The Sweetwater Authority, which supplies drinking water to more than 200,000 households in southern San Diego County, alerted city officials in its service area on Friday that it had discovered toxic industrial chemicals in its main reservoir at levels that exceed state and federal standards.  The PFAS chemicals, also known as “forever” chemicals because of their longevity in the environment, were discovered during newly mandated testing in late October. The chemicals, known by the technical names PFHxS and PFOA, have been shown to interfere with thyroid function and cause cancer in laboratory animals. 

Other water quality article:

• 10News San Diego: EPA bans cancer-causing chemicals commonly used in cleaning products