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All well locations from all datasets standardized on the GAMA Program's Groundwater Information System (GAMA GIS). This is a replacement of previous versions, updated quarterly. Authoritative version. WGS 84. <\/SPAN><\/P>

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All groundwater wells on GAMA Groundwater Information System, accessed July 24, 2024. <\/SPAN><\/P>

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Sources of data include (as indicated in GM_DATA_SOURCE field): <\/SPAN><\/P>

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GeoTracker: Wells sampled under regulated activities like cleanup and remediation. These are accessible through the California State Water Resources Control Board GeoTracker web site. <\/SPAN><\/P>

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USGS: Wells sampled and analyzed by the U.S. Geological Survey (USGS) through the Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project. <\/SPAN><\/P>

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GAMA: Wells sampled by California State Water Resources Control Board staff for the GAMA Program Domestic Well Project. <\/SPAN><\/P>

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DDW: Division of Drinking Water (DDW) wells sampled and regulated for delivered water quality under DDW oversight. <\/SPAN><\/P>

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DPR: Wells sampled by the Department of Pesticide Regulation (DPR) groundwater program. <\/SPAN><\/P>

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WDL: Wells in the Department of Water Resources (DWR) water quality sampling network in their water data library. <\/SPAN><\/P>

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LLNL: Wells sampled for groundwater age, isotopes, or noble gas for the GAMA Program by Lawrence Livermore National Laboratory (LLNL). <\/SPAN><\/P>

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NWIS: Wells sampled by the USGS and accessible via the National Water Information System (NWIS). <\/SPAN><\/P>

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UC Davis: Location of wells gathered from multiple local entities for use in the UC Davis Nitrate Report, under agreement with the GAMA Program. <\/SPAN><\/P>

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LOCALGW: Wells sampled under various local groundwater projects. As of July 30, 2019, this only includes the domestic sampling completed by the Central Coast Regional Water Quality Control Board. <\/SPAN><\/P>

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GAMA_LOCALGW: Wells sampled under local groundwater projects, generally sampled from private wells from various private and governmental organizations. Data was submitted through the GAMA Data Connection Portal. <\/SPAN><\/P>

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The field, GM_DATASET_NAME can also help explain the source of the dataset. <\/SPAN><\/P>

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Direct any questions to: GAMA@waterboards.ca.gov.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "Created by GAMA Staff from the GAMA Groundwater Information System: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/.", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "simple", "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 132, 0, 168, 255 ], "outline": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 110, 110, 110, 255 ], "width": 1 } } }, "scaleSymbols": true, "transparency": 51.724137999999996, "labelingInfo": null }, "defaultVisibility": true, "extent": { "xmin": 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