PORT NECHES OPERATION JOINT WWTP
NPDES ID: TX0005070
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
Oxygen demand, chem. [high level] [COD]
15% over limit
Discharged 5626.05875273 kg/d against a permitted limit of 4889.58 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Oil & Grease
25% over limit
Discharged 569.72459521 kg/d against a permitted limit of 454.908 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, carbonaceous [5 day, 20 C]
2% over limit
Discharged 577.07939515 kg/d against a permitted limit of 567.95399523 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
66% over limit
Discharged 2830.78077621 kg/d against a permitted limit of 1704.76998568 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
197% over limit
Discharged 309 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Enterococci
468% over limit
Discharged 591 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
Enterococci
3030% over limit
Discharged 3255 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
121% over limit
Discharged 20908.10722432 kg/d against a permitted limit of 9448.648 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
35% over limit
Discharged 6585.36074467 kg/d against a permitted limit of 4889.58 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Enterococci
243% over limit
Discharged 120 MPN/100mL against a permitted limit of 35 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
Enterococci
6% over limit
Discharged 110 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
BOD, carbonaceous [5 day, 20 C]
14% over limit
Discharged 1951.9275836 kg/d against a permitted limit of 1704.76998568 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
0% over limit
Discharged 817.60859313 kg/d against a permitted limit of 816.29199314 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
42% over limit
Discharged 2934.42897534 kg/d against a permitted limit of 2073.41798258 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
70% over limit
Discharged 0.9 mg/L against a permitted limit of 3 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Oxygen demand, chem. [high level] [COD]
2% over limit
Discharged 9613.81311922 kg/d against a permitted limit of 9448.648 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
Enterococci
27% over limit
Discharged 132 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
Enterococci
17% over limit
Discharged 122 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Phenols
0% over limit
Discharged 0.454 kg/d against a permitted limit of 4.53999996 kg/d (DAILY AV)
DMR, Limited - Overdue
Phenols
0% over limit
Discharged 1.40739999 kg/d against a permitted limit of 9.07999992 kg/d (DAILY MX)
DMR, Limited - Overdue
February 28, 2025
Nitrogen, ammonia total [as N]
131% over limit
Discharged 18.5 mg/L against a permitted limit of 8 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Zinc, total [as Zn]
69% over limit
Discharged 0.12 mg/L against a permitted limit of 0.071 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
23% over limit
Discharged 18.5 mg/L against a permitted limit of 15 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2024
Enterococci
52% over limit
Discharged 53.3 MPN/100mL against a permitted limit of 35 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Enterococci
2227% over limit
Discharged 2420 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2024
Enterococci
7539% over limit
Discharged 7945 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
662% over limit
Discharged 266.6 MPN/100mL against a permitted limit of 35 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2024
Enterococci
561% over limit
Discharged 687 MPN/100mL against a permitted limit of 104 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Enterococci
85% over limit
Discharged 64.9 MPN/100mL against a permitted limit of 35 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
Oxygen demand, chem. [high level] [COD]
19% over limit
Discharged 5832.26555099 kg/d against a permitted limit of 4889.58 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Carbon, tot organic [TOC]
158% over limit
Discharged 142 mg/L against a permitted limit of 55 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)