Increasing consistency in the classifications of water systems.

HB 1615 modifies the classification of public water systems in Washington state. It specifies that a default number of people served per connection cannot be used to reclassify a Group B water system as a Group A water system. This change aims to ensure consistency in how these systems are categorized, directly affecting public water systems and the local health jurisdictions that regulate them. Additionally, it clarifies that local governments' authority to establish supplementary requirements for Group B systems must align with this revised classification method. The bill takes effect immediately upon signing.