HILCO US WWTP
NPDES ID: TX0145599
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, 3 reporting violations.
Violations
June 30, 2026
BOD, 5-day, 20 deg. C
346% over limit
Discharged 1.09413999 kg/d against a permitted limit of 0.24516 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Flow, in conduit or thru treatment plant
1107% over limit
Discharged 0.07846 MGD against a permitted limit of 0.0065 MGD (DAILY AV)
DMR, Limited - Numeric Violation
Solids, total suspended
251% over limit
Discharged 1.28935999 kg/d against a permitted limit of 0.36774 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
May 31, 2026
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
994% over limit
Discharged 0.0711 MGD against a permitted limit of 0.0065 MGD (DAILY AV)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
11329% over limit
Discharged 4 mg/L against a permitted limit of 0.035 mg/L (SINGGRAB)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
27400% over limit
Discharged 2.75 mg/L against a permitted limit of 0.01 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 kg/d against a permitted limit of 0 kg/d (DAILY AV)
DMR, Monitor Only - Overdue
December 31, 2024
Solids, total suspended
0% over limit
Discharged 0.0231994 kg/d against a permitted limit of 0.36774 kg/d (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0016 MGD against a permitted limit of 0.0065 MGD (DAILY AV)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8.3 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.008 mg/L against a permitted limit of 0.035 mg/L (SINGGRAB)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1.6 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 7.6 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 2.9 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.005 mg/L against a permitted limit of 0.01 mg/L (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.0287836 kg/d against a permitted limit of 0.24516 kg/d (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0019 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 8 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Overdue
pH
0% over limit
Discharged 8 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1.3 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.5448 kg/d against a permitted limit of 0 kg/d (DAILY AV)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.81 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
November 30, 2024
Solids, total suspended
0% over limit
Discharged 4 mg/L against a permitted limit of 15 mg/L (DAILY AV)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 6 mg/L against a permitted limit of 60 mg/L (SINGGRAB)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.012712 kg/d against a permitted limit of 0.24516 kg/d (DAILY AV)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.006 mg/L against a permitted limit of 0.01 mg/L (DAILY AV)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0.95339999 kg/d against a permitted limit of 0 kg/d (DAILY AV)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.9 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1.2 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0.008 mg/L against a permitted limit of 0.035 mg/L (SINGGRAB)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 3.2 mg/L against a permitted limit of 0 mg/L (SINGSAMP)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 1.1 mg/L against a permitted limit of 0 mg/L (DAILY AV)
DMR, Monitor Only - Overdue
Oxygen, dissolved [DO]
0% over limit
Discharged 7.9 mg/L against a permitted limit of 4 mg/L (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0018 MGD against a permitted limit of 0.0065 MGD (DAILY AV)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0.0019 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
pH
0% over limit
Discharged 7.3 SU against a permitted limit of 6 SU (MINIMUM)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 1.5 mg/L against a permitted limit of 4 mg/L (MO MAX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0.0264228 kg/d against a permitted limit of 0.36774 kg/d (DAILY AV)
DMR, Limited - Overdue
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (23 minutes ago)