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Contact Pacific Southwest Waste Program

Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

Evoqua Water Technologies

Note: Evoqua Water Technologies has previously been known as Siemens, US Filter, and Westates. The facility is now referred to as Evoqua, but the prior names remain in older documents attached to this web page.

Photograph taken of site from a distance.
Evoqua Water Technologies
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EPA Contacts

Evoqua Identification

RCRA ID Number: AZD982441263
2523 Mutahar Street
Parker, AZ 85344
La Paz County

Evoqua Water Technologies LLC (Evoqua) operates a carbon regeneration facility located on the Colorado River Indian Tribes (CRIT) reservation near Parker, Arizona. Evoqua's process involves treating spent carbon in a regeneration furnace to purify it and make it available for reuse as a commercial product. The carbon that Evoqua receives has been used to remove contaminants from air emissions and contaminated water at other sites. Evoqua receives annually over 5,000 tons of spent carbon from 30 - 35 states across the United States. About 11% of this spent carbon is considered hazardous waste and is regulated by the U.S. Environmental Protection Agency (EPA).

EPA is responsible under the Resource Conservation and Recovery Act (RCRA) for permitting facilities that manage RCRA-regulated hazardous wastes on tribal lands. Starting in 1991, EPA required new carbon regeneration furnaces to obtain hazardous waste permits. Like Evoqua (then known as US Filter / Westates), several facilities were already operating or had begun construction on carbon regeneration furnaces. These pre-existing facilities operate under an "interim status" designation while applying for a RCRA hazardous waste permit.

The first part of the permit application for the Evoqua Parker facility was submitted to EPA in 1995. There have been several sets of comments and requests for information from EPA that Evoqua addressed. As a result, several revisions to the permit application have been submitted by Evoqua to EPA.

Contact Information

If you have questions or concerns about Evoqua or about EPA's permit process, please let us know by phone, email, or letter.

"Mike" Mahfouz Zabaneh, P.E. (zabaneh.mahfouz@epa.gov)
(415) 972-3348 | FAX: (415) 947-3533
Environmental Engineer/Project Manager
Permits Office, Land Division
Mailing Address:
U.S. EPA Region 9
75 Hawthorne Street
Mail Code LND-4-2
San Francisco, CA 94105

Media Inquiries

Margot Perez-Sullivan (perezsullivan.margot@epa.gov)
(415) 947-4149

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