Marie Pearthree Pima County
Term Expires 12-31-2026

Marie S. Pearthree was elected to a six-year term on the CAWCD Board of Directors on November 3, 2020. She has lived in Tucson since 1978 and is honored to represent Pima County. Ms. Pearthree has 40 years of experience in the water industry, all of it in Arizona.

After receiving a Bachelor of Arts in Geology from Oberlin College in 1977, she moved to Tucson where she received a Master’s of Science degree in Geosciences from the University of Arizona in 1982.  Not long after she and her husband, Phil Pearthree, finished their graduate studies, they decided to make Tucson their home, having grown to love the community and the desert.

A registered Professional Engineer (Civil) in Arizona since 1990, Ms. Pearthree has held a wide variety of positions in consulting engineering, hydrology and water utility management, including Hydrologist with Cella Barr Associates; Principal Hydrologist with the Pima County Flood Control District; Program Manager, Water Treatment Administrator and Deputy Director at the City of Tucson Water Department; Senior Management Consultant/Principal Project Manager with CH2M Hill; and Assistant/Deputy General Manager at the Central Arizona Project.

She has served on the Board of Directors of the AZ Water Association, and on the Water Utility Council and Board of Directors of the American Water Works Association (AWWA). Ms. Pearthree is currently a member of the University of Arizona’s Geosciences Advisory Board. She most recently co-authored the book “Tucson Water Turnaround: Crisis to Success” with Michael J. McGuire. The book, which was published in 2020 by AWWA, documents Tucson’s experience with the introduction of CAP water in the mid-1990s and ultimate success in utilizing this renewable water supply.

Marie and Phil have raised two daughters, Genevieve and Kristin, who now have careers of their own in city planning and geosciences with the City of Flagstaff and the New Mexico Bureau of Geology, respectively.  They enjoy hiking and long bike rides, and are also avid skiers, readers and travelers.

mpearthree@cap-az.com