USGS Water Data OGC API

The USGS Water Data OGC API — a conformant OGC API - Features implementation over the national water observation network, exposing 36 collections (monitoring locations, continuous and daily values, field and channel measurements, peaks, time-series metadata, and the full USGS reference-code vocabulary) as GeoJSON with CQL2 filtering. Verified anonymously on 2026-08-20: the landing page, /conformance and /collections each returned HTTP 200, and the first-party OpenAPI 3.0.2 (184 paths, 220 operations, "USGS Water Data APIs" v0.71.7) is served live and without a key at /openapi?f=json. The conformance declaration names 18 classes across OGC API - Common parts 1-3, OGC API - Features parts 1-4, and CQL2. This replaces an earlier catalog entry that described these OGC operations but pointed at earthquake.usgs.gov/fdsnws/event/1, where /collections soft-404s to an HTML documentation page.

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OpenAPI Specification

u-s-geological-survey-water-data-ogc-api-openapi.yml Raw ↑
components:
  parameters:
    bbox:
      description: Only features that have a geometry that intersects the bounding box are selected.The bounding box is provided
        as four or six numbers, depending on whether the coordinate reference system includes a vertical axis (height or depth).
      explode: false
      in: query
      name: bbox
      required: false
      schema:
        items:
          type: number
        maxItems: 6
        minItems: 4
        type: array
      style: form
    bbox-crs:
      description: Indicates the coordinate reference system for the given bbox coordinates.
      explode: false
      in: query
      name: bbox-crs
      required: false
      schema:
        format: uri
        type: string
      style: form
    bbox-crs-epsg:
      description: Indicates the EPSG for the given bbox coordinates.
      explode: false
      in: query
      name: bbox-crs
      required: false
      schema:
        default: 4326
        type: integer
      style: form
    crs:
      description: Indicates the coordinate reference system for the results.
      explode: false
      in: query
      name: crs
      required: false
      schema:
        format: uri
        type: string
      style: form
    f:
      description: The optional f parameter indicates the output format which the server shall provide as part of the response
        document.  The default format is GeoJSON.  CSV is also available.
      explode: false
      in: query
      name: f
      required: false
      schema:
        default: json
        enum:
        - json
        - html
        - jsonld
        - csv
        type: string
      style: form
    filter:
      description: "CQL Text filter expression.  CQL JSON cannot be used here, only in the body. \nSee also: https://docs.pygeoapi.io/en/latest/cql.html\
        \ \n\nExample: time_series_id IN ('64ee32f5350a4ec4967435dcd2e364ea', '3e55d9c2d8a54bec9ca5e292b07d5a96')"
      in: query
      name: filter
      required: false
      schema:
        type: string
    filter-lang:
      description: CQL language used (e.g., cql-text, cql-json)
      in: query
      name: filter-lang
      required: false
      schema:
        enum:
        - cql-text
        - cql-json
        type: string
    lang:
      description: The optional lang parameter instructs the server return a response in a certain language, if supported.  If
        the language is not among the available values, the Accept-Language header language will be used if it is supported.
        If the header is missing, the default server language is used. Note that providers may only support a single language
        (or often no language at all), that can be different from the server language.  Language strings can be written in
        a complex (e.g. "fr-CA,fr;q=0.9,en-US;q=0.8,en;q=0.7"), simple (e.g. "de") or locale-like (e.g. "de-CH" or "fr_BE")
        fashion.
      in: query
      name: lang
      required: false
      schema:
        default: en-US
        enum:
        - en-US
        type: string
    limit:
      description: The optional limit parameter limits the number of items that are presented in the response document
      explode: false
      in: query
      name: limit
      required: false
      schema:
        default: 100
        maximum: 10000
        minimum: 1
        type: integer
      style: form
    offset:
      description: The optional offset parameter indicates the index within the result set from which the server shall begin
        presenting results in the response document.  The first element has an index of 0 (default).
