This polygon shapefile depicts boundaries for the Health and Sanitation Districts spheres of influence (SOI) in the County of Santa Cruz, California: Santa Cruz, Salsipuedes, Freedom and Davenport. County Service Areas 2, 5, 7, 10, 12, 20 and 54 (unincorporated) are included in this coverage.According to the California Special Districts Association, SanitationDistricts are Special Districts that oversee all aspects of waste management systems, including construction, operation, collection and treatment of garbage. It is governed by an elected Board of Directors. Health and Sanitation Districts were established as revenue source for administration, maintenance and improvement to sanitary sewer facilities in Districts. An SOI is a physical boundary inside of which a local governmental agency is expected to provide services and is generally set by LAFCO with a 20 year time frame. SOI boundaries are designated in order to help discourage urban sprawl, limit boundary disputes between local agencies and provide indications regarding future development potential. A district or city's SOI should not to be construed as "referral" areas or as bestowing authority and control within the SOI boundaries. LAFCO can amend an SOI if there are sound reasons to do so. This layer is part of a collection of GIS data created for Santa Cruz County, California. The Geographic Information Systems (GIS) Unit falls under the purview of the County of Santa Cruz Information Services Department. The GIS Unit serves all County departments and external customers and provides data on land, features and people of Santa Cruz County. Santa Cruz County encompasses 4 cities and approximately 265,000 people. This coverage can be used for basic applications such as viewing, querying and map output production, or to provide a basemap to support graphical overlays and analyses of geospatial data. County of Santa Cruz Information Services Department. (2015). Sanitation Districts Spheres of Influence: Santa Cruz County, California, 2015. Santa Cruz County, California. Available at http://purl.stanford.edu/jn343ny6821. These data were compiled from many different sources; therefore, the accuracy of the individual layers varies significantly, and some layers do not align exactly with others. In the urban areas, data are generally accurate within five to ten feet of their true geographic coordinates, but in the rural areas, data may be accurate to only within three hundred feet. With these limitations, the County of Santa Cruz disclaims any responsibility for the accuracy or correctness of this data. This disclaimer is exclusive and in lieu of any warranties, fitness for particular purpose, and/or any other type of warranty, whether expressed or implied. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.