Contact Us
Navajo Nation Environmental Protection Agency • Public Water Systems Supervision Program
NAME
 POSITION
 PHONE
Yolanda Barney
 Environmental Program Manager
 871-7715
Merle Chischilly
 Senior Environmental Specialist
 871-7891
Elisa Arviso
 Senior Hydrologist
 871-7893
Delfred Gene
 Civil Engineer
 871-7758
Dolly Beaver, P.E.
 Civil Engineer
 (928) 551-5471
Sandrina Tsosie
 Associate Civil Engineer
 (928) 551-5460
Philbert Morgan
 Environmental Specialist
 871-7752
Dawn Begay
 Environmental Specialist
 871-7943
Tommy Rock
 Environmental Specialist
 871-7709
Valerie Tannie
 Program & Projects Specialist
 871-7757
Michelle K. Silver
 GIS Technician
 871-7759
Melody Becenti
 Information System Technician
 871-7754
Philbert Yazzie
 Senior Office Specialist
 871-7755
Shileen Livingston
 Office Specialist
 871-7600
Rhonda Notah
 Office Assistant
 871-7753
Our office is located between the Dean C. Jackson Arena and Fair Office/Gorman Hall on the Navajo Nation
Fairgrounds on State Route 264 in Window Rock, Arizona.
Contact Information
Mailing Address

Post Office Box 339
Window Rock, AZ 86515
 Shipping Address

HWY 264, Navajo Nation Fairgrounds
Old Museum Bldg
Window Rock, AZ 86515
PWSSP Staff
How can we improve our service?
We welcome and value your comments and suggestions about our service to the Navajo Nation for
which we are here to ensure the safety of your drinking water with diligence and respect to all of our
clientele and the community. Your views help us understand the needs and shortfalls of our program so
that we may improve our services to you.

If you have comments or suggestions, or think we could improve any aspect of our service, please let us
know. It is also good to know when you think we have done something well or you were impressed by
the service we provided.

Privacy statement
NNEPA-PWSSP respects your right to privacy and we value the trust you place in us to handle your
information, whether it be confidential or sensitive. The information you have provided will be used for
the purpose for which you have provided. Note that compliments will be passed on to our staff
member(s) and our Program Manager.
Questions, comments, or feedback:
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