Ground Water - Water Quality Results
Groundwater quality data and related groundwater well information available on the page was queried from the GAMA Groundwater information system (**[GAMA GIS](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**). Data provided represent a collection of groundwater quality results from various federal, state, and local groundwater sources. Results have been filtered to only represent untreated sampling results for the purpose of characterizing ambient conditions.
Data have been standardized across multiple data sets including chemical names and units. Standardization has not been performed for chemical result modifier and others (although we are working currently to standardize most fields). Chemicals that have been standardized are included in the data sets. Therefore, other chemicals have been analyzed for but are not included in GAMA downloads. Groundwater samples have been collected from well types including domestic, irrigation, monitoring, municipal. Wells that cannot accurately be attributed to a category are labeled as "water supply, other".
For additional information regarding the GAMA GIS data system please reference our **[factsheet](https://www.waterboards.ca.gov/publications_forms/publications/factsheets/docs/gama_gis_factsheet.pdf)**.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| contactPoint |
{
"fn": "Groundwater Ambient Monitoring and Assessment Unit",
"@type": "vcard:Contact",
"hasEmail": "mailto:WB.GAMA@Waterboards.ca.gov"
}
|
| description | <p>Groundwater quality data and related groundwater well information available on the page was queried from the GAMA Groundwater information system (**[GAMA GIS](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**). Data provided represent a collection of groundwater quality results from various federal, state, and local groundwater sources. Results have been filtered to only represent untreated sampling results for the purpose of characterizing ambient conditions. Data have been standardized across multiple data sets including chemical names and units. Standardization has not been performed for chemical result modifier and others (although we are working currently to standardize most fields). Chemicals that have been standardized are included in the data sets. Therefore, other chemicals have been analyzed for but are not included in GAMA downloads. Groundwater samples have been collected from well types including domestic, irrigation, monitoring, municipal. Wells that cannot accurately be attributed to a category are labeled as "water supply, other". For additional information regarding the GAMA GIS data system please reference our **[factsheet](https://www.waterboards.ca.gov/publications_forms/publications/factsheets/docs/gama_gis_factsheet.pdf)**. </p> |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "GAMA GIS Subset for Natural Recharge Study",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=12f45d61-5190-4351-887d-15c38c73ee43&limit=0",
"description": "<p>This file contains groundwater quality data for wells used in the **[Natural Recharge Study](https://gispublic.waterboards.ca.gov/portal/apps/storymaps/stories/101aac57c3514f038eef44587eee8a93)**. This dataset is no longer updated. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/12f45d61-5190-4351-887d-15c38c73ee43/download/recharge_monitoring_data.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Division of Drinking Water (pre 2000)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=22aa537f-b27b-4a6f-b492-c4e51ceddaf2&limit=0",
"description": "This file contains statewide groundwater quality data for all chemicals in the GAMA Division of Drinking Water (DDW) dataset. It contains data from public supply wells. Due to size constraints, the DDW data is split up by date. This file contains DDW data up to 1/1/2000.",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/22aa537f-b27b-4a6f-b492-c4e51ceddaf2/download/ddwpre2000.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Division of Drinking Water (2000-2009)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=3dd8ed4d-1598-49c5-84fb-ba4110c2d05b&limit=0",
