ADA & ADA Title II

The Americans with Disabilities Act (ADA), passed in 1990, is the foundational US civil-rights law prohibiting discrimination against people with disabilities. It predates the web and contains no built-in technical standard for digital content. In practice, that gap has been filled by the courts and by the Department of Justice (DOJ), which treat the Web Content Accessibility Guidelines (WCAG) — most often version 2.1 Level AA — as the working benchmark for whether a website is accessible.

What it is

The ADA is a broad anti-discrimination statute, not a web specification. It says covered entities must not exclude people with disabilities, but it does not spell out pixel-level or code-level requirements. Because of that, web accessibility under the ADA is enforced indirectly: plaintiffs and the DOJ argue that an inaccessible site denies equal access, and they point to WCAG as the measurable yardstick for what "accessible" means. The result is that, although WCAG is not literally written into the original Act, conforming to WCAG 2.1 AA is the established way to demonstrate ADA compliance for digital content.

Who must comply

The ADA binds different groups through its separate titles:

• Title III covers places of public accommodation — private businesses such as shops, banks, restaurants, and their online equivalents. Title III is the most frequent basis for web-accessibility lawsuits in the United States.
• Title II covers state and local government — agencies, public universities, courts, transit authorities, and the services they offer online. In 2024 the DOJ issued a rule under Title II that, for the first time, names a specific technical standard for these public entities.

Relationship to WCAG

WCAG is the shared technical core that the ADA leans on rather than defining its own. For private businesses under Title III, courts and DOJ settlements have repeatedly used WCAG 2.1 AA as the practical measure of an accessible site, even though no regulation formally fixes that version in the Title III context.

For state and local government, the picture is now explicit: the DOJ's 2024 Title II rule sets WCAG 2.1 Level AA as the required standard. Compliance deadlines are staggered by size — larger entities must conform by 2026, and smaller entities by 2027.

Key points

• The ADA (1990) has no built-in web standard; WCAG fills that gap in practice.
• US courts and the DOJ commonly treat WCAG 2.1 AA as the benchmark for an accessible site.
• Title III binds private businesses (public accommodations) and is the most common source of web-accessibility litigation.
• Title II binds state and local government; the DOJ's 2024 rule makes WCAG 2.1 AA the standard.
• Title II deadlines: larger entities by 2026, smaller entities by 2027.

Related lessons

Because the ADA is satisfied in practice by meeting WCAG, the Learn lessons that teach WCAG conformance are the direct route to ADA compliance.

• Browse the Learn lessons — hands-on WCAG techniques for forms, images, structure, and more.
• Accessible forms — labels, errors, and grouping that satisfy the criteria ADA Title II relies on.