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Pacific Southwest, Region 9

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

Evoqua Water Technologies
(formerly Siemens Carbon Regeneration Facility)


Mapping capability for many kinds of sites, including hazardous waste, superfund, etc.

Evoqua Identification

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

Evoqua Water Technologies (or “Evoqua”) is a carbon regeneration facility located on the Colorado River Indian Reservation near Parker, Arizona. US EPA is responsible under the Resource Conservation and Recovery Act (RCRA) for permitting facilities that process hazardous wastes on tribal lands.

Evoqua uses thermal treatment to regenerate spent carbon so that it can be used again, and has been treating spent carbon since 1992. Each year, this facility receives over 5,000 tons of spent carbon from 30-35 states across the United States. Less than 15% of this spent carbon is considered hazardous waste under EPA regulations.

The Evoqua carbon regeneration facility is currently operating under “interim status” as set out under RCRA regulations. Interim status was triggered by the Facility’s submittal of an initial Part A Permit Application, which was endorsed by the Colorado River Indian Tribes (CRIT). CRIT also signed as co-applicant on the Part B permit application, which requests final permit status, on December 14, 2009. This restarted the permit application review which was on standby until the CRIT signature was received.

EPA received Evoqua’s revised permit application on 4/27/12 and is currently reviewing the full application for completeness and technical adequacy as part of the permit decision-making process. After the review has been completed, EPA may issue or deny a permit to allow Evoqua to continue processing hazardous waste. See the full application »

(NOTE: Evoqua Water Technologies has previously been known as Siemens Industries, Inc., Siemens Water Technologies, 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.)

Contact Information

Evoqua Water Technologies

If you have questions or concerns about Evoqua or about EPA's permit process, please let us know by phone, email, or letter. If you would like to receive fact sheets and public notice information from EPA or information in languages other than English, please contact the EPA Community Involvement Coordinator listed below.

Technical or General Project Questions

"Mike" Mahfouz Zabaneh, P.E. (Zabaneh.Mahfouz@epa.gov)
(415) 972-3348
Environmental Engineer/Project Manager
RCRA Facilities Management Office
75 Hawthorne Street
Mail Code WST-4
San Francisco, CA 94105
FAX: 947-3533

Public Participation & Community Involvement Issues

Dana Barton (barton.dana@epa.gov)
US EPA Community Involvement Coordinator
(415) 972-3087
75 Hawthorne Street
Mail Code (SFD6-3)
San Francisco, CA 94105

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