Is HIDDEN HOLLOW MHC required to publish a Consumer Confidence Report?

Yes. HIDDEN HOLLOW MHC is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is HIDDEN HOLLOW MHC’s next Consumer Confidence Report due?

HIDDEN HOLLOW MHC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

HUNTINGTON BEACH, AZ · Coconino County

HIDDEN HOLLOW MHC Water System

Consumer Confidence Report status

HIDDEN HOLLOW MHC must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for HIDDEN HOLLOW MHC.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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): AZ0403362
System type: Community Water System
Population served: 400
Service connections: 120
Ownership: public/private mix
Water source: groundwater (wells)

HIDDEN HOLLOW MHC is one of 1,189 community water systems in Arizona in the 500 or fewer people size category, serving 400 people from groundwater.

As of August 1, 2026, its federal record holds 23 entries between 1985 and 1988, all of which EPA lists as closed. Nothing has been added since 1988.

All 23 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves volatile organic chemicals, inorganic chemicals, and the Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Regular
—
Mercury
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Selenium
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Barium
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Cadmium
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Chromium
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Fluoride
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Nitrate
April 1, 1988 – June 30, 1988
Archived
Monitoring, Regular
—
Carbon tetrachloride
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
—
Toluene
January 1, 1987 – January 1, 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
—
DICHLOROMETHANE
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1987 – January 1, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 18, 1986 – July 17, 1990
Archived
Monitoring, Regular
—
Arsenic
June 13, 1985 – June 11, 1988
Archived

Archived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 1988 – June 30, 1988	Monitoring, Regular	Mercury	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Selenium	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Barium	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Cadmium	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Chromium	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Fluoride	—	Archived
April 1, 1988 – June 30, 1988	Monitoring, Regular	Nitrate	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	Carbon tetrachloride	—	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	Toluene	—	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	DICHLOROMETHANE	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 1987 – January 1, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
July 18, 1986 – July 17, 1990	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
June 13, 1985 – June 11, 1988	Monitoring, Regular	Arsenic	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

April 23, 1980State Civil Case filed in State courtgeneral compliance action — not tied to a specific violation on record

Common questions

Is HIDDEN HOLLOW MHC required to publish a Consumer Confidence Report?: Yes. HIDDEN HOLLOW MHC is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is HIDDEN HOLLOW MHC’s next Consumer Confidence Report due?: HIDDEN HOLLOW MHC’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does HIDDEN HOLLOW MHC have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for HIDDEN HOLLOW MHC.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

HIDDEN HOLLOW MHC LLC

714-960-1833

HUNTINGTON BEACH, CA 92648