I found that my backyard soil has very low lead levels from the UMass Soil & Plant Nutrient Testing Laboratory. You can test your soil lead levels, along with nutrient contents of your soil as it pertains to the types of plants you have by sending a sample and $20 to UMass: https://ag.umass.edu/services/soil-plant-nutrient-testing-la...
I just found that the University of New Hampshire offers a similar test with an additional heavy metals package available which covers cadmium, chromium, copper, lead, nickel & zinc: https://extension.unh.edu/resource/soil-testing-forms
I just found that the University of New Hampshire offers a similar test with an additional heavy metals package available which covers cadmium, chromium, copper, lead, nickel & zinc: https://extension.unh.edu/resource/soil-testing-forms