USGS National Water Information System (NWIS)
The National Water Information System (NWIS) is the U.S. Geological Survey's principal repository of water resources data for the United States, providing access to surface water, groundwater, and water quality data collected at monitoring sites and stream gages nationwide. NWIS is the authoritative source for USGS streamgage monitoring locations and national aquifer information. Geoconnex draws on NWIS as the source of record for its reference stream gage monitoring locations and USGS National Aquifer reference features.
[{"category": "Organization", "contact_details": [{"contact_type": "url", "value": "https://waterdata.usgs.gov/nwis"}], "label": "U.S. Geological Survey (USGS)"}]
[{"category": "GraphicalInterface", "description": "USGS Water Data for the Nation web interface to the National Water Information System, providing access to streamgage monitoring locations, surface water, groundwater, and water quality data.", "format": "http", "id": "usgs-nwis.landing", "name": "USGS Water Data for the Nation (NWIS Web)", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "usgs-nwis"}], "product_url": "https://waterdata.usgs.gov/nwis"}, {"category": "GraphProduct", "description": "The Geoconnex knowledge graph, an open community-contributed RDF graph linking U.S. hydrologic features via persistent identifiers. It integrates USGS reference features (NHDPlus High Resolution hydrologic units, Watershed Boundary Dataset subwatersheds, reference stream gages, and national aquifers) with community-contributed feature registries, and is served through the Geoconnex SPARQL and Triple Pattern Fragments endpoints.", "format": "ttl", "id": "geoconnex.graph", "name": "GEOCONNEX Knowledge Graph", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "geoconnex"}, {"relation_type": "prov:hadPrimarySource", "source": "usgs-nhd"}, {"relation_type": "prov:hadPrimarySource", "source": "usgs-nwis"}], "product_url": "https://github.com/internetofwater/geoconnex.us", "secondary_source": [{"relation_type": "prov:wasInfluencedBy", "source": "epa-sdwis"}, {"relation_type": "prov:wasInfluencedBy", "source": "us-census"}]}]
{"activity_status": "active", "category": "DataSource", "contacts": [{"category": "Organization", "contact_details": [{"contact_type": "url", "value": "https://waterdata.usgs.gov/nwis"}], "label": "U.S. Geological Survey (USGS)"}], "creation_date": "2026-07-02T00:00:00Z", "description": "The National Water Information System (NWIS) is the U.S. Geological Survey's principal repository of water resources data for the United States, providing access to surface water, groundwater, and water quality data collected at monitoring sites and stream gages nationwide. NWIS is the authoritative source for USGS streamgage monitoring locations and national aquifer information. Geoconnex draws on NWIS as the source of record for its reference stream gage monitoring locations and USGS National Aquifer reference features.", "domains": ["environment", "general"], "homepage_url": "https://waterdata.usgs.gov/nwis", "id": "usgs-nwis", "last_modified_date": "2026-07-02T00:00:00Z", "layout": "resource_detail", "license": {"id": "", "label": "U.S. federal government public domain"}, "name": "USGS National Water Information System (NWIS)", "products": [{"category": "GraphicalInterface", "description": "USGS Water Data for the Nation web interface to the National Water Information System, providing access to streamgage monitoring locations, surface water, groundwater, and water quality data.", "format": "http", "id": "usgs-nwis.landing", "name": "USGS Water Data for the Nation (NWIS Web)", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "usgs-nwis"}], "product_url": "https://waterdata.usgs.gov/nwis"}, {"category": "GraphProduct", "description": "The Geoconnex knowledge graph, an open community-contributed RDF graph linking U.S. hydrologic features via persistent identifiers. It integrates USGS reference features (NHDPlus High Resolution hydrologic units, Watershed Boundary Dataset subwatersheds, reference stream gages, and national aquifers) with community-contributed feature registries, and is served through the Geoconnex SPARQL and Triple Pattern Fragments endpoints.", "format": "ttl", "id": "geoconnex.graph", "name": "GEOCONNEX Knowledge Graph", "original_source": [{"relation_type": "prov:hadPrimarySource", "source": "geoconnex"}, {"relation_type": "prov:hadPrimarySource", "source": "usgs-nhd"}, {"relation_type": "prov:hadPrimarySource", "source": "usgs-nwis"}], "product_url": "https://github.com/internetofwater/geoconnex.us", "secondary_source": [{"relation_type": "prov:wasInfluencedBy", "source": "epa-sdwis"}, {"relation_type": "prov:wasInfluencedBy", "source": "us-census"}]}]}