Summary (in simple terms)

• Jains drink boiled water mainly to minimize harm to tiny living beings (microorganisms) in the water. Boiling is seen as reducing violence (ahimsa) to those jiva in the water.
• After boiling, the water is usually filtered and then cooled before drinking.
• Monks and nuns typically drink boiled water every day; many strict lay followers also boil during special vows or seasons (e.g., certain vrats). Drinking boiled water is less common in casual everyday practice for all households, but it is emphasized in orthodox Jain discipline. Some rules also say water should be drunk before sunset and not at night, to avoid unseen life in water. These practices come from traditional Jain guidelines and interpretations of ahimsa. (Sources discuss these norms in general; practice can vary by community and tradition.) ( jainworld.jainworld.com, voices.uchicago.edu)

Notes on tradition differences

• There are variations between Digambar and Shwetambar communities regarding exact details and who should drink boiled water, but both groups uphold ahimsa as the core reason for this practice. Monks and nuns are generally stricter about boiled water, while lay followers may follow boiled-water norms especially during vows or periods of heightened discipline. ( jainworld.jainworld.com)

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