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LA CASITA WATER COMPANY 2

Arizona — Community Water System — PWSID: AZ0410410

System Information

PWSIDAZ0410410
System NameLA CASITA WATER COMPANY 2
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeMixed
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedDec 1, 2004
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityTUCSON
ZIP Code85754
AddressATT SOUTH WESTERN UTILITIES - COMPLIANCE
OrganizationLA CASITA WATER CO
Phone520-772-5397

Population & Service

Population Served261
Service Connections116

Drinking Water Violations (42)

This water system has 42 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
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Jul 1, 2019 Jul 31, 2019 Revised Total Coliform Rule MON No Yes — — — Resolved Jul 31, 2019 Revised Total Coliform Rule
Apr 1, 2011 Jun 30, 2011 Chlorine MR No Yes — 4.0 mg/L — Resolved May 1, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Mar 31, 2011 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2010 Dec 31, 2010 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2010 Sep 30, 2010 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Mar 31, 2010 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Oct 15, 2009 Consumer Confidence Rule
Apr 1, 2009 Jun 30, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Mar 31, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Mar 31, 2009 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2008 Jul 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2008 Total Coliform Rule
Jul 1, 2008 Jul 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 2008 Total Coliform Rule
Jul 1, 2008 — Consumer Confidence Rule Other No No — — — Resolved Nov 17, 2008 Consumer Confidence Rule
Jul 1, 2008 Sep 30, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2008 Sep 30, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 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 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 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
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
Apr 1, 2007 Jun 30, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2007 Mar 31, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Dec 1, 2004 Dec 31, 2004 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2004 Total Coliform 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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