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MAMMOTH TOWN OF

Arizona — Community Water System — PWSID: AZ0411018

System Information

PWSIDAZ0411018
System NameMAMMOTH TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedOct 5, 1979
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityMAMMOTH
ZIP Code85618
AddressPO BOX 130
OrganizationMORENO, HECTOR
Phone520-487-2331

Population & Service

Population Served1,181
Service Connections539

Drinking Water Violations (134)

This water system has 134 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2024 Sep 30, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 Sep 30, 2024 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2024 Jun 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2024 Jun 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Apr 9, 2024 Consumer Confidence Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Apr 9, 2024 Consumer Confidence Rule
Jul 1, 2023 Sep 30, 2023 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2023 Sep 30, 2023 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 2, 2021 — Consumer Confidence Rule Other No No — — — Resolved Oct 7, 2021 Consumer Confidence Rule
Oct 2, 2021 — Consumer Confidence Rule Other No No — — — Resolved Oct 7, 2021 Consumer Confidence Rule
Apr 1, 2017 — Revised Total Coliform Rule RPT No No — — — Resolved May 15, 2017 Revised Total Coliform Rule
Apr 1, 2017 — Revised Total Coliform Rule RPT No No — — — Resolved May 15, 2017 Revised Total Coliform Rule
Oct 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2016 Consumer Confidence Rule
Oct 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2016 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2016 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2016 Consumer Confidence Rule
Jul 1, 2016 Sep 30, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 Dec 31, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2014 Sep 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2014 Total Coliform Rule
Sep 1, 2014 Sep 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Sep 30, 2014 Total Coliform Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Jul 1, 2014 Jul 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2014 Total Coliform Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Apr 1, 2014 Jun 30, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Mar 1, 2014 Mar 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2014 Total Coliform Rule
Mar 1, 2014 Mar 31, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2014 Total Coliform Rule
Jan 1, 2014 Mar 31, 2014 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2014 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2013 Dec 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2013 Jul 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2013 Total Coliform Rule
Jul 1, 2013 Jul 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2013 Total Coliform Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Aug 21, 2013 Consumer Confidence Rule
Apr 1, 2013 Jun 30, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2013 Apr 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2013 Total Coliform Rule
Apr 1, 2013 Apr 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2013 Total Coliform Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Jan 1, 2013 Mar 31, 2013 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2013 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2013 Jan 31, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jan 31, 2013 Total Coliform Rule
Oct 1, 2012 Oct 31, 2012 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2012 Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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