NORTHSIDE WWTP
NPDES ID: TX0070831
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, 1 compliance schedule violation.
Violations
May 31, 2026
pH
0% over limit
Discharged 3.6 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
April 30, 2026
pH
0% over limit
Discharged 5.1 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
March 31, 2026
pH
0% over limit
Discharged 4.2 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
79% over limit
Discharged 17.9 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
132% over limit
Discharged 4.64 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Nitrogen, ammonia total [as N]
257% over limit
Discharged 35.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
118% over limit
Discharged 32.62443973 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
2% over limit
Discharged 10.2 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
4% over limit
Discharged 4.8 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1102% over limit
Discharged 24.04 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Oxygen, dissolved [DO]
24% over limit
Discharged 3.8 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
231% over limit
Discharged 49.53139958 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
17% over limit
Discharged 17.48 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1540% over limit
Discharged 32.8 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
78% over limit
Discharged 17.8 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
36% over limit
Discharged 34 mg/L against a permitted limit of 25 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
798% over limit
Discharged 89.8 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2025
Nitrogen, ammonia total [as N]
227% over limit
Discharged 32.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
26% over limit
Discharged 18.9 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
28% over limit
Discharged 32 mg/L against a permitted limit of 25 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1163% over limit
Discharged 25.25 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
32% over limit
Discharged 3.4 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
120% over limit
Discharged 22.01 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
100% over limit
Discharged 29.95491975 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Oxygen, dissolved [DO]
28% over limit
Discharged 3.6 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
99% over limit
Discharged 29.75515975 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
1002% over limit
Discharged 22.03 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
99% over limit
Discharged 19.85 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
217% over limit
Discharged 31.7 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Solids, total suspended
43% over limit
Discharged 21.46 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
16% over limit
Discharged 29 mg/L against a permitted limit of 25 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
October 31, 2025
Nitrogen, ammonia total [as N]
156% over limit
Discharged 25.6 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
975% over limit
Discharged 21.5 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
30% over limit
Discharged 3.5 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Solids, total suspended
24% over limit
Discharged 18.6 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
49% over limit
Discharged 22.31409981 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
67% over limit
Discharged 16.689 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Nitrogen, ammonia total [as N]
201% over limit
Discharged 30.1 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
48% over limit
Discharged 42 % against a permitted limit of 80 % (7 DA MIN)
DMR, Limited - Numeric Violation
Whole Effluent Toxicity [WET] - C. dubia
48% over limit
Discharged 42 % against a permitted limit of 80 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
64% over limit
Discharged 24.50237979 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
4% over limit
Discharged 15.62 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
44% over limit
Discharged 2.8 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
52% over limit
Discharged 15.19 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
862% over limit
Discharged 19.23 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
40% over limit
Discharged 21.00657982 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
76% over limit
Discharged 44 mg/L against a permitted limit of 25 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
923% over limit
Discharged 20.46 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
83% over limit
Discharged 18.25 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
25% over limit
Discharged 3.75 mg/L against a permitted limit of 5 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
80% over limit
Discharged 18 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
Nitrogen, ammonia total [as N]
47% over limit
Discharged 22.05985981 kg/d against a permitted limit of 14.982 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
25% over limit
Discharged 12.47 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
14% over limit
Discharged 17.08 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
111% over limit
Discharged 21.1 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
649% over limit
Discharged 14.98 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
June 30, 2025
Nitrogen, ammonia total [as N]
18% over limit
Discharged 11.8 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
42% over limit
Discharged 2.84 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
May 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
April 30, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
February 28, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
December 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
November 30, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
August 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
July 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 7.99920012 MGD against a permitted limit of 7.9992 MGD (2HR PEAK)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)