CITY OF MAGNOLIA WWTP
NPDES ID: TX0072702
X — SNC: Effluent violation (non-monthly average limit)
The facility discharged more of a pollutant than its permit allows, measured over a period other than a monthly average.
Violations
February 28, 2026
Chlorine, total residual
1000% over limit
Discharged 1.1 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Numeric Violation
Chlorine, total residual
40% over limit
Discharged 0.6 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
January 31, 2026
Chlorine, total residual
1100% over limit
Discharged 1.2 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Numeric Violation
November 30, 2025
Chlorine, total residual
70% over limit
Discharged 0.3 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Numeric Violation
April 30, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
March 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
January 31, 2025
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
December 31, 2024
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
Nitrogen, ammonia total [as N]
178% over limit
Discharged 27.8 mg/L against a permitted limit of 10 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
123% over limit
Discharged 4.45 mg/L against a permitted limit of 2 mg/L (DAILY AV)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
109% over limit
Discharged 20.86947182 kg/d against a permitted limit of 9.98799992 kg/d (DAILY AV)
DMR, Limited - Numeric Violation
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
LC50 Pass/Fail Static 24Hr Acute D. Pulex
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (SINGSAMP)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
LC50 Pass/Fail Static 24Hr Acute Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (SINGSAMP)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
November 30, 2024
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
October 31, 2024
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
September 30, 2024
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
NOEC Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO AV MN)
DMR, Monitor Only - Overdue
NOEC Lethal Static Renewal 7 Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 % against a permitted limit of 0 % (7 DA MIN)
DMR, Monitor Only - Overdue
LOEC Lethal Survival Static Renewal 7 Day Chronic Pimephales promelas
0% over limit
Discharged 0 % against a permitted limit of 0 % (MO AV MN)
DMR, Monitor Only - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Pinephales promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (7 DA MIN)
DMR, Monitor Only - Overdue
August 31, 2024
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
July 31, 2024
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 1 mg/L (MO MIN)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 1.3 MGD (ANNL AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.1 mg/L (INST MAX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 5.19984008 MGD (2HR PEAK)
DMR, Limited - Overdue
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (23 days ago)