GRAND PRARIE WWTP
NPDES ID: TX0140392
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: 6 effluent violations.
Violations
May 31, 2026
Phosphorus, total [as P]
70% over limit
Discharged 5.1 mg/L against a permitted limit of 3 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
81% over limit
Discharged 0.82173999 kg/d against a permitted limit of 0.454 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
158% over limit
Discharged 1.29 mg/L against a permitted limit of 0.5 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
April 30, 2026
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]
83% over limit
Discharged 5.49 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
56% over limit
Discharged 4.47189996 kg/d against a permitted limit of 2.86019998 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
March 31, 2026
E. coli
1100% over limit
Discharged 2400 MPN/100mL against a permitted limit of 200 MPN/100mL (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
180% over limit
Discharged 42 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
74% over limit
Discharged 4.97583996 kg/d against a permitted limit of 2.86019998 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
231% over limit
Discharged 9.94 mg/L against a permitted limit of 3 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
November 30, 2025
Phosphorus, total [as P]
7% over limit
Discharged 3.2 mg/L against a permitted limit of 3 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Phosphorus, total [as P]
66% over limit
Discharged 0.83 mg/L against a permitted limit of 0.5 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
September 30, 2024
Nitrogen, ammonia total [as N]
15% over limit
Discharged 3.45 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 (24 days ago)