"description": "This file contains statewide groundwater quality data for all chemicals in the GAMA Division of Drinking Water (DDW) dataset. It contains data from public supply wells. Due to size constraints, the DDW data is split up by date. This file contains DDW data from 1/1/2000 to 12/31/2009.",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/3dd8ed4d-1598-49c5-84fb-ba4110c2d05b/download/ddw2000-2009.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - USGS NWIS",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=75ff1943-c37a-43c4-bf5f-b80532a88ed8&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the USGS_NWIS dataset. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload.html)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/75ff1943-c37a-43c4-bf5f-b80532a88ed8/download/usgsnwis.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - All Wells (Location data only)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=805e6762-1b82-48d9-b68f-5d79cca06ace&limit=0",
"description": "<p>This file contains statewide locations of wells with water quality data for all datasets. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/805e6762-1b82-48d9-b68f-5d79cca06ace/download/gama_allwells.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Department of Water Resources",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=81b65d03-9b06-44cd-beae-d93f5b2718a0&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the Department of Water Resources dataset. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/81b65d03-9b06-44cd-beae-d93f5b2718a0/download/dwr.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Water Replenishment District (LA County)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=91657757-7c51-48f2-b154-9209b5c0616e&limit=0",
"description": "<p>This file contains groundwater quality data for all chemicals in the Water Replenishment District dataset (Los Angeles County). For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/91657757-7c51-48f2-b154-9209b5c0616e/download/wrd.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - GAMA",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=9e09ac40-b694-4ddc-acd2-2e7f7d10e231&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the GAMA Domestic Wells, GAMA Special Projects, and GAMA USGS datasets. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/9e09ac40-b694-4ddc-acd2-2e7f7d10e231/download/gama.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Department of Pesticide Regulation",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=a0d400c0-fa18-4f2d-adbd-cbe2e552bca2&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the Department of Pesticide Regulation dataset. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/a0d400c0-fa18-4f2d-adbd-cbe2e552bca2/download/dpr.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Division of Drinking Water (2010-2019)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=a34c79c3-698e-4047-ab4f-69efc456906c&limit=0",
"description": "This file contains statewide groundwater quality data for all chemicals in the GAMA Division of Drinking Water (DDW) dataset. It contains data from public supply wells. Due to size constraints, the DDW data is split up by date. This file contains DDW data from 1/1/2010 to 12/31/2019.",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/a34c79c3-698e-4047-ab4f-69efc456906c/download/ddw2010-2019.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - PFAS (Statewide)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=c7cd50a2-2a68-44a1-8d40-4e767f363964&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all PFAS constituents (all datasets included). For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/c7cd50a2-2a68-44a1-8d40-4e767f363964/download/pfas.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Irrigated Lands Regulatory Program",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=c97e1fcf-8ad0-4913-9234-ba682ea73bc4&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the Irrigated Lands Regulatory Program dataset. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/c97e1fcf-8ad0-4913-9234-ba682ea73bc4/download/wbilrp.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Division of Drinking Water (2020 - present)",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=d2e74ace-2cf4-4baf-aadd-406280bf1c1c&limit=0",
"description": "This file contains statewide groundwater quality data for all chemicals in the GAMA Division of Drinking Water (DDW) dataset. It contains data from public supply wells. Due to size constraints, the DDW data is split up by date. This file contains DDW data from 1/1/2020 to present.",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/d2e74ace-2cf4-4baf-aadd-406280bf1c1c/download/ddw2020-present.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA GIS - Effects of Recharge on Groundwater Quality",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=d465ba70-6c0f-493e-84f3-6982bf9c8468&limit=0",
