The following article has been reprinted from Opflow, Vol. 22, No. 2 (February 1996), by permission (Copyright © 1996, American Water Works Association).

• Radon: What You—and Your Customers—Should Know

Tucson Water has recently collected more than 500 water samples to measure the concentrations of radon throughout the water system. The results of this effort are summarized in the City Manager's September 27, 1999, memo to the Mayor and City Council, and detailed in the attachments.

• 9/27/99 Memo from the City Manager to the Mayor & City Council
  Results of Radon Testing in Tucson Water System (City-Wide and Outside the City)

Listed below are the maps and attachments referred to in the City Manager's memo. The large format maps mentioned in the memo are approximately 35 Megabytes each in size. In order to minimize download times, they have been converted to PDF files of 2 Mb sizes. Each of these maps is 59.21 inches wide by 37.625 inches high, so you will need to zoom in and/or out as well as scroll horizontally and/or vertically in order to view recognizable features.

Attachment A: 1999 Wellhead Radon Levels

• Map (wellhead.pdf, 2.03 Mb)
• Listing of wellheads, locations & radon levels (radonwells.pdf, 1.44 Mb)

Attachment B: 1999 Point Of Entry Radon Levels

• Map (poes.pdf, 1.88 Mb)
• Listing of POEs, locations & radon levels (radonpoes.pdf, 1.13 Mb)

Attachment C: 1999 Distribution System and Reservoir Radon Levels

• Map (distrib.pdf, 2.32 Mb)
• Listing of sample points, locations & radon levels (radondist.pdf, 1.65 Mb)
• Listing of reservoirs, locations & radon levels (radonreservoirs.pdf, 466 Kb)

More information about radon is also available through the following links:

• U.S. Environmental Protection Agency
• The National Academies Press
• Radon Information Center
• American Water Works Association