{ "culture": "en-US", "name": "GAMA_GIS_Wells", "guid": "1FA58D7A-17EA-43AC-830B-611EE353326F", "catalogPath": "", "snippet": "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.", "description": "
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> <\/p> All groundwater wells on GAMA Groundwater Information System, accessed July 7, 2025. <\/span><\/p> <\/p> Sources of data include (as indicated in GM_DATA_SOURCE field): <\/span><\/p> <\/p> <\/p> 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> <\/p> 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> <\/p> GAMA: Wells sampled by California State Water Resources Control Board staff for the GAMA Program Domestic Well Project. <\/span><\/p> <\/p> DDW: Division of Drinking Water (DDW) wells sampled and regulated for delivered water quality under DDW oversight. <\/span><\/p> <\/p> DPR: Wells sampled by the Department of Pesticide Regulation (DPR) groundwater program. <\/span><\/p> <\/p> WDL: Wells in the Department of Water Resources (DWR) water quality sampling network in their water data library. <\/span><\/p> <\/p> LLNL: Wells sampled for groundwater age, isotopes, or noble gas for the GAMA Program by Lawrence Livermore National Laboratory (LLNL). <\/span><\/p> <\/p> NWIS: Wells sampled by the USGS and accessible via the National Water Information System (NWIS). <\/span><\/p> <\/p> 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> <\/p> 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> <\/p> 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> <\/p> The field, GM_DATASET_NAME can also help explain the source of the dataset. <\/span><\/p> <\/p> Direct any questions to: GAMA@waterboards.ca.gov.<\/span><\/p><\/div><\/div><\/div><\/div>",
"summary": "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.",
"title": "GAMA GIS Wells",
"tags": [
"GAMA",
"SWRCB",
"groundwater",
"water quality"
],
"type": "Feature Service",
"typeKeywords": [
"ArcGIS",
"ArcGIS Server",
"Data",
"Feature Access",
"Feature Service",
"providerSDS",
"Public Data Collection",
"Service"
],
"thumbnail": "thumbnail/thumbnail.png",
"url": "",
"extent": [
[
-124.355466000177,
32.5416409998804
],
[
-114.133384000061,
41.9985000001828
]
],
"minScale": 0,
"maxScale": 1.7976931348623157E308,
"spatialReference": "WGS_1984_Web_Mercator_Auxiliary_Sphere",
"accessInformation": "Created by GAMA Staff from GAMA Groundwater Information System: https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/.",
"licenseInfo": " For public use. For questions, please contact WB.GAMA@waterboards.ca.gov.<\/span><\/p><\/div><\/div><\/div><\/div>",
"portalUrl": ""
}