How to Cite This Source

As part of the U.S. government, information on EPA pages is a reliable and authoritative source for research. EPA.gov webpages do not have one author, so use “U.S. EPA” or “U.S. Environmental Protection Agency” in your sources. Find the last updated date at the bottom right of all EPA webpages.

APA style

Title of specific document. (Last update or copyright date; if not known, put n.d.). In title of website. Retrieved date, from link

Example:

What is Acid Rain? (2024). In EPA.gov. Retrieved May 7, 2024, from https://www.epa.gov/acidrain/what-acid-rain

Find more information about APA citations.

Chicago Manual of Style

"Title of specific page." Source. Last modified use the last modified date provided near the bottom of every page in month day, year format. Link.

Example:

"What is Acid Rain?" EPA.gov. Last modified May 7, 2024. https://www.epa.gov/acidrain/what-acid-rain.

Learn more information about Chicago style citations.

MLA style

"Title of specific page." USA.gov, use the last modified date provided near the bottom of every page in day abbreviated month. year format, link.

Example:

"What is Acid Rain?" EPA.gov, 7 May 2024, https://www.epa.gov/acidrain/what-acid-rain.

See more about creating an MLA citation.

If you have any remaining questions about how to cite information on this webpage, please contact us.