OAK MANOR WWTP
NPDES ID: TX0023337
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: 3 effluent violations.
Violations
April 30, 2026
Nitrogen, ammonia total [as N]
5% over limit
Discharged 15.7 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
3% over limit
Discharged 3.1 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
6% over limit
Discharged 15.93 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Solids, total suspended
329% over limit
Discharged 64.34 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
133% over limit
Discharged 140 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
4% over limit
Discharged 10.43 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
13% over limit
Discharged 5.12565996 kg/d against a permitted limit of 4.54 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
290% over limit
Discharged 58.53 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
70% over limit
Discharged 102 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
51% over limit
Discharged 6.86447994 kg/d against a permitted limit of 4.54 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
27% over limit
Discharged 3.8 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
152% over limit
Discharged 37.8 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Solids, total suspended
130% over limit
Discharged 34.52 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Solids, total suspended
36% over limit
Discharged 81.8 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Solids, total suspended
301% over limit
Discharged 60.15 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
7% over limit
Discharged 4.85325996 kg/d against a permitted limit of 4.54 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Solids, total suspended
62% over limit
Discharged 24.24 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Solids, total suspended
37% over limit
Discharged 20.57 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
August 31, 2025
Solids, total suspended
1% over limit
Discharged 15.2 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2025
Solids, total suspended
42% over limit
Discharged 21.29 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
15% over limit
Discharged 69.1 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
November 30, 2024
Nitrogen, ammonia total [as N]
47% over limit
Discharged 22 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
160% over limit
Discharged 7.8 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)