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2. Centers for Disease Control and Prevention. Community water fluoridation. Available at: http://www.cdc.gov/fluoridation. Accessed May 16, 2016.
3. California Water Boards, State Water Resources Control Board. Drinking water programs. Available at: https://www.waterboards.ca.gov/drinking_water/programs/index.shtml. Accessed March 6, 2017.
4. Office of Health Assessment and Epidemiology, Los Angeles County Department of Public Health. Key Indicators of Health by Service Planning Area Report. Available at: http://www.publichealth.lacounty.gov/ha/docs/2011LACHS/KIR2011/KIR_2013_FinalS.pdf. Accessed March 7, 2017.