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UNIVERSITY OF ARIZONA

Arizona — Non-Transient Non-Community — PWSID: AZ0420423

System Information

PWSIDAZ0420423
System NameUNIVERSITY OF ARIZONA
System TypeNon-Transient Non-Community
Water SourceGround Water
Activity StatusActive
Owner TypeState
EPA Region09
Serves SchoolYes
WholesalerNo
First ReportedOct 5, 1979
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityTUCSON
ZIP Code85754
AddressPO BOX 85160
OrganizationUNIVERSITY OF ARIZONA
Phone602-795-8276

Population & Service

Population Served50,000
Service Connections139

Drinking Water Violations (1,157)

This water system has 1,157 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
Oct 1, 2021 Dec 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2021 Dec 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2020 Jan 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2020 Jan 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2020 Jan 31, 2021 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2020 Jan 31, 2021 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2021 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 16, 2020 Lead and Copper Rule
Jan 1, 2020 — Lead and Copper Rule MR No No — TT — Resolved Jan 16, 2020 Lead and Copper Rule
Oct 31, 2019 — E. COLI MR No Yes — — — Resolved Dec 6, 2019 Ground Water Rule
Oct 31, 2019 — E. COLI MR No Yes — — — Resolved Dec 6, 2019 Ground Water Rule
Oct 31, 2019 — E. COLI MR No Yes — — — Resolved Dec 6, 2019 Ground Water Rule
Aug 1, 2018 Oct 31, 2018 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2018 Oct 31, 2018 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2018 Oct 31, 2018 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2018 Oct 31, 2018 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2018 Jul 31, 2018 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jul 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2018 Jul 31, 2018 TTHM MR No Yes — 0.080 mg/L — Resolved Jul 31, 2018 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2017 Mar 31, 2017 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Mar 31, 2017 Synthetic Organic Chemicals
Nov 1, 2016 Jan 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Nov 1, 2016 Jan 31, 2017 TTHM MR No Yes — 0.080 mg/L — Resolved Jan 31, 2017 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2016 Dec 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Aug 1, 2016 Oct 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2016 Oct 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Oct 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2015 Dec 31, 2015 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2015 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 20, 2014 — E. COLI MR No No — — — Resolved Sep 30, 2014 Ground Water Rule
Jun 20, 2014 — E. COLI MR No No — — — Resolved Sep 30, 2014 Ground Water Rule
Jan 1, 2013 Dec 31, 2015 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals
Jan 1, 2013 Dec 31, 2015 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals
Jan 1, 2013 Dec 31, 2015 Xylenes, Total MR No Yes — 10 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals
Jan 1, 2013 Dec 31, 2015 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals
Jan 1, 2013 Dec 31, 2015 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals
Jan 1, 2013 Dec 31, 2015 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Jul 31, 2013 Volatile Organic Chemicals

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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