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WILLIAMS CITY OF

Arizona — Community Water System — PWSID: AZ0403026

System Information

PWSIDAZ0403026
System NameWILLIAMS CITY 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
CityWILLIAMS
ZIP Code86046
Address113 S. First Street
OrganizationDENT, D
Phone928-635-4451

Population & Service

Population Served3,145
Service Connections1,883

Drinking Water Violations (295)

This water system has 295 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 — Consumer Confidence Rule Other No No — — — Resolved Aug 8, 2025 Consumer Confidence Rule
May 1, 2025 May 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved May 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2025 May 31, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved May 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Sep 30, 2024 Consumer Confidence Rule
Oct 2, 2023 — Consumer Confidence Rule Other No No — — — Resolved Sep 30, 2024 Consumer Confidence Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2023 May 31, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2023 Apr 30, 2023 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2023 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 31, 2023 — Public Notice Other No No — — — Resolved May 8, 2023 Public Notice Rule and Revised PN Rule
Jan 31, 2023 — Public Notice Other No No — — — Resolved May 8, 2023 Public Notice Rule and Revised PN Rule
Jan 1, 2023 Mar 31, 2023 CARBON, TOTAL MR No Yes — TT — Resolved Mar 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 CARBON, TOTAL MR No Yes — TT — Resolved Mar 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 2, 2022 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2022 Consumer Confidence Rule
Oct 2, 2022 — Consumer Confidence Rule Other No No — — — Resolved Oct 21, 2022 Consumer Confidence Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL MR No Yes — TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL TT Yes No .88 RATIO TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL TT Yes No .88 RATIO TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL MR No Yes — TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL TT Yes No .88 RATIO TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 CARBON, TOTAL TT Yes No .88 RATIO TT — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2022 Sep 30, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2022 Sep 30, 2022 CARBON, TOTAL TT Yes No 1.12 RATIO TT — Resolved Sep 30, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2022 Sep 30, 2022 CARBON, TOTAL TT Yes No 1.12 RATIO TT — Resolved Sep 30, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Mar 1, 2022 Mar 31, 2022 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2022 Surface Water Treatment Rule
Jan 1, 2022 Jan 31, 2022 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved Jan 31, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2022 Mar 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Jan 31, 2022 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved Jan 31, 2022 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2022 Mar 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Oct 31, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Nov 9, 2022 Lead and Copper Rule
Oct 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Nov 9, 2022 Lead and Copper Rule
Oct 1, 2021 Oct 31, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2021 — Lead and Copper Rule MR No No — TT — Resolved Nov 9, 2022 Lead and Copper Rule
Oct 1, 2021 Oct 31, 2021 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2021 Sep 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2021 Surface Water Treatment Rule
Sep 1, 2021 Sep 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2021 Surface Water Treatment Rule
Sep 1, 2021 Sep 30, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2021 Surface Water Treatment Rule
Mar 1, 2021 Mar 31, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2021 Surface Water Treatment Rule
Mar 1, 2021 Mar 31, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2021 Surface Water Treatment Rule
Mar 1, 2021 Mar 31, 2021 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2021 Surface Water Treatment Rule
Jan 31, 2020 — Public Notice Other No No — — — Resolved Apr 7, 2020 Public Notice Rule and Revised PN 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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