Relating to boil water notices issued by public drinking water supply systems.

This bill requires public drinking water systems in Texas to issue a boil water notice within 12 hours if they discover a violation that could seriously harm health or a situation posing significant health risks from their water. If the issue isn't resolved within 72 hours, the water system must reissue the notice with details on how they're addressing the problem. The law specifies that notices can be delivered through any communication method meeting federal Safe Drinking Water Act requirements. It directly affects water system operators (who must issue notices) and residents (who receive the notices).