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COLDWATER CANYON 1

Arizona — Community Water System — PWSID: AZ0413020

System Information

PWSIDAZ0413020
System NameCOLDWATER CANYON 1
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedOct 5, 1979
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityTUCSON
ZIP Code85745
AddressATTN VERONICA WENE
OrganizationCOLDWATER CANYON WATER CO
Phone520-624-1460

Population & Service

Population Served541
Service Connections239

Drinking Water Violations (167)

This water system has 167 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 Arsenic MR No Yes — 0.010 mg/L — Archived Sep 30, 2025 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Arsenic MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2023 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Arsenic MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2023 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Arsenic MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2023 Arsenic Rule
Apr 1, 2023 Jun 30, 2023 Arsenic MCL Yes No .014 MG/L 0.010 mg/L .01 Resolved Jun 30, 2023 Arsenic Rule
Jan 1, 2023 Mar 31, 2023 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Mar 31, 2023 Arsenic Rule
Jan 1, 2023 Mar 31, 2023 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Mar 31, 2023 Arsenic Rule
Jan 1, 2023 Mar 31, 2023 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Mar 31, 2023 Arsenic Rule
Jan 1, 2023 Mar 31, 2023 Arsenic MCL Yes No .018 MG/L 0.010 mg/L .01 Resolved Mar 31, 2023 Arsenic Rule
Nov 14, 2022 — Public Notice Other No No — — — Resolved Feb 16, 2023 Public Notice Rule and Revised PN Rule
Nov 14, 2022 — Public Notice Other No No — — — Resolved Feb 16, 2023 Public Notice Rule and Revised PN Rule
Oct 1, 2022 Dec 31, 2022 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Dec 31, 2022 Arsenic Rule
Oct 1, 2022 Dec 31, 2022 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Dec 31, 2022 Arsenic Rule
Oct 1, 2022 Dec 31, 2022 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Dec 31, 2022 Arsenic Rule
Oct 1, 2022 Dec 31, 2022 Arsenic MCL Yes No .015 MG/L 0.010 mg/L .01 Resolved Dec 31, 2022 Arsenic 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 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 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 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 Arsenic MCL Yes No .016 MG/L 0.010 mg/L .01 Resolved Sep 30, 2022 Arsenic Rule
Jul 1, 2022 Sep 30, 2022 Arsenic MCL Yes No .016 MG/L 0.010 mg/L .01 Resolved Sep 30, 2022 Arsenic Rule
Jul 1, 2022 Sep 30, 2022 Arsenic MCL Yes No .016 MG/L 0.010 mg/L .01 Resolved Sep 30, 2022 Arsenic Rule
Jul 1, 2022 Sep 30, 2022 Arsenic MCL Yes No .016 MG/L 0.010 mg/L .01 Resolved Sep 30, 2022 Arsenic Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Sep 1, 2022 Consumer Confidence Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Sep 1, 2022 Consumer Confidence Rule
Apr 1, 2022 Jun 30, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2022 Jun 30, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2022 Stage 1 Disinfectants and Disinfection Byproducts 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 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Oct 1, 2019 Dec 31, 2019 Arsenic MR No Yes — 0.010 mg/L — Resolved Dec 31, 2019 Arsenic Rule
Oct 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Oct 2, 2020 Lead and Copper Rule
Oct 1, 2019 — Lead and Copper Rule MR No No — TT — Resolved Oct 2, 2020 Lead and Copper Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2019 Consumer Confidence Rule
Jul 1, 2019 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2019 Consumer Confidence Rule
Oct 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Oct 2, 2020 Lead and Copper Rule
Oct 1, 2018 — Lead and Copper Rule MR No No — TT — Resolved Oct 2, 2020 Lead and Copper Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Arsenic MR No Yes — 0.010 mg/L — Resolved Sep 30, 2018 Arsenic Rule
Jul 1, 2018 Sep 30, 2018 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2018 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 3, 2017 — Lead and Copper Rule MR No No — TT — Resolved Apr 11, 2018 Lead and Copper Rule
Nov 3, 2017 — Lead and Copper Rule MR No No — TT — Resolved Apr 11, 2018 Lead and Copper Rule
Oct 1, 2017 Oct 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2017 Revised Total Coliform Rule
Oct 1, 2017 Oct 31, 2017 Revised Total Coliform Rule MON No Yes — — — Resolved Oct 31, 2017 Revised Total Coliform Rule
Oct 1, 2016 Dec 31, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Dec 31, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2016 Aug 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Aug 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2016 Aug 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Aug 31, 2017 Stage 2 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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