GILA BEND - WWTP
NPDES ID: AZ0020231
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: 12 effluent violations, 7 reporting violations.
Violations
June 30, 2026
Cyanide, total [as CN]
25% over limit
Discharged 0.02 mg/L against a permitted limit of 0.016 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
Cyanide, total [as CN]
153% over limit
Discharged 0.02 mg/L against a permitted limit of 0.0079 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Copper, total recoverable
14% over limit
Discharged 0.016 mg/L against a permitted limit of 0.014 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
73% over limit
Discharged 78 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
138% over limit
Discharged 107 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Solids, total suspended
20% over limit
Discharged 78 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
171% over limit
Discharged 176 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
15% over limit
Discharged 195.23 kg/d against a permitted limit of 170 kg/d (WKLY AVG)
DMR, Limited - Numeric Violation
May 31, 2026
BOD, 5-day, 20 deg. C
73% over limit
Discharged 78 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, 20 deg. C
20% over limit
Discharged 78 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Numeric Violation
April 30, 2026
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 45 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 0 mg/L (WKLY 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
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 mg/L against a permitted limit of 65 mg/L (WKLY AVG)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 170 kg/d (WKLY AVG)
DMR, Limited - Overdue
Solids, total suspended
22% over limit
Discharged 55 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Overdue
BOD, 5-day, 20 deg. C
0% over limit
Discharged 0 kg/d against a permitted limit of 120 kg/d (MO AVG)
DMR, Limited - Overdue
March 31, 2026
BOD, 5-day, 20 deg. C
29% over limit
Discharged 58 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
December 31, 2025
Cyanide, total [as CN]
52% over limit
Discharged 0.012 mg/L against a permitted limit of 0.0079 mg/L (MO AVG)
DMR, Limited - Numeric Violation
August 31, 2025
Nitrogen, ammonia total [as N]
35% over limit
Discharged 1352000 mg/L against a permitted limit of 1000000 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
35% over limit
Discharged 2690000 mg/L against a permitted limit of 2000000 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
July 31, 2025
E. coli, colony forming units [CFU]
321% over limit
Discharged 2419.6 MPN/100mL against a permitted limit of 575 MPN/100mL (DAILY MX)
DMR, Limited - Numeric Violation
April 30, 2025
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
March 31, 2025
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
February 28, 2025
E. coli, colony forming units [CFU]
126% over limit
Discharged 1300 MPN/100mL against a permitted limit of 575 MPN/100mL (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
January 31, 2025
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, 2024
Bis[2-chloroethoxy]methane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Pentachlorophenol
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-Nitrosodimethylamine [NDMA]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
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
Fluorene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Fluoranthene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Hexachlorobenzene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Dimethyl phthalate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Chrysene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Di[2-ethylhexyl] phthalate [DEHP]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Di-n-octyl phthalate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Butyl benzyl phthalate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Hexachlorocyclopentadiene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzo[a]anthracene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Anthracene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Methyl chloride [Chloromethane]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Methyl bromide [Bromomethane]
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Isophorone
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phenanthrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Phenol
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzo[k]fluoranthene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Diethyl phthalate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzo[ghi]perylene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Acenaphthylene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-Nitrosodiphenylamine
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
N-Nitrosodi-N-propylamine
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzidine
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Acrylonitrile
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Dibenz[a,h]anthracene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzo[b]fluoranthene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Bis[2-chloroethyl] ether
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Acrolein
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Naphthalene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Bis[2-chloroisopropyl] ether
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Nitrobenzene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Hexachloroethane
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Benzo[a]pyrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Methylene chloride
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Indeno[1,2,3-cd]pyrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Pyrene
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
Di-n-butyl phthalate
0% over limit
Discharged 0 mg/L against a permitted limit of 0 mg/L (DAILY MX)
DMR, Monitor Only - Overdue
August 31, 2024
Solids, suspended percent removal
29% over limit
Discharged 55 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
150% over limit
Discharged 5000000 mg/L against a permitted limit of 2000000 mg/L (DAILY MX)
DMR, Limited - Numeric Violation
BOD, 5-day, percent removal
0% over limit
Discharged 0 % against a permitted limit of 65 % (MO AV MN)
DMR, Limited - Overdue
Solids, total suspended
7% over limit
Discharged 48 mg/L against a permitted limit of 45 mg/L (MO AVG)
DMR, Limited - Numeric Violation
Nitrogen, ammonia total [as N]
400% over limit
Discharged 5000000 mg/L against a permitted limit of 1000000 mg/L (MO AVG)
DMR, Limited - Numeric Violation
First flagged
April 14, 2026 (4 months ago)
Last confirmed
August 17, 2026 (3 hours ago)