The Americans with Disabilities Act (ADA) was first passed in 1990. Twenty years later, the US Department of Justice released an update called the 2010 ADA Standards for Accessible Design. These standards cover the design of physical spaces and have been interpreted to include web locations as well, so it can be difficult for the would-be accessible website designer to use them.

In many situations, covered entities communicate with someone other than the person who is receiving their goods or services. For example, school staff usually talk to a parent about a child’s progress; hospital staff often talk to a patient’s spouse, other relative, or friend about the patient’s condition or prognosis. The rules refer to such people as “companions” and require covered entities to provide effective communication for companions who have communication disabilities.
This is particularly important when working for a government agency or government contractor, as these organizations must follow web accessibility guidelines under Section 508 of the Workforce Rehabilitation Act of 1973. Although ADA and Section 508 compliance are different, the published checklist for Section 508 compliance offers insight into ways to make websites accessible for people with disabilities, and thereby work toward ADA compliance.
Since March 15, 2012, ADA compliance with the 2010 Standards will be required for new construction and alterations. In the period between September 15, 2010 and March 15, 2012, covered entities may choose between the 1991 Standards ADA Compliance (without the elevator exemption for Title II facilities), the Uniform Federal Accessibility Standards (Title II facilities only), and the 2010 Standards ADA Compliance.
This guidance document is not intended to be a final agency action, has no legally binding effect, and may be rescinded or modified in the Department's complete discretion, in accordance with applicable laws. The Department's guidance documents, including this guidance, do not establish legally enforceable responsibilities beyond what is required by the terms of the applicable statutes, regulations, or binding judicial precedent.
Both sites support multiple languages (English and Spanish), and both include lang="es" on the element of the Spanish pages. However, on the CDC site, in addition to lang="es" the element has xml:lang="en". This potentially sends mixed messages to screen readers (is this web page in Spanish or English?) JAWS 13 seems to honor lang rather than xml:lang but I don't know about other screen readers.
I should mention one caveat to all of this. Businesses that are required to comply but don't have the ability to bring their websites into compliance can provide an accessible alternative to provide the same information, goods, and services that they provide online, like a staffed phone line. The trick, however, is that this option has to provide at least equal access, including in terms of hours of operation. And, as we know, the internet is around 24/7, so good luck with that. 
I own a medical practice in California with 5 employees. Since I have under 15 employees am I exempt from needing to have my website comply with the ADA? I know that my physical practice is exempt from ADA policies regarding employment (under 15) but I don’t know if that extends to websites. My website is not an important part of my practice and I don’t really want to sink any funds into it if I don’t need to.

...the full and equal enjoyment of the goods, services, facilities, or accommodations of any place of "public accommodation" by any person who owns, leases, or operates a place of public accommodation. Public accommodations include most places of lodging (such as inns and hotels), recreation, transportation, education, and dining, along with stores, care providers, and places of public displays.

It’s an important tool because Contact Form 7 isn’t so accessible by default. The plugin adds a selection of accessible form types to use as the basis for your new form. Note that it doesn’t affect pre-existing forms – just new ones. For existing forms, you’ll have to recreate them using the new templates. That’s why it’s recommended that you install this companion plugin on your site at the same time as Contact Form 7.
Attitudes toward digital accessibility have evolved over time. In 2010, the Justice Dept. said they would address the topic. They said the ADA covers web sites, including companies that don’t have brick and mortar presences. They said companies can comply with the law by offering an alternative means of access, so if a web site isn’t ADA compliant, they could offer 24/7 phone access as an example of alternative access.
The U.S. Department of Transportation enforces regulations governing transit, which includes ensuring that recipients of federal aid and state and local entities responsible for roadways and pedestrian facilities do not discriminate on the basis of disability in highway transportation programs or activities. The department also issues guidance to transit agencies on how to comply with the ADA to ensure that public transit vehicles and facilities are accessible.
The ADA guidelines provide the foundation that organizations need to achieve digital accessibility best approaches, however they are not exhaustive. They do not provide direction for all of the accessibility challenges that people with disabilities face. They also fail to provide detailed technical instructions. With these limitations in mind, there is a ray of hope.

