Clean Water Act

1972 U.S. federal law regulating water pollution

Clean Water Act

Summary

The Clean Water Act (CWA) is the primary federal law in the United States governing water pollution. Its objective is to restore and maintain the chemical, physical, and biological integrity of the nation's waters; recognizing the primary responsibilities of the states in addressing pollution and providing assistance to states to do so, including funding for publicly owned treatment works for the improvement of wastewater treatment; and maintaining the integrity of wetlands.

Originally created by Efraz18

5/11/2004, 5:30:35 AM

Modified

4/30/2026, 9:32:22 PM

Recent revisions

Onorem4/30/2026, 9:32:22 PM

Reverted edit by [[Special:Contribs/Mynameisryanbarlow|Mynameisryanbarlow]] ([[User talk:Mynameisryanbarlow|talk]]) to last version by ClueBot NG

Mynameisryanbarlow4/30/2026, 9:20:41 PM

/* Reproductive problems */

ClueBot NG4/30/2026, 9:19:21 PM

Reverting possible vandalism by [[Special:Contribs/Mynameisryanbarlow|Mynameisryanbarlow]] to version by Cannolorosa. [[WP:CBFP|Report False Positive?]] Thanks, [[WP:CBNG|ClueBot NG]]. (4508995) (Bot)

Mynameisryanbarlow4/30/2026, 9:19:15 PM

/* Background */

Cannolorosa2/23/2026, 5:25:51 PM

no edit summary no reason given for adding this unnecessary, and no source was added.Undid revision [[Special:Diff/1337723382|1337723382]] by [[Special:Contributions/Be-Plants|Be-Plants]] ([[User talk:Be-Plants|talk]])

Moreau12/11/2026, 4:34:13 AM

/* Waters protected */ c/e; del dupl links

Be-Plants2/11/2026, 2:54:44 AM
PrimeBOT2/2/2026, 1:44:05 AM

/* Waters of the United States definition */ [[Wikipedia:Bots/Requests for approval/PrimeBOT 17|Task 17]] - remove [[UTM parameters]] (Google analytics) from URLs

Moreau112/4/2025, 5:29:04 AM

/* Ecosystem impacts of pollution */ c/e

Moreau112/1/2025, 6:02:58 PM

/* Background */ c/e; New section: Ecosystem impacts of pollution

Moreau112/1/2025, 1:19:14 AM

Reverted 1 edit by [[Special:Contributions/~2025-36766-53|~2025-36766-53]] ([[User talk:~2025-36766-53|talk]]) to last revision by Moreau1

~2025-36766-5311/29/2025, 1:51:51 AM

/* Background */

Moreau110/20/2025, 3:48:44 AM

/* Nonpoint sources */ + refs

Zyxw9/6/2025, 10:21:29 PM

replace http with https in http://web.archive.org/web/.../https://...

GreenC bot8/27/2025, 2:41:43 PM

Rescued 1 archive link. [[User:GreenC/WaybackMedic_2.5|Wayback Medic 2.5]] per [[WP:URLREQ#casetext.com]]

Chris the speller8/9/2025, 2:07:53 PM

replaced: traditionally-defined → traditionally defined (2)

HertzDonuts7/28/2025, 2:17:17 PM

replaced

HertzDonuts7/28/2025, 2:10:17 PM

/* Effects */

HertzDonuts7/28/2025, 2:07:41 PM

/* Case law */

HertzDonuts7/28/2025, 1:59:30 PM

/* Case law */

Contributors

Source: WikipediaView full article