Main Takeaways Hospital plumbing poses clinical risk because patients are immunocompromised and water is a direct route for infection. California facilities are subject to HCAI (formerly OSHPD) and the California Plumbing Code. The 2025 Title 24 code took effect January 1, 2026, adding Legionella controls for hot water systems. Since 2017, CMS certification has enforced […]