CITY OF LEXINGTON WWTP
NPDES ID: TX0054429
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
BOD, 5-day, 20 deg. C
16% over limit
Discharged 34.75 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
40% over limit
Discharged 2.4 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, 5-day, 20 deg. C
5% over limit
Discharged 31.6 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 10.8 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, 20 deg. C
48% over limit
Discharged 44.25 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, 5-day, 20 deg. C
46% over limit
Discharged 43.75 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 91.75 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
38% over limit
Discharged 41.5 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
226% over limit
Discharged 1300 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
140% over limit
Discharged 303 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
BOD, 5-day, 20 deg. C
30% over limit
Discharged 130 mg/L against a permitted limit of 100 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.2 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
59% over limit
Discharged 47.8 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Oxygen, dissolved [DO]
23% over limit
Discharged 3.1 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
September 30, 2025
Oxygen, dissolved [DO]
20% over limit
Discharged 3.2 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
16% over limit
Discharged 461 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
5% over limit
Discharged 94.5 mg/L against a permitted limit of 90 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Oxygen, dissolved [DO]
20% over limit
Discharged 3.2 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
July 31, 2025
Oxygen, dissolved [DO]
60% over limit
Discharged 1.6 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
131% over limit
Discharged 921 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.5 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
49% over limit
Discharged 188 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
8% over limit
Discharged 32.4 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2025
E. coli
22% over limit
Discharged 488 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 9.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
E. coli
9% over limit
Discharged 137 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
28% over limit
Discharged 38.25 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2025
pH
0% over limit
Discharged 9.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
49% over limit
Discharged 44.75 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
15% over limit
Discharged 145 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2025
E. coli
131% over limit
Discharged 921 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
16% over limit
Discharged 34.75 mg/L against a permitted limit of 30 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
94% over limit
Discharged 244 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2025
pH
0% over limit
Discharged 9.4 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Numeric Violation
November 30, 2024
E. coli
7% over limit
Discharged 428 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
30% over limit
Discharged 164 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2024
Oxygen, dissolved [DO]
40% over limit
Discharged 2.4 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (22 days ago)