Water availability is affected by water quantity, quality, and flow

The conditions that impact water availability often occur together, including water quantity, quality, and natural flows. For example, areas with limited water supply can be more vulnerable to water quality issues or flow alterations. These maps show four conditions that affect water availability. The darker regions indicate more severe impacts from that particular aspect of water availability.

Image from: https://water.usgs.gov/vizlab/water-availability/