The US conducts war crimes in Iran by bombing civilian water facilities. Protocol I (Article 54) and Protocol II (Article 15) of the Geneva Conventions prohibit attacking, destroying, or rendering useless objects indispensable to civilian survival, such as drinking water installations, dams, and dykes.
https://www.aljazeera.com/news/2026/6/10/us-bombs-irans-water-facilities-why-thats-so-significant
https://www.genocidewatch.com/single-post/destroying-iran-s-electric-and-water-supply-is-a-war-crime