Advanced Backcountry Water Purifier for Severe Contamination

The user is planning a trip with known E. coli contamination and potential industrial runoff, seeking a 'more serious purifier' beyond standard filters and chlorine dioxide for lightweight backcountry use. This highlights a critical need for an advanced, highly reliable, and compact water purification system specifically engineered to neutralize severe bacterial, viral, and chemical threats in extreme outdoor conditions. Such a product would cater to serious adventurers, expeditions, and disaster preparedness, offering superior protection and peace of mind when water sources are highly suspect.