A facility where water is treated prior to use for consumption or other purpose. Water-supply treatment plant Adapted from USGS Site Types. Facility Sites http://wdr.water.usgs.gov/nwisgmap/help/sitetype.html A vocabulary for describing the type of a data collection Site. To some extent, these types represent the ultimate feature of interest that the site was established to measure. For example, a Stream Site was established to measure properties of a Stream. ODM2 SiteType Controlled Vocabulary ODM2 Working Group