PETRO STOPPING CENTER
NPDES ID: AZ0022756
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: 1 compliance schedule violation.
Violations
March 31, 2026
Mercury, total recoverable
1000% over limit
Discharged 0.00011 mg/L against a permitted limit of 0.00001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
130% over limit
Discharged 0.0000046 kg/d against a permitted limit of 0.000002 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
158% over limit
Discharged 0.0000129 kg/d against a permitted limit of 0.000005 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
1450% over limit
Discharged 0.00031 mg/L against a permitted limit of 0.00002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Zinc, total recoverable
64% over limit
Discharged 0.31000001 mg/L against a permitted limit of 0.18900001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2026
BOD, 5-day, 20 deg. C
37% over limit
Discharged 41 mg/L against a permitted limit of 30 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Mercury, total recoverable
150% over limit
Discharged 0.000005 kg/d against a permitted limit of 0.000002 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Nitrite + Nitrate total [as N]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Mercury, total recoverable
750% over limit
Discharged 0.00017 mg/L against a permitted limit of 0.00002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
280% over limit
Discharged 0.000019 kg/d against a permitted limit of 0.000005 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
400% over limit
Discharged 0.00005 mg/L against a permitted limit of 0.00001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total dissolved
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
September 30, 2025
Mercury, total recoverable
480% over limit
Discharged 0.000116 mg/L against a permitted limit of 0.00002 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
120% over limit
Discharged 0.000011 kg/d against a permitted limit of 0.000005 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Mercury, total recoverable
760% over limit
Discharged 0.000086 mg/L against a permitted limit of 0.00001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
300% over limit
Discharged 0.000008 kg/d against a permitted limit of 0.000002 kg/d (MO AVG)
DMR, Limited - Numeric Violation
June 30, 2025
Chlorine, total residual
11% over limit
Discharged 0.01 mg/L against a permitted limit of 0.009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
May 31, 2025
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
Chlorine, total residual
278% over limit
Discharged 0.034 mg/L against a permitted limit of 0.009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
71% over limit
Discharged 980.4 MPN/100mL against a permitted limit of 575 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
88% over limit
Discharged 0.01033 kg/d against a permitted limit of 0.0055 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
289% over limit
Discharged 0.07 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
29% over limit
Discharged 0.00347 kg/d against a permitted limit of 0.0027 kg/d (MO AVG)
DMR, Limited - Numeric Violation
April 30, 2025
Chlorine, total residual
97% over limit
Discharged 0.01086 kg/d against a permitted limit of 0.0055 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
289% over limit
Discharged 0.07 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
pH
0% over limit
Discharged 6.4 SU against a permitted limit of 6.5 SU (MINIMUM)
DMR, Limited - Numeric Violation
March 31, 2025
Mercury, total recoverable
100% over limit
Discharged 0.00002 mg/L against a permitted limit of 0.00001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Mercury, total recoverable
40% over limit
Discharged 0.0000028 kg/d against a permitted limit of 0.000002 kg/d (MO AVG)
DMR, Limited - Numeric Violation
Chlorine, total residual
289% over limit
Discharged 0.07 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
35% over limit
Discharged 0.00742 kg/d against a permitted limit of 0.0055 kg/d (DAILY MX)
DMR, Limited - Numeric Violation
Chlorine, total residual
156% over limit
Discharged 0.023 mg/L against a permitted limit of 0.009 mg/L (MO AVG)
DMR, Limited - Numeric Violation
February 28, 2025
Chlorine, total residual
11% over limit
Discharged 0.02 mg/L against a permitted limit of 0.018 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
January 31, 2025
E. coli, colony forming units [CFU]
1147% over limit
Discharged 1571.1 MPN/100mL against a permitted limit of 126 MPN/100mL (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
321% over limit
Discharged 2419.17 MPN/100mL against a permitted limit of 575 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
December 31, 2024
Mercury, total recoverable
100% over limit
Discharged 0.00002 mg/L against a permitted limit of 0.00001 mg/L (MO AVG)
DMR, Limited - Numeric Violation
E. coli, colony forming units [CFU]
19% over limit
Discharged 686.7 MPN/100mL against a permitted limit of 575 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (3 months ago)
Last confirmed
July 13, 2026 (24 days ago)