Is MAMMOTH TOWN OF required to publish a Consumer Confidence Report?

Yes. MAMMOTH TOWN OF 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 MAMMOTH TOWN OF’s next Consumer Confidence Report due?

MAMMOTH TOWN OF’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.

MAMMOTH, AZ · Pinal County

MAMMOTH TOWN OF Water System

Consumer Confidence Report status

MAMMOTH TOWN OF 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 1 item for MAMMOTH TOWN OF that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

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): AZ0411018
System type: Community Water System
Population served: 1,181
Service connections: 539
Ownership: local government
Water source: groundwater (wells)

MAMMOTH TOWN OF is one of 272 community water systems in Arizona in the 501 to 3,300 people size category, serving 1,181 people from groundwater.

As of August 1, 2026, its federal record holds 16 entries between 1985 and 2025, of which 1 remains open; none are health-based.

Of the 16, 13 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 inorganic chemicals, the Consumer Confidence Rule, and the Total Coliform Rules.

Violation history

Public Notification Violation for NPDWR Violation
—
Public Notice
November 16, 2025 – December 29, 2025
Resolved
Notification, Known or Potential LSL
—
LEAD AND COPPER RULE REVISIONS
July 2, 2025
Unaddressed
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
July 1, 2023 – September 30, 2023
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 2, 2021 – October 7, 2021
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2014 – September 30, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2014 – March 31, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2013 – July 31, 2013
Resolved
Consumer Confidence Report Inadequate Reporting
—
Consumer Confidence Rule
October 1, 2012 – August 21, 2013
Resolved
Monitoring, Regular
—
Cadmium
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Barium
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Selenium
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Nitrate
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Mercury
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Fluoride
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Chromium
July 1, 1988 – September 30, 1988
Archived
Monitoring, Regular
—
Arsenic
August 6, 1985 – August 4, 1988
Archived

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
November 16, 2025 – December 29, 2025	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 2, 2025	Notification, Known or Potential LSL	LEAD AND COPPER RULE REVISIONS	—	Unaddressed
July 1, 2023 – September 30, 2023	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
October 2, 2021 – October 7, 2021	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 2014 – September 30, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
March 1, 2014 – March 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2013 – July 31, 2013	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2012 – August 21, 2013	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	—	Resolved
July 1, 1988 – September 30, 1988	Monitoring, Regular	Cadmium	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Barium	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Selenium	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Nitrate	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Mercury	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Fluoride	—	Archived
July 1, 1988 – September 30, 1988	Monitoring, Regular	Chromium	—	Archived
August 6, 1985 – August 4, 1988	Monitoring, Regular	Arsenic	—	Archived

Resolved addressed and confirmed by the stateUnaddressed no corrective action on record yetArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

January 7, 2005State Compliance achieved180 linked violations
May 15, 1995State Formal Notice of Violation issued244 linked violations
December 19, 1978State Othergeneral compliance action — not tied to a specific violation on record
March 31, 1978State Othergeneral compliance action — not tied to a specific violation on record

Common questions

Is MAMMOTH TOWN OF required to publish a Consumer Confidence Report?: Yes. MAMMOTH TOWN OF 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 MAMMOTH TOWN OF’s next Consumer Confidence Report due?: MAMMOTH TOWN OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MAMMOTH TOWN OF have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show 1 item for MAMMOTH TOWN OF that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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

MORENO, HECTOR

520-487-2331

MAMMOTH, AZ 85618