Lower Umatilla Basin Well Test
	This study is designed to find out if reverse osmosis (RO) units are effective at reducing nitrate and perchlorate levels in groundwater from local wells. EPA is looking for local residents with a RO unit installed in their home who want to participate in a study during the summer of 2009. Sign up by contacting EPA at 1-800-424-4372 or e-mail: perkins.brandon@epa.gov. Participants will be notified as soon as the sampling dates are set. During the study, samples will be collected by an EPA authorized contractor. The contractor will also collect information about the RO unit, such as, the brand, the age, and the type and frequency of maintenance it has received. This may involve participants speaking with the contractor or filling out an information form. Individual results will be available to each participant in the study approximately six to twelve months after the sampling is completed. If the assessment shows that RO units are effective, EPA may also suggest RO units as a way for other concerned residents to reduce exposure to nitrates and perchlorate.

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