General Information
If a drinking water treatment device claims to reduce toxic chemicals or makes other health-related performance claims, the California Department of Health Services (CDHS) must certify the device. There are 350 different California-certified water treatment devices. Unfortunately, many uncertified devices are also sold to unsuspecting customers. Devices certified by the state will have a label with the California certification number. In addition, each device will be accompanied by a state certificate listing the contaminants that the device has been proven to effectively reduce. To inquire about certified residential water treatment devices, contact the California Department of Health Services at (916) 449-5650 or visit their web site: www.dhs.ca.gov/ps/ddwem/technical/certification/Devices.html.

Water devices that claim to improve aesthetic qualities such as taste and odor are not regulated by the California Department of Health Services.

Before purchasing or using a water treatment device, learn more about:

• the meaning of California certification
• concerns regarding the use of non-certified devices
• what to consider when deciding whether to purchase a water treatment device
• recommendations regarding water testing

For information on these topics and related subjects, visit the page Frequently Asked Questions about Residential Water Treatment Devices issued by the California Department of Health Services.