Pollution Prevention Week is celebrated nationally the third week of September.
Pollution Prevention Week originated in California in 1992 and in 1995 gained widespread popularity when it became a national effort. Since 1995, the National Pollution Prevention Roundtable, based in Washington, D.C. and the largest membership association devoted solely to pollution prevention, is advancing pollution prevention awareness through efforts to encourage and promote widespread participation in National Pollution Prevention Week.
In 2000, President Clinton signed a letter of support for P2 Week and Governors in sixteen states as well as scores of local officials issued official proclamations declaring support for this effort. Several members of Congress also gave strong statements of support on the House and Senate Floors. It is anticipated that in the future there will be a dramatic increase in P2 Week activities, more than doubling the number of official proclamations and congressional statements.