      explode: false
      in: query
      name: offset
      required: false
      schema:
        default: 0
        minimum: 0
        type: integer
      style: form
    properties:
      description: The properties that should be included. The parameter value is a comma-separated list of property names.
      explode: false
      in: query
      name: properties
      required: false
      schema:
        items:
          type: string
        type: array
      style: form
    q:
      description: "Full-text search across the most relevant text fields for this collection (e.g. site name, identifier,\
        \ number, state, county, and site type).\n\nMatching rules:\n\n  - Case-insensitive, with prefix matching (e.g. `poud`\
        \ matches `POUDRE`).\n  - Words separated by spaces are AND'd together (all must match).\n  - Terms separated by commas\
        \ are OR'd together (any may match).\n  - Common abbreviations are expanded, so `river` also matches sites stored\
        \ as `RV` (and vice versa).\n\nResults are ordered by relevance when `q` is supplied without an explicit `sortby`.\n\
        \nExamples:\n\n  - `q=poudre` — sites whose name/identifier starts with or contains `poudre`\n  - `q=colorado river`\
        \ — sites matching both `colorado` and `river`/`rv`\n  - `q=poudre,cache creek` — sites matching `poudre` OR (`cache`\
        \ AND `creek`/`ck`)"
      explode: false
      in: query
      name: q
      required: false
      schema:
        minLength: 2
        type: string
      style: form
    resourceId:
      description: Configuration resource identifier
      in: path
      name: resourceId
      required: true
      schema:
        default: latest-continuous
        type: string
    skipGeometry:
      description: This option can be used to skip response geometries for each feature.
      explode: false
      in: query
      name: skipGeometry
      required: false
      schema:
        default: false
        type: boolean
      style: form
    statistic_id:
      description: A code corresponding to the statistic an observation represents. Example codes include 00001 (max), 00002
        (min), and 00003 (mean). A complete list of codes and their descriptions can be found at [https://help.waterdata.usgs.gov/code/stat_cd_nm_query?stat_nm_cd=%25&fmt=html](https://help.waterdata.usgs.gov/code/stat_cd_nm_query?stat_nm_cd=%25&fmt=html).
      explode: false
      in: query
      name: statistic_id
      required: false
      schema:
        description: A code corresponding to the statistic an observation represents. Example codes include 00001 (max), 00002
          (min), and 00003 (mean). A complete list of codes and their descriptions can be found at [https://help.waterdata.usgs.gov/code/stat_cd_nm_query?stat_nm_cd=%25&fmt=html](https://help.waterdata.usgs.gov/code/stat_cd_nm_query?stat_nm_cd=%25&fmt=html).
        title: Statistic ID
        type: string
      style: form
    time:
      description: "The date an observation represents. You can query this field using date-times or intervals, adhering to\
        \ RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start or\
        \ end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\
        \n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects: \"\
        P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `time` that intersects\
        \ the value of datetime are selected. If a feature has multiple temporal properties, it is the decision of the server\
        \ whether only a single temporal property is used to determine the extent or all relevant temporal properties.\n"
      explode: false
      in: query
      name: time
      required: false
      schema:
        description: "The date an observation represents. You can query this field using date-times or intervals, adhering\
          \ to RFC 3339, or using ISO 8601 duration objects. Intervals may be bounded or half-bounded (double-dots at start\
          \ or end).\nExamples:\n\n  - A date-time: \"2018-02-12T23:20:50Z\"\n  - A bounded interval: \"2018-02-12T00:00:00Z/2018-03-18T12:31:12Z\"\
          \n  - Half-bounded intervals: \"2018-02-12T00:00:00Z/..\" or \"../2018-03-18T12:31:12Z\"\n  - Duration objects:\
          \ \"P1M\" for data from the past month or \"PT36H\" for the last 36 hours\n\nOnly features that have a `time` that\
          \ intersects the value of datetime are selected. If a feature has multiple temporal properties, it is the decision\
          \ of the server whether only a single temporal property is used to determine the extent or all relevant temporal\
          \ properties.\n"
        title: Time
        type: string
      style: form
    vendorSpecificParameters:
      description: Additional "free-form" parameters that are not explicitly defined
      in: query
      name: vendorSpecificParameters
      schema:
        additionalProperties: true
        type: object
      style: form
    wda_sortby:
      description: "Specifies a comma-separated list of property names by which the response shall be sorted.  If the property\
        \ name is preceded by a plus (+) sign it indicates an ascending sort for that property.  If the property name is preceded\
        \ by a minus (-) sign it indicates a descending sort for that property.  If the property is not preceded by a plus\
        \ or minus, then the default sort order implied is ascending (+).  \n\nOnly a single page of data can be returned\
        \ when specifying sortby. If you need more than a single page of data, don't specify a sortby value and sort the full\
        \ data set after it's been downloaded."
