Wastewater Treatment Works Security Act of 2009

[AI summary unavailable — showing source text] Wastewater Treatment Works Security Act of 2009 - Amends the Federal Water Pollution Control Act (commonly known as the Clean Water Act) to require each owner or operator of a treatment works that stores or uses a substance of concern in quantities deemed by the Administrator of the Environmental Protection Agency (EPA) to pose a security risk to conduct a vulnerability assessment of its treatment works, which shall include a site security plan to identify specific security enhancements. Directs the Administrator to develop and publish guidelines for carrying out a vulnerability assessment and, in developing such guidelines, to: (1) develop standards for assigning individual treatment works to four risk-based classifications taking into consideration a works' size and proximity to large population centers and the potential impacts of intentional acts on public health or safety or the environment; (2) designate any chemical substance as a substance of concern; and (3) include a process for the revision, resubmission, and review of vulnerability assessments. Directs the Administrator to establish a threshold quantity for the release or theft of each such substance. Sets forth require…