How to sample your soil

If you live in King, Pierce, Thurston, or Snohomish counties you might qualify for free soil sampling, or your soil may have already been sampled through our Everett or Tacoma Smelter Plume programs. Search our interactive map to find out.

If you live in Stevens County, the EPA may have sampled your soil during past cleanup actions. Contact Cass Galasso, EPA project manager, to see whether your property has been sampled. You may also visit our upper Columbia River Lake Roosevelt site for more information.

If you live in Chelan, Douglas, Okanogan, Spokane, or Yakima counties, contact Rhonda Luke for more information. You may qualify for free soil sampling if you live on former orchard lands. 

If you are not eligible for soil sampling, or want to sample your own soil

Soil sampling is not difficult, and the tools you need can be found around the home. Depending on the number of samples, an average residential property should cost $90–$300 (prices checked in 2025).

This is a brief summary. For more detailed information, please download our Soil Sampling Guidance.

Steps to sample your own soil for arsenic and lead

1. Pick a lab — Search to find a certified lab — Select by Analyte: Arsenic.
2. Plan — Use our guide to decide how many samples you need and where to take them.
3. Collect — Take soil samples and don’t forget to always follow healthy actions.
4. Analyze — Send or take your soil samples to the lab.
5. Compare — See if your arsenic and lead levels could cause health risks. Follow our healthy actions to prevent health risks.