According to Robert F. Kennedy Human Rights and the Haitian Bridge Alliance, during the September 2021 mass migration event in Del Rio, Texas, CBP provided “extremely limited access to food and water. “In the initial days of the crisis, CBP personnel arranged a minimal number of service stations in the encampment and began providing a small bread roll and one bottle of water per person, per day. Individuals were required to wait in line, often for over an hour.”
As U.S. officials began handing out food and water, one Haitian man waited in line with hundreds of others to receive a bottle of water and a piece of bread. As he waited for food, he observed that the rations were not enough to sustain him and his family. He also saw how officials distributing the food taunted the asylum seekers by throwing water bottles at them. He described the experience:
“It was humiliating. It felt like at home how you would throw food for chickens on the floor. That’s how they treated us. It felt like they did enough so we wouldn’t die but no more than that. It felt like a nightmare.” 
The RFK-HBA report finds that the lack of access to clean water forced many Haitians in Del Rio to drink from the Rio Grande, which is not potable, sickening many.
—Beyond the Bridge: Documented Human Rights Abuses and Civil Rights Violations Against Haitian Migrants in the Del Rio, Texas Encampment (United States: Robert F. Kennedy Human Rights and Haitian Bridge Alliance, March 29, 2022) https://rfkhr.imgix.net/asset/Del-Rio-Report.pdf.
Footnote from above:
: Haitian Bridge Alliance v. Biden, No. 1:21-CV-03317 (D.D.C.) (filed Dec. 20, 2021), https://i com/data/documenttools/hba-v-biden/a8106eacd7c45afe/full.pdf.