Mode of access: Internet from the USGS web site. Address as of 4/11/07: http://pubs.usgs.gov/sir/2006/5138/; current access is available via PURL..
Note
Title from HTML title screen (viewed on Apr. 11, 2007).
At head of title on HTML title screen: National Water-Quality Assessment Program.
File Type
The content of this report, published on CD-ROM, is a companion to SIR2006-5138, and includes the data base used for the report. The data are provided in MS Access format and in ASCII flat file format.