      explode: false
      in: query
      name: sortby
      required: false
      schema:
        items:
          pattern: '[+|-]?[A-Za-z_].*'
          type: string
        minItems: 1
        type: array
      style: form
  responses:
    '200':
      description: successful operation
    '204':
      description: no content
    AgencyCodesFeature:
      content:
        application/geo+json:
          example:
            geometry: null
            id: AK001
            properties:
              agency_name: Alaska Department of Transportation and Public Facilities
              id: AK001
            type: Feature
          schema:
            $ref: '#/components/schemas/AgencyCodesFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Agency codes.
    AgencyCodesFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry: null
              id: AK001
              properties:
                agency_name: Alaska Department of Transportation and Public Facilities
                id: AK001
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/agency-codes/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/AgencyCodesFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Agency codes.
    AltitudeDatumsFeature:
      content:
        application/geo+json:
          example:
            geometry: null
            id: NAVD88
            properties:
              altitude_datum_description: North American Vertical Datum of 1988
              id: NAVD88
            type: Feature
          schema:
            $ref: '#/components/schemas/AltitudeDatumsFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Altitude datums.
    AltitudeDatumsFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry: null
              id: NAVD88
              properties:
                altitude_datum_description: North American Vertical Datum of 1988
                id: NAVD88
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/altitude-datums/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/AltitudeDatumsFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Altitude datums.
    AquiferCodesFeature:
      content:
        application/geo+json:
          example:
            geometry: null
            id: 000AARF
            properties:
              aquifer_name: Amphibolite and Amphibolite Rich Foliats
              id: 000AARF
            type: Feature
          schema:
            $ref: '#/components/schemas/AquiferCodesFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Aquifer codes.
    AquiferCodesFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry: null
              id: 000AARF
              properties:
                aquifer_name: Amphibolite and Amphibolite Rich Foliats
                id: 000AARF
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-codes/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/AquiferCodesFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Aquifer codes.
    AquiferTypesFeature:
      content:
        application/geo+json:
          example:
            geometry: null
            id: U
            properties:
              aquifer_type_description: Unconfined single aquifer
              id: U
            type: Feature
          schema:
            $ref: '#/components/schemas/AquiferTypesFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Aquifer types.
    AquiferTypesFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry: null
              id: U
              properties:
                aquifer_type_description: Unconfined single aquifer
                id: U
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/aquifer-types/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/AquiferTypesFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Aquifer types.
