DRISCOLL WWTP
NPDES ID: TX0142476
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: 8 effluent violations.
Violations
May 31, 2026
Chlorine, total residual
61% over limit
Discharged 0.39 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
15% over limit
Discharged 460 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
265% over limit
Discharged 460 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2026
Oxygen, dissolved [DO]
37% over limit
Discharged 2.53 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Chlorine, total residual
70% over limit
Discharged 0.3 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
32% over limit
Discharged 26.38 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
BOD, 5-day, 20 deg. C
19% over limit
Discharged 23.7 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
98% over limit
Discharged 0.02 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
10% over limit
Discharged 4.4 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
19% over limit
Discharged 23.7 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
62% over limit
Discharged 1.53 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
February 28, 2026
Chlorine, total residual
87% over limit
Discharged 0.13 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
10% over limit
Discharged 4.4 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
501% over limit
Discharged 46.35339961 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
35% over limit
Discharged 2.62 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
January 31, 2026
BOD, 5-day, 20 deg. C
39% over limit
Discharged 27.85 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
90% over limit
Discharged 0.1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 25.2 mg/L against a permitted limit of 20 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 (SINGGRAB)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
25% over limit
Discharged 2.99 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
85% over limit
Discharged 37.06 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
100% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
20% over limit
Discharged 24.02 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
79% over limit
Discharged 0.86 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
2% over limit
Discharged 66 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Oxygen, dissolved [DO]
36% over limit
Discharged 2.56 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
16% over limit
Discharged 23.2 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
88% over limit
Discharged 0.12 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Chlorine, total residual
11% over limit
Discharged 4.42 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
October 31, 2025
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Chlorine, total residual
72% over limit
Discharged 0.28 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
55% over limit
Discharged 1.79 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
10% over limit
Discharged 4.4 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 24.08 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Chlorine, total residual
90% over limit
Discharged 0.1 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 21.43 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
40% over limit
Discharged 2.42 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
44% over limit
Discharged 28.7 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
73% over limit
Discharged 691 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Chlorine, total residual
9% over limit
Discharged 4.37 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
E. coli
448% over limit
Discharged 691 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
60% over limit
Discharged 0.4 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
37% over limit
Discharged 2.54 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
July 31, 2025
Oxygen, dissolved [DO]
41% over limit
Discharged 2.37 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
334% over limit
Discharged 1732.9 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
1275% over limit
Discharged 1732.9 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
83% over limit
Discharged 0.17 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
42% over limit
Discharged 28.42 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
2% over limit
Discharged 4.07 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
June 30, 2025
Chlorine, total residual
97% over limit
Discharged 0.03 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
31% over limit
Discharged 2.75 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
110% over limit
Discharged 8.41 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
May 31, 2025
Chlorine, total residual
92% over limit
Discharged 0.08 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
10% over limit
Discharged 4.4 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
E. coli
703% over limit
Discharged 1011.2 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
153% over limit
Discharged 1011.2 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
97% over limit
Discharged 0.03 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Chlorine, total residual
150% over limit
Discharged 10 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
December 31, 2024
Chlorine, total residual
38% over limit
Discharged 0.62 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
November 30, 2024
Solids, total suspended
0% over limit
Discharged 11.11 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 7.13 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.66 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.07 MGD against a permitted limit of 0.1 MGD (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.29 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 22.6 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
E. coli
248% over limit
Discharged 1387.5 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
E. coli
248% over limit
Discharged 1387.5 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
1001% over limit
Discharged 1387.5 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
E. coli
1001% over limit
Discharged 1387.5 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
0% over limit
Discharged 2.69 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 4.59 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 2.54239998 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.66 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 1.63439999 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 10.33 mg/L against a permitted limit of 65 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
21% over limit
Discharged 0.79 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
21% over limit
Discharged 0.79 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
October 31, 2024
E. coli
183% over limit
Discharged 356.8 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
E. coli
183% over limit
Discharged 356.8 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
0% over limit
Discharged 16.27 mg/L against a permitted limit of 65 mg/L (DAILY MX)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 1.66163999 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.86 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.07 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 3.23701997 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 9.22 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
E. coli
0% over limit
Discharged 356.8 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
40% over limit
Discharged 0.6 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
40% over limit
Discharged 0.6 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 18.3 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.03 MGD against a permitted limit of 0.1 MGD (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 7.86 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
18% over limit
Discharged 3.28 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
18% over limit
Discharged 3.28 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 23.37 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 3.22 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
September 30, 2024
pH
0% over limit
Discharged 7.74 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 36.6 mg/L against a permitted limit of 65 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 32.4 mg/L against a permitted limit of 65 mg/L (SINGGRAB)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.03 MGD against a permitted limit of 0.1 MGD (DAILY AV)
DMR, Limited - Overdue
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
64% over limit
Discharged 32.8 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
64% over limit
Discharged 32.8 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
0% over limit
Discharged 0.77179999 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
Chlorine, total residual
92% over limit
Discharged 0.08 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
92% over limit
Discharged 0.08 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 7.74 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
108% over limit
Discharged 16.02619987 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
108% over limit
Discharged 16.02619987 kg/d against a permitted limit of 7.718 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Chlorine, total residual
0% over limit
Discharged 3.46 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
6% over limit
Discharged 21.2 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
6% over limit
Discharged 21.2 mg/L against a permitted limit of 20 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.05 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
41% over limit
Discharged 2.38 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
41% over limit
Discharged 2.38 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
August 31, 2024
E. coli
200% over limit
Discharged 378.4 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
July 31, 2024
E. coli
1820% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 126 MPN/100mL (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
506% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 399 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)