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ST JOHNS CITY OF

Arizona — Community Water System — PWSID: AZ0401012

System Information

PWSIDAZ0401012
System NameST JOHNS CITY OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 24, 1980
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CitySAINT JOHNS
ZIP Code85936
Address—
OrganizationST JOHNS CITY OF
Phone928-245-3651

Population & Service

Population Served3,500
Service Connections1,275

Drinking Water Violations (236)

This water system has 236 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, 2025 Sep 30, 2025 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Jan 1, 2025 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 1, 2023 Lead and Copper Rule
Jan 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 1, 2023 Lead and Copper Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Nov 25, 2022 Lead and Copper Rule
Oct 1, 2022 — Lead and Copper Rule MR No No — TT — Resolved Nov 25, 2022 Lead and Copper Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2021 Radionuclides and Revised Rad Rule
Oct 1, 2021 Dec 31, 2021 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2021 Radionuclides and Revised Rad Rule
Jan 1, 2021 Mar 31, 2021 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2021 Mar 31, 2021 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 11, 2020 Revised Total Coliform Rule
Nov 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 11, 2020 Revised Total Coliform Rule
Aug 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 11, 2020 Revised Total Coliform Rule
Aug 1, 2020 — Revised Total Coliform Rule RPT No No — — — Resolved Aug 11, 2020 Revised Total Coliform Rule
Apr 1, 2020 Jun 30, 2020 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2020 Radionuclides and Revised Rad Rule
Apr 1, 2020 Jun 30, 2020 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 Jun 30, 2020 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2020 Radionuclides and Revised Rad Rule
Apr 1, 2020 Jun 30, 2020 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 22, 2020 Lead and Copper Rule
Jan 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 22, 2020 Lead and Copper Rule
Oct 2, 2019 — Consumer Confidence Rule Other No No — — — Resolved Dec 19, 2019 Consumer Confidence Rule
Oct 2, 2019 — Consumer Confidence Rule Other No No — — — Resolved Dec 19, 2019 Consumer Confidence Rule
Oct 2, 2019 — Consumer Confidence Rule Other No No — — — Resolved Dec 19, 2019 Consumer Confidence Rule
Oct 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Oct 30, 2019 Lead and Copper Rule
Oct 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Oct 30, 2019 Lead and Copper Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 1, 2020 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 1, 2020 Consumer Confidence Rule
Apr 1, 2019 Jun 30, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2019 Radionuclides and Revised Rad Rule
Apr 1, 2019 Jun 30, 2019 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2019 Radionuclides and Revised Rad Rule
Jan 1, 2019 Mar 31, 2019 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2018 Aug 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2018 Revised Total Coliform Rule
Aug 1, 2018 Aug 31, 2018 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2018 Revised Total Coliform Rule
Apr 1, 2018 Jun 30, 2018 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2018 Radionuclides and Revised Rad Rule
Apr 1, 2018 Jun 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2018 Jun 30, 2018 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Jun 30, 2018 Radionuclides and Revised Rad Rule
Apr 1, 2018 Jun 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2017 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2017 Sep 30, 2017 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2017 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 26, 2016 Consumer Confidence Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 Dec 31, 2016 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2016 Radionuclides and Revised Rad Rule
Oct 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Oct 26, 2016 Consumer Confidence 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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