"description": "This file contains groundwater quality data for wells used in the [Aquifer Recharge and Groundwater Quality (ARGQ) Dashboard](https://gispublic.waterboards.ca.gov/portal/apps/experiencebuilder/experience/?id=ca0c0c70a69e481589fed4e7ee345558). The selected wells and water quality data were filtered from GAMA GIS based on a minimum number of 8 results per constituent since 2014 and with the most recent sample from 2024. <br>
For more information about GAMA datasets, please refer to the [dataset description](https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf) file on the [GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload.html).",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/d465ba70-6c0f-493e-84f3-6982bf9c8468/download/gama_recharge_master_sample.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "GAMA - Local Groundwater Projects",
"format": "CSV",
"mediaType": "text/csv",
"describedBy": "https://data.ca.gov/api/action/datastore_search?resource_id=e7b53637-61a1-4c05-a835-63d8392423c3&limit=0",
"description": "<p>This file contains statewide groundwater quality data for all chemicals in the Local Groundwater Projects dataset. For more information about GAMA datasets, please refer to the **[dataset description]( https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Descriptions.pdf)** file on the **[GAMA data download page](https://gamagroundwater.waterboards.ca.gov/gama/datadownload)**.</p>",
"downloadURL": "https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/e7b53637-61a1-4c05-a835-63d8392423c3/download/localgw.csv",
"describedByType": "application/json"
},
{
"@type": "dcat:Distribution",
"title": "Data Dictionary - GAMA - Division of Drinking Water (pre 2000)",
"format": "CSV",
"mediaType": "text/csv",
"description": "Data Dictionary for https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/22aa537f-b27b-4a6f-b492-c4e51ceddaf2/download/ddwpre2000.csv",
"downloadURL": "https://data.ca.gov/datastore/dictionary_download/22aa537f-b27b-4a6f-b492-c4e51ceddaf2",
"isDataDictionary": true
},
{
"@type": "dcat:Distribution",
"title": "Data Dictionary - GAMA - Division of Drinking Water (2000-2009)",
"format": "CSV",
"mediaType": "text/csv",
"description": "Data Dictionary for https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/3dd8ed4d-1598-49c5-84fb-ba4110c2d05b/download/ddw2000-2009.csv",
"downloadURL": "https://data.ca.gov/datastore/dictionary_download/3dd8ed4d-1598-49c5-84fb-ba4110c2d05b",
"isDataDictionary": true
},
{
"@type": "dcat:Distribution",
"title": "Data Dictionary - GAMA - USGS NWIS",
"format": "CSV",
"mediaType": "text/csv",
"description": "Data Dictionary for https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/75ff1943-c37a-43c4-bf5f-b80532a88ed8/download/usgsnwis.csv",
"downloadURL": "https://data.ca.gov/datastore/dictionary_download/75ff1943-c37a-43c4-bf5f-b80532a88ed8",
"isDataDictionary": true
},
{
"@type": "dcat:Distribution",
"title": "Data Dictionary - GAMA - Division of Drinking Water (2010-2019)",
"format": "CSV",
"mediaType": "text/csv",
"description": "Data Dictionary for https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/a34c79c3-698e-4047-ab4f-69efc456906c/download/ddw2010-2019.csv",
"downloadURL": "https://data.ca.gov/datastore/dictionary_download/a34c79c3-698e-4047-ab4f-69efc456906c",
"isDataDictionary": true
},
{
"@type": "dcat:Distribution",
"title": "Data Dictionary - GAMA - Division of Drinking Water (2020 - present)",
"format": "CSV",
"mediaType": "text/csv",
"description": "Data Dictionary for https://data.ca.gov/dataset/81d1347c-891d-4f09-abc5-6eeb521b55d2/resource/d2e74ace-2cf4-4baf-aadd-406280bf1c1c/download/ddw2020-present.csv",
"downloadURL": "https://data.ca.gov/datastore/dictionary_download/d2e74ace-2cf4-4baf-aadd-406280bf1c1c",
"isDataDictionary": true
},
{
"@type": "dcat:Distribution",
"title": "GAMA Data Dictionary",
"format": "excel (xlsx)",
"mediaType": "application/octet-stream",
"description": "Description of field types for GAMA Groundwater Quality Results.",
"downloadURL": "https://gamagroundwater.waterboards.ca.gov/gama/GAMA_Data_Dictionary.xlsx"
}
]
|
| identifier | 81d1347c-891d-4f09-abc5-6eeb521b55d2 |
| issued | 2019-08-10T03:59:27.974358 |
| keyword |
[
"SWRCB",
"Water Supply",
"basin",
"domestic",
"geotracker",
"groundwater",
"priority",
"water",
"well"
]
|
| modified | 2026-01-05T20:33:09.477097 |
| publisher |
{
"name": "California State Water Resources Control Board",
"@type": "org:Organization"
}
|
| title | Ground Water - Water Quality Results |
