In a warming and drying California, water agencies across the state are looking for new water sources and trying to better utilize the ones they have. Pacifica has a potential source of water not available to many communities: the drippy gray moisture that blows ashore in the form of fog. Fog is composed of tiny water droplets; together, a cubic mile of fog can carry some 56,000 gallons of water. The North Coast County Water District … installed experimental fog-catchers over the summer at three district sites … The fog-catching devices are simple: a 1-meter square of polyethylene mesh stretched over a frame and installed facing into the prevailing wind. When the fog blows in, the mesh collects droplets of water like a giant spider web. The drops fall into a collecting trough below and flow through a gauge that measures the amount of water.