Drinking Water System Security Act of 2009

[AI summary unavailable — showing source text] Drinking Water System Security Act of 2009 - Amends the Safe Drinking Water Act to revise and expand requirements for assessments by covered water systems of their vulnerability to intentional acts of sabotage. Defines "covered water system" as a public water system that is a community water system serving a population greater than 3,300 or that presents a security risk requiring the issuance of regulations. Directs the Administrator of the Environmental Protection Agency (EPA) to issue regulations to: (1) establish tiered risk-based performance standards for the security of covered water systems and requirements and deadlines for such systems to conduct and update vulnerability assessments; (2) develop site security and emergency response plans for such systems; and (3) provide annual training to system employees and contractor employees. Sets forth matters which such regulations must address, including the vulnerability of a water system to intentional acts, levels of risk, and the role of employees in developing site security and emergency risk plans. Requires the Administrator to review and approve the vulnerability assessments and site security plans of covered water…