USGS Water Services - Free Environment API (No Auth Required)

Overview

US water quality and availability data

Notes: Free US water data API.

TL;DR

What it does: USGS Water Services: US water quality and availability data.

Quick start: https://waterservices.usgs.gov/nwis/iv/?format=json&sites=02319000

No API key needed!

Try It Now

Call this URL to see what you get back:

https://waterservices.usgs.gov/nwis/iv/?format=json&sites=02319000

Try This URL Now →

FAQ

Do I need an API key?: No! This API is completely free to use with no authentication required.
Is there a rate limit?: Most free APIs have generous limits. Check documentation for specifics.
Can I use this in a commercial project?: Yes, these APIs are free for both personal and commercial use. Check the documentation for any specific restrictions.
How do I get started?: Copy the example URL above and paste it into your browser or code. The response is in JSON format which you can parse in any programming language.

Code Examples

JavaScript Example

fetch('https://waterservices.usgs.gov/nwis/iv/?format=json&sites=02319000')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Python Example

import requests

url = 'https://waterservices.usgs.gov/nwis/iv/?format=json&sites=02319000'
response = requests.get(url)
data = response.json()
print(data)

API Details

API URL: https://waterservices.usgs.gov/
Documentation: https://waterservices.usgs.gov/
Category: Environment
Authentication: Not Required
Geographic Coverage: US

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