ADA, WCAG 2.1 AA, and Website Accessibility
Website accessibility is often discussed in connection with legal requirements and technical standards. Two of the most commonly referenced frameworks in the United States are the Americans with Disabilities Act and the Web Content Accessibility Guidelines.
Understanding how these relate to websites can help organizations make more informed decisions about accessibility.
The Americans with Disabilities Act (ADA)
The ADA is a U.S. law that prohibits discrimination against individuals with disabilities in a variety of areas, including access to services, public accommodations, and government programs.While the ADA was enacted before the modern internet, it has increasingly been interpreted to apply to websites and digital services, particularly when those services are offered to the public.In general terms:
- Title II applies to state and local government entities
- Title III applies to businesses and organizations that serve the public
Courts and regulatory agencies have increasingly treated websites as part of the services these entities provide.
WCAG 2.1 AA: The Technical Standard
The Web Content Accessibility Guidelines (WCAG) are a set of technical recommendations developed by the World Wide Web Consortium (W3C).WCAG 2.1 is one of the most commonly referenced versions, and Level AA is widely used as a practical benchmark when evaluating accessibility.WCAG is organized around four core principles:
- Content should be Perceivable
- Interfaces should be Operable
- Information should be Understandable
- Systems should be Robust
These principles are often referred to collectively as “POUR.”
How ADA and WCAG Relate
The ADA is a law, while WCAG is a technical standard.The ADA itself does not provide a simple checklist for website compliance. Instead, WCAG is often used as a reference point when evaluating whether a website is accessible in practice.For example:
- Courts may look to WCAG when assessing accessibility issues
- Government agencies may reference WCAG in guidance or regulations
- Organizations may adopt WCAG internally as a working standard
However, applying WCAG in real-world scenarios can involve interpretation, testing, and judgment.
Recent Developments
Accessibility expectations continue to evolve over time.
In recent years, there has been increased attention on digital accessibility, including clearer expectations for government entities and continued legal activity involving public-facing websites.
As a result, many organizations are taking a closer look at how accessibility applies to their websites and digital content.
No Single Definition of “Compliance”
For most organizations, accessibility involves:
- Understanding applicable expectations
- Applying best practices during design and development
- Evaluating the website over time
- Making improvements as needed
In some cases, organizations may choose to pursue more formal evaluation through accessibility specialists.
Important Note
This page provides general information about accessibility standards and legal frameworks. It is not legal advice and should not be interpreted as a determination of whether any website meets specific legal or technical requirements.