CITY OF MARLIN WWTP
NPDES ID: TX0021725
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
February 28, 2026
BOD, 5-day, 20 deg. C
33% over limit
Discharged 40 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
E. coli
226% over limit
Discharged 1300 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2026
pH
0% over limit
Discharged 9.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
E. coli
896% over limit
Discharged 3973 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
53% over limit
Discharged 46 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
260% over limit
Discharged 453.08 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
325% over limit
Discharged 536 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
757% over limit
Discharged 3420 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
50% over limit
Discharged 45 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
E. coli
289% over limit
Discharged 1553 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
53% over limit
Discharged 46 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
pH
0% over limit
Discharged 9.7 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
53% over limit
Discharged 46 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
64% over limit
Discharged 148 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
pH
0% over limit
Discharged 9.6 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
30% over limit
Discharged 39 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
57% over limit
Discharged 141 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
131% over limit
Discharged 920.8 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
August 31, 2025
pH
0% over limit
Discharged 9.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 113 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli
82% over limit
Discharged 727 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
June 30, 2025
pH
0% over limit
Discharged 10.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
E. coli
334% over limit
Discharged 1732.9 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 9.9 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
E. coli
896% over limit
Discharged 3973 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli
1% over limit
Discharged 403 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
13% over limit
Discharged 34 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
BOD, 5-day, 20 deg. C
7% over limit
Discharged 32 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
3% over limit
Discharged 410.6 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
February 28, 2025
BOD, 5-day, 20 deg. C
17% over limit
Discharged 35 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
181% over limit
Discharged 1119.9 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
E. coli
5% over limit
Discharged 132 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2024
E. coli
63% over limit
Discharged 648.8 MPN/100mL against a permitted limit of 399 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
40% over limit
Discharged 42 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2024
pH
0% over limit
Discharged 10.2 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
September 30, 2024
pH
0% over limit
Discharged 10.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
Solids, total suspended
52% over limit
Discharged 137 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2024
pH
0% over limit
Discharged 10.1 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
July 31, 2024
pH
0% over limit
Discharged 10.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)