Comprehensive Environmental Monitoring
For the area on and around San Onofre, SCE currently conducts year-round monitoring for radioisotopes in the:
- ocean water
- ground water
- surrounding sediment
- marine species
Samples are analyzed onsite as well as off-site by independent labs, as required by the Nuclear Regulatory Commission (NRC), the Environmental Protection Agency, and state programs and reported annually.
This program primarily analyzes samples from within a 15-mile radius of the plant (with control samples as far as 45 miles away). Locations include the rooftop of the Orange County Sheriff’s Department's San Clemente office; Camp Pendleton sites; and a test garden grown on the plant’s property.
SCE has created an interactive map that provides the location, type and frequency of marine sampling. All results are within federal regulatory limits. A full analysis can be found in the SONGS 2018 Annual Radiation Environmental Operating Reports.