Reconnaissance studies of radioelements in the ground waters of Iowa indicate that, where radium is present, it is Ra226, the biologically significant isotope. Its distribution varies, but it appears that (1) waters from consolidated sandstones in areas distant from recharge points may contain up to 8 μ,μc/L Ra226; (2) waters from limestone aquifers vary but, in general, are likely to contain appreciable amounts, up to 3 μμc/L Ra226; and (3) waters from glacial aquifers contain little, if any, Ra226.
Proceedings of the Iowa Academy of Science
©1959 Iowa Academy of Science, Inc.
Brown, Charles N. and Morris, R.L.
"Naturally Occurring Radioelements in the Ground Waters of Iowa,"
Proceedings of the Iowa Academy of Science, 66(1), 270-271.
Available at: https://scholarworks.uni.edu/pias/vol66/iss1/38