Rick,

Check these posts and responses for some additional information:

Steri-pen


Strei-pen



Keep in mind that the Strei-pen does not remove any chemical contamination. If you suspect the water you will be consuming may or does contain chemical contaminates, you should consider that non-activated charcoal filtering systems (or RO systems or chelating chemicals), which include the Steri-pen, MIOX or chemical biocides would not be effective in removal of these.

Pete