HCMUD 559 WWTP
NPDES ID: TX0138908
E — SNC: Effluent violation (monthly average limit)
The facility discharged more of a pollutant than its permit allows, based on a monthly average.
Violations
March 31, 2026
Nitrogen, ammonia total [as N]
187% over limit
Discharged 43 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
455% over limit
Discharged 11.1 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
52% over limit
Discharged 2.89197998 kg/d against a permitted limit of 1.90679998 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
February 28, 2026
Solids, total suspended
19% over limit
Discharged 17.9 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
January 31, 2026
Nitrogen, ammonia total [as N]
25% over limit
Discharged 18.8 mg/L against a permitted limit of 15 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
E. coli
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 200 MPN/100mL (SINGGRAB)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
63% over limit
Discharged 3.25 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
E. coli
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 63 MPN/100mL (DAILY AV)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)