Web designers often design in such a way that does not allow the user to adjust font size or color. While they may be protecting their brand, they are also inhibiting some users. Many visually impaired need to use high contrast color settings or very large fonts to read a website. Don't design your website in a way that makes it impossible for them to do this. 
"The United States demands that H&R Block is fined a penalty to 'vindicate the public interest' and to award money to the individuals who sued the company. The ADA prohibits discrimination of disability by public accommodations in the 'full and equal enjoyment of the goods, services, facilities, privileges, advantages and accommodations,'" the Justice Department said in joining the lawsuit.
When collecting feedback, ask users what type of adaptive technologies they use. This will allow you to cater your website to your particular clientele, and will help you appoint resources toward the best compliance options. Navigating the Internet is particularly challenging for people with limited or no vision. Many blind people use specialized web browsers and software that works with standard web browsers, like Internet Explorer, that have features that enable users to maximize their Internet use and experience. This screen reading software reads the HTML code for websites, and gives the user a verbal translation of what is on screen.
The ADA statute identifies who is a person with a disability, who has obligations under the ADA, general non-discrimination requirements and other basic obligations. It delegates fleshing out those obligations to federal agencies. The agencies issue regulations and design standards. The regulations have the details on the rights of people with disabilities and responsibilities of employers, state and local governments, transportation providers, businesses and non-profit organizations. The design standards specify how many entrances need to be accessible, how many toilet rooms and the design for those elements.  To know what the ADA requires, you need to read the law, regulations and design standards.  
Aloha Tatiana! I wish your questions had straightforward easy answers – and if you are government funded it kind of is. (See here: if you are not government funded, this is something that is currently being debated in the legal system. That being said, the WCAG 2.0 guidelines are a good set of guidelines to help protect yourself if you feel you should. (You can see more on WCAG here:
Two agencies within the U.S. Department of Labor enforce parts of the ADA. The Office of Federal Contract Compliance Programs (OFCCP) has coordinating authority under the employment-related provisions of the ADA. The Civil Rights Center (CRC) is responsible for enforcing Title II of the ADA as it applies to the labor- and workforce-related practices of state and local governments and other public entities. Visit the Laws & Regulations subtopic for specific information on these provisions.
The U.S. Department of Health and Human Services (HHS) also enforces Title II of the ADA relating to access to programs, services and activities receiving HHS federal financial assistance. This includes ensuring that people who are deaf or hard-of-hearing have access to sign language interpreters and other auxiliary aids in hospitals and clinics when needed for effective communication.

Again using the WAVE toolbar, check for Errors, Features, and Alerts. If there are many errors, I assume this page will not serve as a good example, and stop checking. If there are only a few errors (e.g., fewer than five) I'll check those errors and might be forgiving if they're relatively minor and are offset by good accessibility in other areas.
People with disabilities are all around us. They live in every country and often experience life in a very different manner than those individuals who don’t have emotional, mental, or physical disabilities. In fact, 15 percent of the global population is classified as disabled. Of this 15 percent, an estimated 190 million people experience significant disabilities.¹

Leading web developers have been pioneering accessibility and publishing standards since 1994. In 1999, the Web Accessibility Initiative (WAI) and the World Wide Web Consortium (W3C) created the Web Content Accessibility Guidelines (WCAG). In essence, the people who determine how the internet is written came together to advise web developers on how to make websites accessible not only to people with disabilities, but to all web users, including those with highly limited devices.

