Ozone is among the measures deployed by Östersund municipality in northern Sweden to try kill off the parasite (Cryptosporidium) which has afflicted the stomachs of thousands of residents and rendered the water undrinkable. More than 5,000 residents have taken ill after ingesting water from the city’s water supply, many suffering from diarrhea, vomiting, and severe stomach cramps.
Ozone is one of the few biocides proven to remove cryptosporidium from water at reasonable dosage levels. It also treats a wide range of other pathogens in water as part of a complete water disinfection process.