IDPH extends lead testing requirement to nearly 150 more high-risk ZIP codes Jul 8, 2024 | Pediatrics, Top Stories The Department of Public Health will add 148 areas to its list of ZIP codes at high risk for lead exposure.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.