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TONTO BASIN SCHOOL DISTRICT 33

Arizona — Non-Transient Non-Community — PWSID: AZ0404055

System Information

PWSIDAZ0404055
System NameTONTO BASIN SCHOOL DISTRICT 33
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolYes
WholesalerNo
First ReportedSep 27, 1990
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityTONTO BASIN
ZIP Code85553
Address445 S. OLD HWY 188
OrganizationWARREN, BOBBIE
Phone928-479-2277

Population & Service

Population Served90
Service Connections1

Drinking Water Violations (165)

This water system has 165 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
Aug 1, 2025 Aug 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Aug 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 22, 2025 — Revised Total Coliform Rule TT Yes No — — — Resolved Sep 15, 2025 Revised Total Coliform Rule
May 22, 2025 — Revised Total Coliform Rule TT Yes No — — — Resolved Sep 15, 2025 Revised Total Coliform Rule
May 22, 2025 — Revised Total Coliform Rule TT Yes No — — — Resolved Sep 15, 2025 Revised Total Coliform Rule
Dec 20, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Dec 20, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Dec 20, 2024 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Feb 23, 2025 Lead and Copper Rule Revisions
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Nov 17, 2023 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Nov 17, 2023 Lead and Copper Rule
Jul 28, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Dec 15, 2023 Revised Total Coliform Rule
Jul 28, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Dec 15, 2023 Revised Total Coliform Rule
Jul 28, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Dec 15, 2023 Revised Total Coliform Rule
Jul 28, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Dec 15, 2023 Revised Total Coliform Rule
Jul 13, 2023 — E. COLI MR No Yes — — — Resolved Aug 23, 2023 Ground Water Rule
Jul 13, 2023 — E. COLI MR No Yes — — — Resolved Aug 23, 2023 Ground Water Rule
Nov 22, 2022 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 13, 2023 Revised Total Coliform Rule
Nov 22, 2022 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 13, 2023 Revised Total Coliform Rule
Nov 22, 2022 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 13, 2023 Revised Total Coliform Rule
Nov 22, 2022 — Revised Total Coliform Rule TT Yes No — — — Resolved Jan 13, 2023 Revised Total Coliform Rule
Nov 5, 2022 — E. COLI MR No Yes — — — Resolved Jan 27, 2023 Ground Water Rule
Nov 5, 2022 — E. COLI MR No Yes — — — Resolved Jan 27, 2023 Ground Water Rule
Nov 5, 2022 — E. COLI MR No Yes — — — Resolved Jan 27, 2023 Ground Water Rule
Nov 5, 2022 — E. COLI MR No Yes — — — Resolved Jan 27, 2023 Ground Water Rule
Feb 26, 2021 — Public Notice Other No No — — — Resolved May 4, 2023 Public Notice Rule and Revised PN Rule
Feb 26, 2021 — Public Notice Other No No — — — Resolved May 4, 2023 Public Notice Rule and Revised PN Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Nov 2, 2020 Lead and Copper Rule
Jan 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Nov 2, 2020 Lead and Copper Rule
Sep 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 25, 2020 Revised Total Coliform Rule
Sep 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 25, 2020 Revised Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Jun 1, 2010 Jun 30, 2010 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2010 Total Coliform Rule
Jun 1, 2010 Jun 30, 2010 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2010 Total Coliform Rule
Feb 1, 2009 Feb 28, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2009 Total Coliform Rule
Feb 1, 2009 Feb 28, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2009 Total Coliform Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2008 Total Coliform Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2008 Total Coliform Rule
Apr 1, 2008 Jun 30, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2008 Jun 30, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Mar 31, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Mar 31, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Dec 31, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Dec 31, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2007 Sep 30, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts 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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