Drinking Water Treatment & Distribution System Operators
Last Update: July 11, 2014
In 1971, laws and regulations governing the certification of potable water treatment facility operation were enacted. They establish the level at which water treatment facilities should be manned; the minimum qualifications for testing at each of the five grade levels; and criteria for the renewal and revocation of certificates. They apply to a program consisting of ~13,000 certified water treatment operators. In 1998, the US EPA released Guidelines for the Certification and Recertification of Operators of Community and Nontransient Noncommunity Public Water Systems. Based on these guidelines, state regulations governing the certification of potable water treatment operators were revised to include distribution operators at five grade levels, effective January 2001. For more, see the California Operator Certification Program Annual Report (2012) (PDF).
Scroll to the bottom of this page for information about certification, the application and exam process, and continuing education and training.
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On July 1, 2014 the Drinking Water Program moved from CDPH to the State Water Resources Control Board (SWRCB). Find out more at http://www.swrcb.ca.gov/drinkingwater/index.shtml. This transfer includes the Drinking Water Treatment & Distribution System Operator Certification Program -- for information on how this transfer may affect the program, please review the Frequently Asked Questions (PDF).
Due to unforeseen circumstances beyond our control, sites for both Distribution and Treatment exams have been limited to the following locations: Fresno, Los Angeles, Redding, Sacramento, San Jose, San Bernardino, San Diego and Vallejo. We apologize for any inconvenience this may cause.
Distribution Exams Results
Water Distribution Exams (Word)
Treatment Exams Results
Water Treatment Exams (Word)
Certified Water Treatment Operators
Treatment Operators A-L (Excel)
Treatment Operators M-Z (Excel)
Certified Water Distribution Operators
Distribution Operators A-L (Excel)
Change of Address Form (PDF)
Operator Certification Program Contacts
Additional Contact Information
The Operator Certification Program is located at 1616 Capitol Avenue, Suite 74.250, Sacramento, California, 95814. For general information or inquiries, please contact the Operator Certification Program at:
Operator Certification Program (OpCert)
Drinking Water Program
State Water Resources Control Board
P.O. Box 997377, MS 7417
Sacramento, CA 95899-7377
Telephone: (916) 449-5611
Fax: (916) 449-5654
Follow these links for additional information: