DES PERES, AZ · Yuma County

CS MOHAWK UTILITY COMPANY Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Arizona’s official records. Always confirm current status with Arizona before making decisions based on this information.

System facts

System ID (PWSID): AZ0414030
System type: Community Water System
Population served: 243
Service connections: 135
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
December 22, 2024 – January 21, 2025
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2024 – July 31, 2024
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2024 – November 29, 2024
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2021 – March 31, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 13, 2021 – September 25, 2021
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2021 – March 31, 2021
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
December 1, 2020 – February 28, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
November 21, 2020 – September 25, 2021
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2020 – November 30, 2020
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
June 27, 2020 – November 23, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 24, 2020 – November 23, 2021
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 9, 2020 – September 25, 2021
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2019 – November 30, 2019
Resolved
Monitoring and Reporting (DBP)
—
TTHM
September 1, 2019 – November 30, 2019
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2019 – August 31, 2019
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2019 – May 31, 2019
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2018 – May 31, 2018
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2018 – February 28, 2018
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2017 – August 31, 2017
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
July 1, 2017 – July 31, 2017
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
March 1, 2017 – March 31, 2017
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2015 – June 30, 2015
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2015 – May 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2015 – June 30, 2015
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
January 1, 2015 – January 31, 2015
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
November 1, 2014 – November 30, 2014
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2014 – February 28, 2014
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2013 – August 31, 2013
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2012 – October 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2012 – July 31, 2012
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2012 – September 30, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2012 – June 30, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2012 – May 31, 2012
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2012 – March 31, 2012
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
December 1, 2011 – December 31, 2011
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2011 – April 30, 2011
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2011 – December 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2010 – December 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2010 – May 31, 2010
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2009 – July 31, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
February 1, 2009 – February 28, 2009
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
October 1, 2008 – October 31, 2008
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2008 – October 31, 2008
Resolved
Monitoring, Regular
—
Barium
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Mercury
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Cadmium
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Arsenic
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Selenium
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Chromium
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Fluoride
March 31, 1990 – March 30, 1991
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
2,4,5-TP
April 30, 1989 – April 29, 1992
Archived
Monitoring, Regular
—
Methoxychlor
April 30, 1989 – April 29, 1992
Archived
Monitoring, Regular
—
Ethylbenzene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Benzene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Styrene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Barium
June 25, 1981 – June 24, 1982
Archived
Monitoring, Regular
—
Selenium
June 25, 1981 – June 24, 1982
Archived
Monitoring, Regular
—
Chromium
June 25, 1981 – June 24, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1980 – June 30, 1984
Archived
Monitoring, Regular
—
Arsenic
June 24, 1980 – June 23, 1981
Archived
Monitoring, Regular
—
Nitrate
June 24, 1980 – June 23, 1981
Archived
Monitoring, Regular
—
Chromium
June 24, 1980 – June 23, 1981
Archived
Monitoring, Regular
—
Cadmium
June 24, 1980 – June 23, 1981
Archived
Monitoring, Regular
—
Selenium
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Barium
June 24, 1979 – June 23, 1980
Archived
Monitoring, Regular
—
Endrin
June 24, 1978 – June 23, 1981
Archived
Monitoring, Regular
—
BHC-GAMMA
June 24, 1978 – June 23, 1981
Archived
Monitoring, Regular
—
Methoxychlor
June 24, 1978 – June 23, 1981
Archived
Monitoring, Regular
—
Toxaphene
June 24, 1978 – June 23, 1981
Archived
Monitoring, Regular
—
2,4-D
June 24, 1978 – June 23, 1981
Archived
Monitoring, Regular
—
2,4,5-TP
June 24, 1978 – June 23, 1981
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
December 22, 2024 – January 21, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2024 – July 31, 2024	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2024 – November 29, 2024	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
March 1, 2021 – March 31, 2021	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 13, 2021 – September 25, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2021 – March 31, 2021	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
December 1, 2020 – February 28, 2021	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
November 21, 2020 – September 25, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
November 1, 2020 – November 30, 2020	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 27, 2020 – November 23, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 24, 2020 – November 23, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
May 9, 2020 – September 25, 2021	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
November 1, 2019 – November 30, 2019	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
September 1, 2019 – November 30, 2019	Monitoring and Reporting (DBP)	TTHM	—	Resolved
August 1, 2019 – August 31, 2019	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2019 – May 31, 2019	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 2018 – May 31, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
February 1, 2018 – February 28, 2018	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2017 – August 31, 2017	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
July 1, 2017 – July 31, 2017	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
March 1, 2017 – March 31, 2017	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 1, 2015 – June 30, 2015	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2015 – May 31, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2015 – June 30, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2015 – January 31, 2015	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
November 1, 2014 – November 30, 2014	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2014 – February 28, 2014	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2013 – August 31, 2013	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
October 1, 2012 – October 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – July 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2012 – September 30, 2012	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
June 1, 2012 – June 30, 2012	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
May 1, 2012 – May 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 2012 – March 31, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
December 1, 2011 – December 31, 2011	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
April 1, 2011 – April 30, 2011	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2011 – December 31, 2011	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2010 – December 31, 2010	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
May 1, 2010 – May 31, 2010	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2009 – July 31, 2009	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2009 – February 28, 2009	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2008 – October 31, 2008	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2008 – October 31, 2008	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 31, 1990 – March 30, 1991	Monitoring, Regular	Barium	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Mercury	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Cadmium	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Arsenic	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Selenium	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Chromium	—	Archived
March 31, 1990 – March 30, 1991	Monitoring, Regular	Fluoride	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
April 30, 1989 – April 29, 1992	Monitoring, Regular	2,4,5-TP	—	Archived
April 30, 1989 – April 29, 1992	Monitoring, Regular	Methoxychlor	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Ethylbenzene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,1,2-Trichloroethane	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Tetrachloroethylene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Benzene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Styrene	—	Archived
June 25, 1981 – June 24, 1982	Monitoring, Regular	Barium	—	Archived
June 25, 1981 – June 24, 1982	Monitoring, Regular	Selenium	—	Archived
June 25, 1981 – June 24, 1982	Monitoring, Regular	Chromium	—	Archived
July 1, 1980 – June 30, 1984	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 24, 1980 – June 23, 1981	Monitoring, Regular	Arsenic	—	Archived
June 24, 1980 – June 23, 1981	Monitoring, Regular	Nitrate	—	Archived
June 24, 1980 – June 23, 1981	Monitoring, Regular	Chromium	—	Archived
June 24, 1980 – June 23, 1981	Monitoring, Regular	Cadmium	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Selenium	—	Archived
June 24, 1979 – June 23, 1980	Monitoring, Regular	Barium	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	Endrin	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	BHC-GAMMA	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	Methoxychlor	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	Toxaphene	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	2,4-D	—	Archived
June 24, 1978 – June 23, 1981	Monitoring, Regular	2,4,5-TP	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

November 21, 2024State Violation/Reminder Notice214 linked violations
January 26, 2021State Violation/Reminder Notice28 linked violations
December 10, 2020State Public Notification requested71 linked violations
February 12, 2018State Violation/Reminder Notice54 linked violations
February 22, 1993State Compliance achieved1 linked violation
September 30, 1980State Othergeneral compliance action — not tied to a specific violation on record
March 21, 1980State Othergeneral compliance action — not tied to a specific violation on record

Contact

KRIESS, FRED

602-698-9786

DES PERES, MO 63131