    ChannelMeasurementsFeature:
      content:
        application/geo+json:
          example:
            geometry:
              coordinates:
              - -88.01
              - 44.5286111111111
              type: Point
            id: 6b0fefaa-5f8a-41a6-b590-7b31f2f4eb03
            properties:
              channel_area: example-value
              channel_area_unit: example-value
              channel_evenness: example-value
              channel_flow: example-value
              channel_flow_unit: example-value
              channel_location_direction: example-value
              channel_location_distance: example-value
              channel_location_distance_unit: example-value
              channel_material: example-value
              channel_measurement_type: example-value
              channel_name: example-value
              channel_stability: example-value
              channel_velocity: example-value
              channel_velocity_unit: example-value
              channel_width: example-value
              channel_width_unit: example-value
              field_visit_id: 00000000-0000-0000-0000-000000000002
              horizontal_velocity_description: example-value
              id: 6b0fefaa-5f8a-41a6-b590-7b31f2f4eb03
              last_modified: '2025-06-16T14:13:28+00:00'
              longitudinal_velocity_description: example-value
              measurement_number: example-value
              measurement_type: example-value
              monitoring_location_id: USGS-09380000
              time: '2024-06-15T14:00:00+00:00'
              vertical_velocity_description: example-value
            type: Feature
          schema:
            $ref: '#/components/schemas/ChannelMeasurementsFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Channel measurements.
    ChannelMeasurementsFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry:
                coordinates:
                - -88.01
                - 44.5286111111111
                type: Point
              id: 6b0fefaa-5f8a-41a6-b590-7b31f2f4eb03
              properties:
                channel_area: example-value
                channel_area_unit: example-value
                channel_evenness: example-value
                channel_flow: example-value
                channel_flow_unit: example-value
                channel_location_direction: example-value
                channel_location_distance: example-value
                channel_location_distance_unit: example-value
                channel_material: example-value
                channel_measurement_type: example-value
                channel_name: example-value
                channel_stability: example-value
                channel_velocity: example-value
                channel_velocity_unit: example-value
                channel_width: example-value
                channel_width_unit: example-value
                field_visit_id: 00000000-0000-0000-0000-000000000002
                horizontal_velocity_description: example-value
                id: 6b0fefaa-5f8a-41a6-b590-7b31f2f4eb03
                last_modified: '2025-06-16T14:13:28+00:00'
                longitudinal_velocity_description: example-value
                measurement_number: example-value
                measurement_type: example-value
                monitoring_location_id: USGS-09380000
                time: '2024-06-15T14:00:00+00:00'
                vertical_velocity_description: example-value
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/channel-measurements/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberMatched: 1
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/ChannelMeasurementsFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Channel measurements.
    CitationsFeature:
      content:
        application/geo+json:
          example:
            geometry: null
            id: ALSC SOPs, 2015
            properties:
              citation_description: 'Adirondack Lakes Survey Corporation, 2015, Standard operating procedures, laboratory,
                as of December 1, 2015: Ray Brook, New York, Adirondack Lakes Survey Corporation, 72 p.'
              id: ALSC SOPs, 2015
            type: Feature
          schema:
            $ref: '#/components/schemas/CitationsFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Citations.
    CitationsFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry: null
              id: ALSC SOPs, 2015
              properties:
                citation_description: 'Adirondack Lakes Survey Corporation, 2015, Standard operating procedures, laboratory,
                  as of December 1, 2015: Ray Brook, New York, Adirondack Lakes Survey Corporation, 72 p.'
                id: ALSC SOPs, 2015
              type: Feature
            links:
            - href: https://api.waterdata.usgs.gov/ogcapi/v0/collections/citations/items
              rel: self
              title: This document as GeoJSON
              type: application/geo+json
            numberReturned: 1
            timeStamp: '2024-07-21T12:00:00Z'
            type: FeatureCollection
          schema:
            $ref: '#/components/schemas/CitationsFeatureCollection'
        text/html:
          schema:
            type: string
      description: A feature collection of Citations.
