SOUTHWEST WWTP
NPDES ID: TX0062995
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: 5 effluent violations.
Violations
May 31, 2026
Nitrogen, ammonia total [as N]
67% over limit
Discharged 5 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
13% over limit
Discharged 769.07599354 kg/d against a permitted limit of 681.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
275% over limit
Discharged 150 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2026
Nitrogen, ammonia total [as N]
100% over limit
Discharged 6 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
11% over limit
Discharged 758.17999363 kg/d against a permitted limit of 681.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Nitrogen, ammonia total [as N]
75% over limit
Discharged 7 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
9% over limit
Discharged 995.16799164 kg/d against a permitted limit of 908.908 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
50% over limit
Discharged 60 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
63% over limit
Discharged 13 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
25% over limit
Discharged 5 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 12 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
25% over limit
Discharged 10 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
13% over limit
Discharged 9 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
E. coli
83% over limit
Discharged 365 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
20% over limit
Discharged 12 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 4 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 700.06799412 kg/d against a permitted limit of 681.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
E. coli
30% over limit
Discharged 260 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
May 31, 2025
E. coli
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
March 31, 2025
Nitrogen, ammonia total [as N]
25% over limit
Discharged 10 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 7 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2025
Nitrogen, ammonia total [as N]
6% over limit
Discharged 962.93399191 kg/d against a permitted limit of 908.908 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
Limit violation
Discharged 2420 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
75% over limit
Discharged 7 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
50% over limit
Discharged 12 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
Nitrogen, ammonia total [as N]
61% over limit
Discharged 1461.42598772 kg/d against a permitted limit of 908.908 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
125% over limit
Discharged 9 mg/L against a permitted limit of 4 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
205% over limit
Discharged 122 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
12% over limit
Discharged 28 mg/L against a permitted limit of 25 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
88% over limit
Discharged 15 mg/L against a permitted limit of 8 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
IC25 Low Flow Pass/Fail Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 100 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
IC25 Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 100 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
IC25 Low Flow Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 100 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
IC25 Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 100 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
August 31, 2024
Solids, total suspended
73% over limit
Discharged 69 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
73% over limit
Discharged 69 mg/L against a permitted limit of 40 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
83% over limit
Discharged 365 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
83% over limit
Discharged 365 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2024
BOD, carbonaceous [5 day, 20 C]
20% over limit
Discharged 12 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
20% over limit
Discharged 12 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
24% over limit
Discharged 841.71599293 kg/d against a permitted limit of 681.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
24% over limit
Discharged 841.71599293 kg/d against a permitted limit of 681.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
67% over limit
Discharged 5 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
67% over limit
Discharged 5 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
460% over limit
Discharged 1120 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
E. coli
460% over limit
Discharged 1120 MPN/100mL against a permitted limit of 200 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 24 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
140% over limit
Discharged 24 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)