As the US Environmental Protection Agency (USEPA) lowered the arsenic maximum contaminant level (MCL) to 10 micrograms/liter (Au/L), the utilities that are dependent on groundwater, are looking for options to bring their system in compliance before the stated deadline of January 23, 2006. Similar to many other utilities in the Western United States, arsenic is a concern for the City of Peoria, Arizona. Twelve wells were identified with elevated arsenic. This study evaluated the available non-treatment and treatment techniques to develop strategies for bringing the City groundwater to compliance. This paper describes the process used to develop a compliance plan for the City of Peoria. Includes 8 references, tables, figures.