Amends the Environmental Protection Act. Provides that an owner or operator of a community water supply must (rather than may) provide a consumer notice by email (if an email address is available) when replacing a lead service line or repairing or replacing water mains with lead service lines or partial lead service lines attached to them. Requires a municipality with a population in excess of 1,000,000 inhabitants to publicly post, on its website, data related to the progress it has made in installing publicly-funded lead service lines. Amends the Residential Real Property Disclosure Act. Requires the seller to disclose on the real estate disclosure form any discovered concentration of or unsafe conditions relating to lead paint, lead water pipes, lead plumbing pipes or lead in the soil on the premises (rather than unsafe concentrations of or unsafe conditions relating to lead paint, lead water pipes, lead plumbing pipes or lead in the soil on the premises). House Amendment 1: Replaces everything after the enacting clause. Reinserts the provisions of the introduced bill with the following changes. Provides that a municipality with a population of more than 1,000,000 inhabitants shall publicly post on its website or arrange with the Environmental Protection Agency to have posted on the Agency's website data describing progress the municipality has made toward replacing (rather than installing) lead service lines. Removes a provision from the introduced bill that amended the Residential Real Property Disclosure Act to require sellers to disclose discovered concentrations (rather than unsafe conditions) relating to specified lead materials.