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affiliated with

American Hiking Society

Leave No Trace

 

go to Wilderness Medical Society>
Archives>
Volume 19, Number 2
June 2008

and look for:

Risk Factors for Coliform Bacteria in Backcountry Lakes and Streams


but that may give you only the abstract, so put this:

Risk Factors for Coliform Bacteria in Backcountry Lakes and Streams

into your search engine, and you should get lots of copies for free


or view a summary at the PCTA website

or if it has moved, go to http://PCTA.org and Search: Sierra Mountain Water: Is It Safe to Drink?

 

 

                          
                                     maps and website by Michael Jones