The City of Grand Prairie has issued a critical advisory for residents north of Interstate 20, urging them to refrain from using tap water due to contamination by a foaming agent, which poses a serious health risk that cannot be mitigated by boiling or filtering. Residents have been instructed to use bottled water for all consumption and hygiene, with distribution points established at Lone Star Park and City Hall. In response to the contamination, Grand Prairie Independent School District closed all schools and canceled extracurricular activities for Wednesday, planning to resume normal operations on Thursday. The city is actively investigating the source of the contamination and cleaning the water supply system. Affected residents can find updates on the city's website or by calling their hotline. The contamination was first detected on September 3, and crews continue to test water samples to ensure safety.