File:US Wastewater Treatment Levels Before & After CWA.png

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Summary[edit]

Summary
Description	Caption: "Population Receiving Different Levels of Wastewater Treatment." Graph showing levels of municipal sewage treatment in the United States, before and after passage of the 1972 Clean Water Act (CWA). Data based on the 2000 EPA Clean Watershed Needs Survey.
Source	Wikimedia Commons file page
Author	U.S. Environmental Protection Agency, Washington, D.C.
Permission	See original Commons license details.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	12:49, 29 May 2026		425 × 404 (18 KB)	Maintenance script (talk \| contribs)	== Summary == Importing file

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