First let me say… I love Wisconsin! When it comes to lead they have historically had some of the best and most progressive programs in the country, so I was completely unsurprised to find this research with a little bit of a google search!
Below is a screenshot from the University of Wisconsin website of a post about lead-in-eggs, with a resource for having your eggs tested. Please note this was originally published in 2012 and may no longer be current but the contact information is also on the screenshot, so it could be worth a call if you are interested in having your eggs tested for lead. Click on the image below to see the full post as a downloadable PDF, or click here to get to the original web page.