MAYFAIR MASTER PLANNED COMMUNITY WWTF
NPDES ID: TX0141186
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
April 30, 2026
Nitrogen, ammonia total [as N]
120% over limit
Discharged 33 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Oxygen, dissolved [DO]
15% over limit
Discharged 3.4 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
27% over limit
Discharged 0.86259999 kg/d against a permitted limit of 0.68099999 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
277% over limit
Discharged 11.3 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
Phosphorus, total [as P]
150% over limit
Discharged 2.5 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
93% over limit
Discharged 29 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
February 28, 2026
Phosphorus, total [as P]
300% over limit
Discharged 4 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
2% over limit
Discharged 0.230632 kg/d against a permitted limit of 0.227 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
99% over limit
Discharged 29.8 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
34% over limit
Discharged 47 mg/L against a permitted limit of 35 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
7% over limit
Discharged 0.72639999 kg/d against a permitted limit of 0.68099999 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
160% over limit
Discharged 0.5902 kg/d against a permitted limit of 0.227 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
BOD, carbonaceous [5 day, 20 C]
43% over limit
Discharged 14.3 mg/L against a permitted limit of 10 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
260% over limit
Discharged 3.6 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
138% over limit
Discharged 14.3 mg/L against a permitted limit of 6 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
510% over limit
Discharged 18.3 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
December 31, 2025
Phosphorus, total [as P]
223% over limit
Discharged 3.23 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
97% over limit
Discharged 29.5 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
323% over limit
Discharged 12.7 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Nitrogen, ammonia total [as N]
70% over limit
Discharged 5.1 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
33% over limit
Discharged 20 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
239% over limit
Discharged 3.39 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
October 31, 2025
Phosphorus, total [as P]
76% over limit
Discharged 1.76 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2025
Phosphorus, total [as P]
6% over limit
Discharged 1.06 mg/L against a permitted limit of 1 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)