 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
118% over limit
Discharged 0.0783 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2025
Copper, total [as Cu]
25% over limit
Discharged 0.000908 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
19% over limit
Discharged 30.43 mg/L against a permitted limit of 25.5 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
53% over limit
Discharged 0.026 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2025
Copper, total [as Cu]
230% over limit
Discharged 0.0049486 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
26% over limit
Discharged 32.1 mg/L against a permitted limit of 25.5 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
344% over limit
Discharged 0.16 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
206% over limit
Discharged 0.0022246 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
326% over limit
Discharged 0.0724 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2024
Copper, total [as Cu]
109% over limit
Discharged 0.0031326 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 4.58539996 kg/d against a permitted limit of 3.65015997 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
63% over limit
Discharged 11.8539399 kg/d against a permitted limit of 7.26399994 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
8% over limit
Discharged 38.83 mg/L against a permitted limit of 36.1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
121% over limit
Discharged 0.0796 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
94% over limit
Discharged 0.0014074 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
110% over limit
Discharged 0.0357 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2024
Copper, total [as Cu]
134% over limit
Discharged 0.0842 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
347% over limit
Discharged 0.076 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
58% over limit
Discharged 0.0023608 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
194% over limit
Discharged 0.0021338 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2024
Solids, total suspended
89% over limit
Discharged 13.73349988 kg/d against a permitted limit of 7.26399994 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
371% over limit
Discharged 0.08 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
32% over limit
Discharged 4.82601996 kg/d against a permitted limit of 3.65015997 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
158% over limit
Discharged 0.093 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
115% over limit
Discharged 0.0032234 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
281% over limit
Discharged 0.0027694 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2024
Copper, total [as Cu]
135% over limit
Discharged 0.0846 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
331% over limit
Discharged 0.0031326 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
362% over limit
Discharged 0.0785 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
127% over limit
Discharged 0.003405 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2024
Copper, total [as Cu]
103% over limit
Discharged 0.0030418 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
275% over limit
Discharged 0.002724 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
149% over limit
Discharged 0.0898 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
374% over limit
Discharged 0.0805 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
Copper, total [as Cu]
371% over limit
Discharged 0.0801 mg/L against a permitted limit of 0.017 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
325% over limit
Discharged 0.0030872 kg/d against a permitted limit of 0.0007264 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
148% over limit
Discharged 0.0037228 kg/d against a permitted limit of 0.0014982 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Copper, total [as Cu]
168% over limit
Discharged 0.0963 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)