Creates the Lead Service Line Replacement Bonding Act. Authorizes the Illinois Environmental Protection Agency to issue up to $2,000,000,000 in bonds to provide funding for the Lead Service Line Replacement Loans Program. Defines key terms. Provides that bond proceeds may be used for loans to replace lead service lines, principal forgiveness or negative interest loans for disadvantaged communities, costs of issuance and administration, and refinancing or refunding of similar obligations.