This bill amends Arizona law to prohibit the use of lead in public water systems, requiring all new or modified water infrastructure to meet specific non-lead standards before construction or installation. It affects public water system operators, municipalities, and construction companies by mandating that plans and specifications for water treatment plants, distribution systems, and related devices be submitted for review to ensure compliance with lead-free requirements. The legislation also establishes fee structures for plan reviews, sets simplified procedures for small systems serving fewer than 3,300 people, and requires water quality testing and reporting to prevent lead contamination in drinking water.