Disaster Response

Testing soil safety after L.A. wildfires

Protecting Angelenos from dangerous contamination with free rapid-response soil testing. Our Contaminant Level Evaluation and Analysis for Neighborhoods (CLEAN) project is a USC program separate from L.A. Dept. of Public Health soil testing. CLEAN is funded by FireAid and LA Care.

Interpreting your results

Results will be uploaded to this google sheet as soon as possible, and mapped onto the interactive map. You will be notified by email as soon as your results are ready—typically within 4-6 weeks of the date when you drop off your sample.

For help understanding your results, recommendations for precautionary measures to reduce your and your family’s risk of exposure, and additional resources, please see our lead interpretation guide (en español aquí)

Check out the Results Sheet

Updated Regularly

Read the Lead Guide

October 2025

Explore preliminary CLEAN results

June 2025

Samples Map

This map will be updated regularly as new samples are processed and analyzed.

Recent Updates


Related Projects


Public Exchange goes national!
Find out more