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Monitoring Unregulated Drinking Water Contaminants

Contact Us About Monitoring Unregulated Drinking Water Contaminants

Report an environmental violation
Report a Violation
Report possible violations of environmental laws and regulations.

Please submit your comments or questions to only one contact.

For UCMR 4 questions about monitoring requirements, sample location inventory, schedules or SDWARS, please email or call the UCMR Message Center managed by an EPA contractor, Great Lakes Environmental Center, Inc. (GLEC):

For all other comments or questions, please use mail or the form below. Be sure to include your email address on the form if you’d like a response.

Mailing Address:
U.S. EPA Office of Ground Water and Drinking Water
26 West Martin Luther King Drive
Mail Stop-140
Cincinnati, OH 45268