According to the Safe Drinking Water Act, what is the minimum number of water supply sources determined by?

The minimum number of water supply sources under the Safe Drinking Water Act is determined by the population served. This regulation ensures that communities have sufficient and reliable access to safe drinking water, taking into account the number of residents who rely on the water supply. Establishing a minimum number of sources helps to manage risk and maintain service, especially during emergencies or maintenance activities. By focusing on the population served, the regulatory framework aims to provide protective measures that safeguard public health through the availability of multiple sources, reducing dependency on a single source that could be compromised. This approach aligns with public health principles, ensuring resilience in the water supply system.