# U.S. Geological Survey National Aquifer Codes API

**Canonical:** https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-national-aquifer-codes-api/  
**Provider:** U.S. Geological Survey — https://apis.io/providers/u-s-geological-survey/  
**Base URL:** https://earthquake.usgs.gov/fdsnws/event/1  
**Documentation:** https://www.usgs.gov/tools/asset-identifier-service-ais

U.S. Geological Survey National Aquifer Codes API is one of 47 APIs that [U.S. Geological Survey](https://apis.io/providers/u-s-geological-survey/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 3 JSON Schema definitions. Tagged areas include national-aquifer-codes. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, a JSON-LD context, authentication docs, and 3 JSON Schemas.

National aquifers are the principal aquifers or aquifer systems in the United States, defined as regionally extensive aquifers or aquifer systems that have the potential to be used as a source of potable water.

## Operations (8)

| Method | Path | Summary |
|---|---|---|
| GET | `/collections/national-aquifer-codes` | Get National aquifer codes metadata |
| GET | `/collections/national-aquifer-codes/items` | Get National aquifer codes items |
| OPTIONS | `/collections/national-aquifer-codes/items` | Options for National aquifer codes items |
| POST | `/collections/national-aquifer-codes/items` | Get National aquifer codes items with CQL2 |
| GET | `/collections/national-aquifer-codes/items/{featureId}` | Get National aquifer codes item by id |
| OPTIONS | `/collections/national-aquifer-codes/items/{featureId}` | Options for National aquifer codes item by id |
| GET | `/collections/national-aquifer-codes/queryables` | Get National aquifer codes queryables |
| GET | `/collections/national-aquifer-codes/schema` | Get National aquifer codes schema |

## Machine-readable artifacts (13)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/openapi/u-s-geological-survey-national-aquifer-codes-api-openapi.yml
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/conformance/u-s-geological-survey-conformance.yml
- **Documentation** — https://earthquake.usgs.gov/fdsnws/event/1/
- **GettingStarted** — https://earthquake.usgs.gov/earthquakes/feed/
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-earthquake-api-earthquake-properties-schema.json
- **JSONLD** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-earthquake-api-context.jsonld
- **Examples** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-earthquake-api-earthquake-properties-example.json
- **Documentation** — https://api.waterdata.usgs.gov/docs/
- **Authentication** — https://api.waterdata.usgs.gov/signup/
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-monitoring-location-properties-schema.json
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-schema/usgs-water-data-api-time-series-properties-schema.json
- **JSONLD** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/json-ld/usgs-water-data-api-context.jsonld
- **Examples** — https://raw.githubusercontent.com/api-evangelist/u-s-geological-survey/refs/heads/main/examples/usgs-water-data-api-monitoring-location-properties-example.json

## Other U.S. Geological Survey APIs (12)

- [USGS Water Data APIs](https://apis.io/apis/u-s-geological-survey/water-data-ogc-api/)
- [Asset Identifier Service (AIS)](https://apis.io/apis/u-s-geological-survey/asset-identifier-service-ais/)
- [Seismic Design Web Service](https://apis.io/apis/u-s-geological-survey/seismic-design-web-service/)
- [ScienceBase](https://apis.io/apis/u-s-geological-survey/sciencebase/)
- [StreamStats Web Services](https://apis.io/apis/u-s-geological-survey/streamstats-web-services/)
- [USGS Water Services (Legacy)](https://apis.io/apis/u-s-geological-survey/usgs-water-services/)
- [U.S. Geological Survey Catalog API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-catalog-api/)
- [U.S. Geological Survey Earthquakes API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-earthquakes-api/)
- [U.S. Geological Survey Monitoring Locations API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-monitoring-locations-api/)
- [U.S. Geological Survey Reference Data API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-reference-data-api/)
- [U.S. Geological Survey Time Series Data API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-time-series-data-api/)
- [U.S. Geological Survey Agency Codes API](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-agency-codes-api/)

## Tags

national-aquifer-codes

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/u-s-geological-survey/u-s-geological-survey-national-aquifer-codes-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/u-s-geological-survey/.