Sampling results 2022
Our sampling season helped us understand the lead distribution in our research area. Thanks to all who participated in making this possible: community members, volunteers, scientists, and partner organizations.
Methodology
We received a total of 54 sampling requests from inside and outside of the study area. The community members signed up for a soil test via an electronic form. Volunteers were assigned to visit the community members to take the samples following safety procedures.
The samples were analyzed at the NHMLA at the Minerals Lab, where each was pulverized, converted into a pellet, and analyzed in the XRF.
We sent reports to the community members and scheduled calls to review the results together.
During our conversations with community members, there was a consensus on the need to share this information with the public. Here we present the results of the 2022 sampling season as requested by the community scientists/ site hosts and the Pb team.
Lead content in samples from yards and community gardens 2022
Total samples: 54
Lead concentration California limit for residential soil: 80 mg/kg (ppm)*
* mg/kg = milligrams of lead per kilogram of soil, and it is also equivalent to ppm (parts per million)
These results are for information purposes only as part of an ongoing research project. The Mineralogy Lab at NHMLA provides accurate lead level results, but it is not a government-designated lead testing facility.
Prospering Backyards Lead Concentration Map (2022)
Click on the map to enter the interactive version
How to interpret the results
While there are no safe levels of lead, this graph demonstrates things to consider regarding gardening and the use of soil.
The results, graphs, and map show high lead levels in the communities outside the PIA area.
This information confirms the need to continue with our plan to find ways to reduce lead exposure through our Community Science research. At the same time, we continue to support local community organizations demanding a thorough cleanup from DTSC.
Modified from: Gardening on Lead-Contaminated Soils
Prospering backyards Community Scientists Cohort I
From the samples analyzed, we invited 15 community members with high lead levels to be part of the first cohort of Community Scientists (CS). Together we are in the process of testing the method of lead remediation using zeolites.
More updates soon!
Community Scientists at the in-person training session at the Natural History Museum of Los Angeles County.
