CITY OF TOLLESON - WWTP
NPDES ID: AZ0020338
D — SNC: Discharge monitoring report not received
The facility didn't submit its required discharge monitoring report.
This quarter: 2 single-event violations, 58 reporting violations.
Violations
April 30, 2026
pH
0% over limit
Discharged 0 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Overdue
Sulfide, total [as S]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Boron, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 97 kg/d (DAILY MX)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (DAILY MX)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
E. coli, colony forming units [CFU]
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 575 MPN/100mL (DAILY MX)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (WKLY AVG)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.036 mg/L (DAILY MX)
DMR, Limited - Overdue
Solids, suspended percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Overdue
Hydrogen sulfide
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 3000 kg/d (WKLY AVG)
DMR, Limited - Overdue
Hydrogen sulfide
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
E. coli, colony forming units [CFU]
0% over limit
Discharged 0 MPN/100mL against a permitted limit of 126 MPN/100mL (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (WKLY AVG)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.018 mg/L (MO AVG)
DMR, Limited - Overdue
Mercury, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.00002 mg/L (DAILY MX)
DMR, Limited - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 kg/d against a permitted limit of 1.00000005 kg/d (DAILY MX)
DMR, Limited - Overdue
Boron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 1.00000005 mg/L (MO AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 3000 kg/d (WKLY AVG)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 1.20000006 kg/d (MO AVG)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 2.00000009 mg/L (DAILY MX)
DMR, Limited - Overdue
pH
0% over limit
Discharged 0 SU against a permitted limit of 9 SU (MAXIMUM)
DMR, Limited - Overdue
Flow, in conduit or thru treatment plant
0% over limit
Discharged 0 MGD against a permitted limit of 0 MGD (MO AVG)
DMR, Monitor Only - Overdue
Selenium, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.1 kg/d (MO AVG)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.003 mg/L (DAILY MX)
DMR, Limited - Overdue
Mercury, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.001 kg/d (DAILY MX)
DMR, Limited - Overdue
Boron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 1.45900007 mg/L (DAILY MX)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.20000001 kg/d (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 kg/d against a permitted limit of 1.20000006 kg/d (DAILY MX)
DMR, Limited - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Copper, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 2.40000011 kg/d (DAILY MX)
DMR, Limited - Overdue
Mercury, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.000009 mg/L (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 45 mg/L (WKLY AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.009 mg/L (MO AVG)
DMR, Limited - Overdue
Hardness, total [as CaCO3]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 kg/d against a permitted limit of 0.53000003 kg/d (MO AVG)
DMR, Limited - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.008 mg/L (MO AVG)
DMR, Limited - Overdue
Selenium, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.002 mg/L (MO AVG)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 100.00000475 kg/d (DAILY MX)
DMR, Limited - Overdue
Iron, total recoverable
0% over limit
Discharged 0 mg/L against a permitted limit of 0.80000004 mg/L (MO AVG)
DMR, Limited - Overdue
Nitrogen, ammonia total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
BOD, 5-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 85 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
0% over limit
Discharged 0 kg/d against a permitted limit of 2000 kg/d (MO AVG)
DMR, Limited - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 0 deg C against a permitted limit of 0 deg C (MO AVG)
DMR, Monitor Only - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (MO AVG)
DMR, Monitor Only - Overdue
Iron, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 50.00000237 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Overdue
Sulfide, total [as S]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Temperature, water deg. centigrade
0% over limit
Discharged 0 deg C against a permitted limit of 0 deg C (DAILY MX)
DMR, Monitor Only - Overdue
Cyanide, total [as CN]
0% over limit
Discharged 0 mg/L against a permitted limit of 0.016 mg/L (DAILY MX)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Overdue
Mercury, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 0.0006 kg/d (MO AVG)
DMR, Limited - Overdue
Boron, total recoverable
0% over limit
Discharged 0 kg/d against a permitted limit of 66 kg/d (MO AVG)
DMR, Limited - Overdue
Chlorine, total residual
0% over limit
Discharged 0 kg/d against a permitted limit of 0.60000003 kg/d (MO AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 2000 kg/d (MO AVG)
DMR, Limited - Overdue
January 31, 2026
Nitrogen, ammonia total [as N]
100% over limit
Discharged 2000000 mg/L against a permitted limit of 1000000 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
300% over limit
Discharged 4 toxic against a permitted limit of 1 toxic (MO MED)
DMR, Limited - Numeric Violation
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
63% over limit
Discharged 2.6 toxic against a permitted limit of 1.6 toxic (DAILY MX)
DMR, Limited - Numeric Violation
September 30, 2025
Di[2-ethylhexyl] phthalate [DEHP]
162% over limit
Discharged 0.52400002 kg/d against a permitted limit of 0.20000001 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Di[2-ethylhexyl] phthalate [DEHP]
75% over limit
Discharged 0.52400002 kg/d against a permitted limit of 0.30000001 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Di[2-ethylhexyl] phthalate [DEHP]
600% over limit
Discharged 0.021 mg/L against a permitted limit of 0.003 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Di[2-ethylhexyl] phthalate [DEHP]
425% over limit
Discharged 0.021 mg/L against a permitted limit of 0.004 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
June 30, 2025
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MO MED)
DMR, Limited - Overdue
Static 7Day Chronic Pimephales Promelas
0% over limit
Discharged 0 toxic against a permitted limit of 0 toxic (DAILY MX)
DMR, Monitor Only - Overdue
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia
0% over limit
Discharged 0 toxic against a permitted limit of 1.6 toxic (DAILY MX)
DMR, Limited - Overdue
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
0% over limit
Discharged 0 toxic against a permitted limit of 1 toxic (MO MED)
DMR, Limited - Overdue
Pass/Fail Static 48Hr Acute Ceriodaphnia dubia
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO MED)
DMR, Monitor Only - Overdue
Static 7Day Chronic Pimephales Promelas
0% over limit
Discharged 0 toxic against a permitted limit of 0 toxic (MO MED)
DMR, Monitor Only - Overdue
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
0% over limit
Discharged 0 toxic against a permitted limit of 1.6 toxic (DAILY MX)
DMR, Limited - Overdue
Pass/Fail Static 96 Hr Acute Pimephales Promelas
0% over limit
Discharged 0 pass=0;fail=1 against a permitted limit of 0 pass=0;fail=1 (MO MED)
DMR, Monitor Only - Overdue
May 31, 2025
Solids, total suspended
3% over limit
Discharged 31 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Cyanide, total [as CN]
38% over limit
Discharged 0.011 mg/L against a permitted limit of 0.008 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2024
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
150% over limit
Discharged 4 toxic against a permitted limit of 1.6 toxic (DAILY MX)
DMR, Limited - Numeric Violation
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
300% over limit
Discharged 4 toxic against a permitted limit of 1 toxic (MO MED)
DMR, Limited - Numeric Violation
September 30, 2024
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
110% over limit
Discharged 2.1 toxic against a permitted limit of 1 toxic (MO MED)
DMR, Limited - Numeric Violation
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)
150% over limit
Discharged 4 toxic against a permitted limit of 1.6 toxic (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 16, 2026 (4 hours ago)