Half of California Waterways Contaminated With PFAS Pesticides

Widespread Contamination Detected

Approximately half of California waterways tested by regulators are contaminated with per- and polyfluoroalkyl substances (PFAS), according to a recent analysis. These substances, commonly referred to as "forever chemicals," were detected in many of the state's streams and rivers, including those that serve as drinking water sources.

The findings indicate that PFAS pesticides have tainted both surface water and sediment across the state,. The Environmental Working Group (EWG) noted that these contaminants pose risks to public health and highlighted a pressing need for stronger environmental research,.

Impact on Food and Agriculture

The presence of PFAS extends beyond waterways into the state's food supply. In 2023, California regulators tested samples of nonorganic fruits and vegetables and found PFAS chemicals in 40% of those samples.

In response to these findings, California lawmakers are considering legislation that would ban the use of these "forever" pesticides in foods,.

Infrastructure and Remediation Efforts

While state-level legislative efforts target the source of the chemicals, federal funding has been allocated for treatment infrastructure in Southern California. The U.S. Environmental Protection Agency (EPA) awarded $15.7 million for various PFAS treatment projects.

Specific allocations include: - Orange County Water District: $1.75 million for ion exchange treatment systems at Santa Ana Wells 27 and 28. - City of South Gate: Nearly $960,000 to treat four PFAS-impacted wells that provide more than half of the city's water demand. - City of Riverside: Nearly $960,000 for modifications to the Palmyrita Water Treatment Plant to enable PFAS removal. - Santa Margarita Water District: Nearly $960,000 for preliminary design work on the Ranch Water Filtration Plant to support potable reuse efforts.