Water Quality Information

Water Quality Information

2017 water quality report

Download Annual Water Quality Report here



If you wish to have a paper copy of the above report mailed to you, please email info@irwd.com and provide your mailing address. For other questions or issues regarding your water, you can email customerservice@irwd.com.

You can trust IRWD to provide clean, safe water. Delivering high-quality drinking water is at the heart of our mission. We understand the importance of water in life. Everything we do is aimed at providing our customers with the best water possible. Rest assured, when you turn on the tap, the water is safe to drink.

Providing our customers with safe, high quality drinking water is IRWD's top priority. Our drinking water is safe and meets or exceeds all quality standards set by both the state and federal government. Our Water Quality staff continuously monitors the water supply, conducting over a quarter of a million laboratory tests each year from water taken from over 99 sample points throughout the District. We are proud to have a state-of-the-art Water Quality Laboratory that is state certified. IRWD's commitment to innovation makes it one of the best equipped water laboratories in Southern California.

If you have questions, concerns or problems regarding water quality issues such as taste, odor, appearance, etc., please review the frequently asked questions below or contact our Customer Service specialists at (949) 453-5300.


Learn More about Water Quality Regulations

We know these are complicated.  Click here to read more detail on state and federal regulations and what they mean.


Frequently Asked Questions

Questions about Portola High School and IRWD Recycled Water?+
Why does my water sometimes look cloudy?+
Why does my water taste or smell different during different times of the year?+
Do I need bottled or filtered water for safety?+
Do I have hard water?+
What type of water softener should I use?+
Does IRWD add fluoride to the water?+
How much sodium is in the water?+
Why does my water smell like rotten eggs?+
Is water treated with chloramines hazardous to some pets?+
What is chromium?+
How do I flush my water heater?+
How do I store water for an emergency?+
Lead and Copper Rule and IRWD Test Results+

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