CAVE CREEK, AZ · Maricopa County

TONTO HILLS DWID 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): AZ0407076
System type: Community Water System
Population served: 350
Service connections: 150
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2012 – September 30, 2012
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Chromium
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Barium
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Nitrate
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Selenium
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Fluoride
July 1, 1989 – September 30, 1989
Archived
Monitoring, Regular
—
Toluene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
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
—
Styrene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Arsenic
August 31, 1986 – August 29, 1989
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
April 8, 1981 – June 7, 1981
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1979 – June 30, 1983
Archived
Monitoring, Regular
—
Mercury
May 1, 1978 – April 30, 1980
Archived
Monitoring, Regular
—
Chromium
May 1, 1978 – April 30, 1980
Archived
Monitoring, Regular
—
Cadmium
May 1, 1978 – April 30, 1980
Archived
Monitoring, Regular
—
Arsenic
May 1, 1978 – April 30, 1980
Archived
Monitoring, Regular
—
Selenium
May 1, 1978 – April 30, 1980
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
September 1, 2012 – September 30, 2012	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 1989 – September 30, 1989	Monitoring, Regular	Cadmium	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Chromium	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Barium	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Nitrate	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Selenium	—	Archived
July 1, 1989 – September 30, 1989	Monitoring, Regular	Fluoride	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Toluene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	DICHLOROMETHANE	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	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	Styrene	—	Archived
August 31, 1986 – August 29, 1989	Monitoring, Regular	Arsenic	—	Archived
April 8, 1981 – June 7, 1981	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
July 1, 1979 – June 30, 1983	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
May 1, 1978 – April 30, 1980	Monitoring, Regular	Mercury	—	Archived
May 1, 1978 – April 30, 1980	Monitoring, Regular	Chromium	—	Archived
May 1, 1978 – April 30, 1980	Monitoring, Regular	Cadmium	—	Archived
May 1, 1978 – April 30, 1980	Monitoring, Regular	Arsenic	—	Archived
May 1, 1978 – April 30, 1980	Monitoring, Regular	Selenium	—	Archived

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

Enforcement actions

October 29, 2024State Compliance achieved69 linked violations
April 30, 1981State Consent Decree/Judgement1 linked violation
February 16, 1979State Civil Case filed in State courtgeneral compliance action — not tied to a specific violation on record

Contact

TONTO HILLS DWID

480-595-0128

CAVE CREEK, AZ 85331