Welcome to the State of California 

Water Treatment Device Certification: Application Information

Last Update:  November 12, 2003


NOTE: This page and the linked pages below are for historical reference only, due to statutory changes -- for information about the current Residential Water Treatment Device Program, click here.


1. How long does it take to get a device certified? This depends on several things -- most within the control of the applicant.

  • Turn in a complete application package (use the application checklist).
  • Make sure the promotional materials are in compliance (see guidance).
  • We will review your application and let you know if anything is missing or needs revising. At that point, you control the time frame again.
  • Occasionally, we receive more applications that we can keep up with and a backlog develops. You can call us when you submit an application and we will give you an estimate as to when we can begin reviewing your application.

2. Test Data: If you plan to do anything other than use one of the California approved labs to conduct the approved test protocols for your device (see Section 60435 of the regulations), you need to submit your request or proposal to us in writing. The proposal must be approved before submitting your application or you risk having your application rejected on the basis of inadequate or unacceptable test data.

3. Application fees are non refundable.

4. California does not consider chlorine reduction to be a health claim. We do not certify devices for chlorine reduction. However, claims for trihalomethane (THM) reduction are regulated.

5. You may list more than one model name on an application as long as all the devices are identical. Any differences must be cosmetic, such as different colors or different labeling. Differences such as size, cartridges, configuration or health claims would require a new application and certification.

6. Promotional Materials: Submit all promotional materials that will be used to market the device (includes brochures, packaging, videos, retail ad copy, etc.). We review all promotional materials for consistency with the certified health claims and other information listed on a certificate. If promotional materials are not consistent with certified health claims, a certificate will not be issued until the promotional materials are revised. (see guidance for promotional materials)

7. The water treatment device industry polices itself very effectively. If any questionable or illegal promotional material is circulated in California, or uncertified changes made to a device, you can be sure that evidence will be turned in to us for appropriate enforcement action.

8. If you are claiming bacteriostatic properties (based on silver or other chemicals) for your filter, you must also register the device with the California Department of Pesticide Regulation (CDPR) (required in California). KDF products can make bacteriostatic claims without registration with CDPR.  (For more, see regulation of bacteriostatic water filters)

For More Information

For more information about residential water treatment devices, contact us at: 

California Department of Public Health
Drinking Water Program
Drinking Water Treatment Device Certification Unit
P.O. Box 997377, MS 7417
Sacramento, CA 95899-7377
(916) 449-5600 (phone) 
(916) 449-5656 (fax)

Last modified on: 5/27/2014 11:56 AM