Snowbird108 wrote an answer about Katadyn Base Camp Water Filter on October 24, 2010
In India, water is often treated with lime... This precipitates out with boiling but not with filtering alone. For maximum safety in India and surrounding areas, depending on your location, filter your water first, followed by boiling and cooling to near room temp, followed by a filtration through a bandana to remove the precipitate. When an Indian tells me that the water isn't safe without the extra steps, I listen. Consequently, even though it was a pain, I followed through every single morning and night. No illnesses or stomach upsets ensued. I traveled throughout North and South India continuously for 5 months without illness or mishap.