    CombinedMetadataFeature:
      content:
        application/geo+json:
          example:
            geometry:
              coordinates:
              - -88.01
              - 44.5286111111111
              type: Point
            id: example-value
            properties:
              agency_code: USGS
              agency_name: U.S. Geological Survey
              altitude: '930.63'
              altitude_accuracy: '0.16'
              altitude_method_code: X
              altitude_method_name: GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
              aquifer_code: 300GRNT
              aquifer_type_code: U
              basin_code: '01'
              begin: '2007-10-01T06:00:00+00:00'
              computation_identifier: Mean
              construction_date: '19630101'
              contributing_drainage_area: '1338'
              country_code: US
              country_name: United States of America
              county_code: '005'
              county_name: Coconino County
              data_gap_interval: P1D
              data_type: example-value
              depth_source_code: D
              district_code: '04'
              drainage_area: '1338'
              end: '2026-06-21T05:00:00+00:00'
              hole_constructed_depth: '160'
              horizontal_position_method_code: N
              horizontal_position_method_name: Interpolated from digital map
              horizontal_positional_accuracy: Accurate to + or - 1 sec.
              horizontal_positional_accuracy_code: S
              hydrologic_unit_code: '15010001'
              id: example-value
              last_modified: '2025-06-16T14:13:28+00:00'
              minor_civil_division_code: '01465'
              monitoring_location_id: USGS-09380000
              monitoring_location_name: Colorado River at Lees Ferry, AZ
              monitoring_location_number: 09380000
              national_aquifer_code: N100CMBRINM
              original_horizontal_datum: NAD83
              original_horizontal_datum_name: North American Datum of 1983
              parameter_code: '00060'
              parameter_description: Discharge, cubic feet per second
              parameter_name: Discharge, ft3/s
              parent_time_series_id: 786d481eaa73420da68a5a08a4302e76
              primary: Primary
              reading_type: ReferencePrimary
              site_type: Stream
              site_type_code: ST
              state_code: '04'
              state_name: Arizona
              statistic_id: '00003'
              sublocation_identifier: Downstream
              thresholds: []
              time_zone_abbreviation: MST
              unit_of_measure: ft3/s
              uses_daylight_savings: Y
              vertical_datum: NAVD88
              vertical_datum_name: North American Vertical Datum of 1988
              web_description: Discharge, cubic feet per second, from river/stream
              well_constructed_depth: '150'
            type: Feature
          schema:
            $ref: '#/components/schemas/CombinedMetadataFeature'
        text/html:
          schema:
            type: string
      description: A single feature from Combined metadata.
    CombinedMetadataFeatures:
      content:
        application/geo+json:
          example:
            features:
            - geometry:
                coordinates:
                - -88.01
                - 44.5286111111111
                type: Point
              id: example-value
              properties:
                agency_code: USGS
                agency_name: U.S. Geological Survey
                altitude: '930.63'
                altitude_accuracy: '0.16'
                altitude_method_code: X
                altitude_method_name: GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
                aquifer_code: 300GRNT
                aquifer_type_code: U
                basin_code: '01'
                begin: '2007-10-01T06:00:00+00:00'
                computation_identifier: Mean
                construction_date: '19630101'
                contributing_drainage_area: '1338'
                country_code: US
                country_name: United States of America
                county_code: '005'
                county_name: Coconino County
                data_gap_interval: P1D
                data_type: example-value
                depth_source_code: D
                district_code: '04'
                drainage_area: '1338'
                end: '2026-06-21T05:00:00+00:00'
                hole_constructed_depth: '160'
                horizontal_position_method_code: N
                horizontal_position_method_name: Interpolated from digital map
                horizontal_positional_accuracy: Accurate to + or - 1 sec.
                horizontal_positional_accuracy_code: S
                hydrologic_unit_code: '15010001'
                id: example-value
                last_modified: '2025-06-16T14:13:28+00:00'
                minor_civil_division_code: '01465'
                monitoring_location_id: USGS-09380000
                monitoring_location_name: Colorado River at Lees Ferry, AZ
                monitoring_location_number: 09380000
                national_aquifer_code: N100CMBRINM
                original_horizontal_datum: NAD83
                original_horizontal_datum_name: North American Datum of 1983
                parameter_code: '00060'
                parameter_description: Discharge, cubic feet per second
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