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Web Standard: Maps


Maps may be:

  • Interactive
    • EPA’s GeoPlatform INTRANET
    • Leaflet
      • Leaflet is an open-source and lightweight JavaScript library for mobile friendly interactive maps. This library is aimed at simple maps. See the Leaflet JavaScript Library page for more information on usage and benefits.
  • Static map image - a picture of a map

Content requirements

  • Do not use Google maps or other commercial maps. We have no licensing agreement for Google Maps.
  • U.S. map of states or EPA regions must use the standard U.S. National Maps (formerly called ‘Where You Live’)
  • Maps will have:
    • A title, that includes the word “map”, located above the map in header tag <h2> – <h4>.
    • A description in caption text or alt text of what the map displays.
    • A link to equivalent content in text form.
  • Recommended best practice is to link to equivalent content in text form. Near-Real-Time and Laboratory Data by State is an example. 

About this Standard

All EPA public web content must adhere to the EPA Web Standards, the U.S. Web Design System guidelines, and the 21st Century Integrated Digital Experience Act.

Original effective date: 09/12/2012
Last approved on: 07/08/2020
Web Council review by: 07/08/2023 (or earlier if deemed necessary by the Web Council)