Frequently Asked Questions

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Fluoridation Frequently Asked Questions

Understanding the Safe Drinking Water Act

Obtain more information about contaminants and potential health effects by calling the USEPA's Safe Drinking Water Hotline (1-800-426-4791)

Water must go through an extensive treatment process before it is considered safe to drink. Also, your drinking water is protected from unsafe levels of chemicals and bacteria by regularly scheduled testing.

Drinking water wells are tested weekly, monthly, quarterly, annually or up to once every five years depending on the type of chemical, the vulnerability of the well to nearby potential sources of contamination and historic water quality information. Wells that may have the potential to be contaminated are tested more frequently. Testing intervals are set by the California Department of Health Services. Historically, California standards are more stringent than the federal counterparts.

Some people may be more vulnerable to contaminants in drinking water than the general population. Immunocompromised persons such as persons with cancer undergoing chemotherapy, persons who have undergone organ transplants, people with HIV/AIDS or other immune system disorders, some elderly and infants can be particularly at risk from infections. These people should seek advice about drinking water from their health care providers.

The Environmental Protection Agency/Centers for Disease Control sets guidelines on appropriate means to lessen the risk of infection of Cryptosporidium and other microbial contaminants. For more information on your household water supply, contact your water provider by calling the telephone number on your water bill.