Baseline Radioactivity in Arizonaʼs Water

Abstract
The Arizona [USA], Atomic Energy Commission and Arizona State University implemented a statewide radiologic environmental monitoring system to evaluate existing and future radioactivity levels in water. After 3 yr, approximately 650 samples were assayed for gross .alpha. and gross .beta. activity. Wherever high gross .alpha. results appear, a separate Ra assay is performed. The statewide average for gross activity is 4.9 pCi/l; gross .beta. activity is 6.4 pCi/l; Ra is 0.2 pCi/l. No trends or abnormally high radioactivity levels were observed. Values compare favorably with published results for adjacent states and other areas of the world.

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