Many deaf-blind individuals use support service providers (SSPs) to assist them in accessing the world around them. SSPs are not “aids and services” under the ADA. However, they provide mobility, orientation, and informal communication services for deaf-blind individuals and are a critically important link enabling them to independently access the community at large.
The ADA requires that title II entities (State and local governments) and title III entities (businesses and nonprofit organizations that serve the public) communicate effectively with people who have communication disabilities. The goal is to ensure that communication with people with these disabilities is equally effective as communication with people without disabilities.
Why was Amazon sued to begin with? Believe it or not, it was the Kindle converter for documents. Amazon has developed its own converter (MobiPocket) to digitize all the documents, books, and magazines that are shown on Kindle. But the problem is that Amazon’s converter was making it difficult for people with disabilities to access any items other than super basic documents.
In many situations, covered entities communicate with someone other than the person who is receiving their goods or services. For example, school staff usually talk to a parent about a child’s progress; hospital staff often talk to a patient’s spouse, other relative, or friend about the patient’s condition or prognosis. The rules refer to such people as “companions” and require covered entities to provide effective communication for companions who have communication disabilities.
As a user who, while I can use a mouse, also likes to use the keyboard, I have found your articles very interesting. I have been trying to update the design of my site to include accessibility as much as possible, without compromising usability for the majority of users. I would appreciate some feedback on the site design.
Title III of the Americans with Disabilities Act (ADA) requires that businesses and nonprofit services providers make accessibility accommodations to enable the disabled public to access the same services as clients who are not disabled. This includes electronic media and web sites. While the ADA applies to businesses with 15 or more employees, even smaller businesses can benefit from ensuring that their websites are ADA compliant. Doing so opens your company up to more potential clients and limits liability. Web developers should include ADA compliant features in the original site and application plans.
Quantum Dynamix recently completed VisionCorps’ brand new website – built to set the standard for visually-impaired, ADA compliant web design and functionality. Discover what features we incorporated and how users who are blind are adjusting to the new website. This is a case study for ADA online compliance that you can utilize for your own website.

The pressure is mounting to implement technology that more directly connects with residents, but balancing the shift to enable all citizens – including the approximately 19 percent with disabilities – can seem insurmountable. Beyond ensuring your organization is doing right your community, being in compliance with the Americans with Disabilities Act (ADA) or Section 508 standards is daunting – especially with the threat of a fine or lawsuit for non-compliance.
This plug-in has been around for some time. Recently they were even advising users to uninstall the old version and install a new one. The new version comes with Skip menus, a button to reset font size, a Skip link inside the accessibility sidebar, and a DOM scanner that automatically checks pages and published posts for accessibility errors such as issues in image ALT, titles, and links. Contrast adjustment, color filters, lights off mode, and link highlighting are the other standout features.
This past September marked the first time a judge ruled that the ADA applies even to businesses without a physical location. Scribd, an e-book subscription service is considered to provide "a place of public accommodation." Their services are not accessible to blind persons because they cannot be read with a screen reader. The judge reasoned, "Now that the Internet plays such a critical role in the personal and professional lives of Americans, excluding disabled persons from access to covered entities that use it as their principal means of reaching the public would defeat the purpose of this important civil rights legislation."
You probably won't have to check your site with all of the available evaluation tools out there, but it is a good idea to do so for the most common web browsers. Just as accessibility software makes it easier for people with disabilities to navigate the Internet, these tools make it easier for developers to ensure accessibility from the start. When you think you've mastered it, go back through the Section 508 compliance checklist to ensure you've met every goal.
The free nationwide telecommunications relay service (TRS), reached by calling 7-1-1, uses communications assistants (also called CAs or relay operators) who serve as intermediaries between people who have hearing or speech disabilities who use a text telephone (TTY) or text messaging and people who use standard voice telephones. The communications assistant tells the telephone user what the other party is typing and types to tell the other party what the telephone user is saying. TRS also provides speech-to-speech transliteration for callers who have speech disabilities.
When choosing an aid or service, title II entities are required to give primary consideration to the choice of aid or service requested by the person who has a communication disability. The state or local government must honor the person’s choice, unless it can demonstrate that another equally effective means of communication is available, or that the use of the means chosen would result in a fundamental alteration or in an undue burden (see limitations below). If the choice expressed by the person with a disability would result in an undue burden or a fundamental alteration, the public entity still has an obligation to provide an alternative aid or service that provides effective communication if one is available.