Bacteria and well water

Last time we spoke about bottled water and possible contamination.
Today a quick look at the challenges that well water may provide as it relates to bacteria.
Most well water passes for contamination levels such as total coliform and e-coli however there are 2 bacteria groups cryptosporidium and giardia that are usually not tested for.
Last week these 2 groups of bacteria were in the news again. A few years ago a survey in the US reported that 50% off the wells surveyed contained these bacteria.
Better safe then sorry advice would be to do one of 2 things.
1. Test your water for these bacteria.
2. Implement a strategy to eliminate these bacteria.
Several options are available depending on your unique situation.