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Water Quality Vertical Profiles in Clear Lake, Lake County, California, 2017-2019 (ver. 3.0, January 2022) (Under Revision) Note: This data release is currently being revised and is temporarily unavailable. Field data for vertical water quality profiles using Yellow Spring Instruments (YSI) EXO2 sondes during daylight hours in Clear Lake, California. This data release includes all measured environmental parameters included in the analysis. First release: April 13, 2019 Revised: October 29, 2019 (ver. 2.0) Revised - January 24, 2022 (version 3.0) Categories: Data, Data Release - Revised, Data Release - Under Revision; Tags: California, Clear Lake, Lake County, USGS Science Data Catalog (SDC), United States, All tags... Vertical Profile, Water Quality, Water Quality, biota, environment, inlandWaters, Fewer tags Community public supply based Hydrogeologic Mapping Units A seamless map of the major groundwater areas used by community public supply wells in the United States was needed in order to describe and compute the number of equivalent people using public supply water. This goal was met by the delineation of hydrogeologic mapping units (HMUs). An HMU is a mapped polygon, within which, all public supply wells have a common source of water. The source of water can be either a national Principal Aquifer (PA) as defined in USGS (2003) or a Secondary Hydrogeologic Region (SHR) as defined in Belitz et al. (2018). Collectively, both PAs and SHRs are referred to as Hydrogeologic Regions (HRs). The common source of water can be a single HR or multiple HRs, as HRs can overlap one another.... Categories: Data, Data Release - Under Revision; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: United States, geoscientificInformation, groundwater, hydrogeology