We use web measurement and customization technologies to optimize your experience during your visit to our websites and to provide statistically accurate data about how you use our website. These technologies are commonly known as "cookies," and may include the use of persistent cookies and other web measurement and customization technologies.
There are three "tiers" of these web measurement and customization technologies, as established by the Office of Management and Budget (OMB):
This technology tracks the user's online interactions within a single session or visit to a single website. Any information related to a particular visit to the website is deleted from the user's computer immediately after the session ends.
This technology notices when a user returns to a website and remembers his or her online interactions and preferences across multiple sessions, typically for the purpose of web analytics, but also for customizing people's online experience.
This technology is the same as Tier 2, but ties a tracking mechanism to the user's personally identifiable information.
The following sections include information describing the use of these tiers when you visit Census Bureau websites.
When you visit our websites to read pages or download information, Tier 1 technology is used. We automatically collect and store the following non-personally identifying information:
The information we retain does not include personally identifying information. The above information is maintained in our system logs for analytical purposes. The logs may be kept indefinitely and used at any time and in any way necessary to prevent a security breach and to ensure the integrity of the data on our servers.
When you make use of American FactFinder, Tier 1 technology is used. Transient cookies are used to keep track of user selections so that new requests for specific data or maps can be created more efficiently. No personally identifiable information is permanently retained on either the users or the Census Bureau's computers. These transient cookies go away completely when you exit the browser. When ordering products, transient cookies are enabled to track your order through the process.
When responding to surveys over the Internet that collect personally identifiable information, Tier 2 technology is used. Use of this technology is automatic unless you decline or opt-out.
The following also applies to personally identifiable information provided in response to a Census Bureau survey or census.
The technologies we describe in this policy are the default settings. However, you can remove or block the use of web measurement and customization technologies by changing the setting of your browser to block cookies as described at http://www.usa.gov/optout_instructions.shtml.
Should you choose to remove or block the use of web measurement and customization technologies (opt out), we will make provide you with alternatives for acquiring comparable information or services.