State law requires making free potable water available during meals.
California Education Code 38086 Establishment and Use
(a) Except as provided in subdivision (b), by July 1, 2011, a school district shall provide access to free, fresh drinking water during meal times in the food service areas of the schools under its jurisdiction, including, but not necessarily limited to, areas where reimbursable meals under the National School Lunch Program or the federal School Breakfast Program are served or consumed. A school district may comply with this section by, among other means, providing cups and containers of water or soliciting or receiving donated bottled water.
Drinking Water for Students in Schools
This site addresses providing free water to students during meals.
Local School Wellness Policy
This document addresses providing free water to students during meal times.