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Active Management Area Water Atlas (139mb)
Table of Contents (2.6 mb)
Overview (25 mb)
Phoenix AMA (39 mb)
Pinal AMA (24 mb)
Prescott AMA (11 mb)
Santa Cruz AMA (11 mb)
Tucson AMA (26 mb)
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The AMA Water Atlas differs from the other volumes, please click here to read the preface.
The AMA Planning Area is composed of five groundwater basins located in the central and south central parts of the state. (Figure 8.0-2) The AMAs, established pursuant to the 1980 Groundwater Management Act, include the Santa Cruz AMA, the Tucson AMA, the Pinal AMA, the Phoenix AMA, and the Prescott AMA. The AMAs are located in portions of Santa Cruz, Pima, Pinal, and Maricopa counties as well as the central portion of Yavapai County. There are seven Indian reservations within the planning area including the Tohono O’odham (consisting of three reservations in the planning area), Pascua Yaqui, Ak-Chin, Gila River, Fort McDowell Yavapai, Salt River Pima-Maricopa and the Yavapai-Prescott.
In 2006, just over 82% of the state’s 6.2 million inhabitants lived in the planning area. In 2005, AMA populations ranged from approximately 47,200 residents in the Santa Cruz AMA to over 3,650,000 residents in the Phoenix AMA. In 2006 the Arizona Department of Commerce estimated that the state’s population would be approximately 10,348,000 by 2030 and would likely double by 2050 to over 12.8 million people. The majority of this growth will occur in the AMA Planning Area.
Between 2001-2005 an average of 3,659,480 acre-feet of water was used annually in the planning area for agricultural, municipal and industrial purposes (cultural water demand). Of this total demand, approximately 43% was met with groundwater supplies, 32% was met with Central Arizona Project (CAP) water, 21% was met with surface water and 4% was met with effluent or reclaimed water. During this time-period agriculture was the largest use sector in the planning area with an average annual demand of approximately 2,153,900 acre-feet or 59% of the total planning area demand. Municipal sector demand averaged about 1,273,100 acre-feet per year (AFA) (35%) and industrial sector demand averaged about 232,480 AFA (6%).