Attribution

activeweather sources data from public-domain providers. Here's how to give proper credit.

Data sources

Requirements

Both NWS and AirNow data are in the public domain and do not require a specific license notice. However, as a condition of using the activeweather API, you must:

1. Display the sources array — Each API response includes a sources array. Display the source names visibly near the data. A small footer line like "Data from NWS" is sufficient.
2. Link to the source — Where possible, make the source name a hyperlink to the URL provided in the sources array.

Example attribution

A minimal attribution line for forecast data:

<footer>
  Data from <a href="https://www.weather.gov">NWS</a>
</footer>

For air quality data:

<footer>
  Air quality data from <a href="https://www.airnow.gov">AirNow</a>
</footer>

activeweather attribution page

We maintain a comprehensive attribution page at /attribution listing all data sources, their licenses, and update frequencies. You may link to this page as an alternative to inline attribution.