Water Quality Reports

Western Water is committed to ensuring the safety and quality of the drinking water delivered to homes, businesses, and schools in our service area. Rigorous water monitoring and testing is conducted at more than 148 locations across the distribution system, performing more than 41,000 tests to monitor for contaminants and impurities.

As required by the Environmental Protection Agency and State Water Resources Control Board Division of Drinking Water, Western Water is pleased to make this report available to all customers by July 1 each year for the previous calendar year.

View and print Western Water's 2022 Annual Water Quality Report | Español (Issued on July 1, 2023)

Customers can request a printed copy using our online form or call us at 951.571.7104. Upon request, Western Water will mail a paper copy to you.

Water Quality Report Archives
2023 Annual Water Quality ReportEnglish (Coming soon)Español (muy pronto)
2022 Annual Water Quality ReportEnglishEspañol
2021 Annual Water Quality ReportEnglishEspañol
2020 Annual Water Quality ReportEnglishEspañol
2019 Annual Water Quality ReportEnglishEspañol
2018 Annual Water Quality ReportEnglish
2017 Annual Water Quality ReportEnglish
2016 Annual Water Quality ReportEnglish
2015 Annual Water Quality ReportEnglish
2014 Annual Water Quality ReportEnglish
2013 Annual Water Quality ReportEnglish
2012 Annual Water Quality ReportEnglish
2011 Annual Water Quality ReportEnglish
2010 Annual Water Quality ReportEnglish
2009 Annual Water Quality ReportEnglish
2008 Annual Water Quality ReportEnglish
2007 Annual Water Quality ReportEnglish
2006 Annual Water Quality ReportEnglish
2005 Annual Water Quality ReportEnglish
2004 Annual Water Quality ReportEnglish
2003 Annual Water Quality ReportEnglish
2002 Annual Water Quality ReportEnglish
2001 Annual Water Quality ReportEnglish