EPA
Set to 114 different clues across 149 published puzzles, most often “Clean air org.” — The New York Times, Sunday, 27 April 2008.
3 letters
Every clue on record, most used first
- Clean air org.5 times
The New York Times — Sunday, 27 April 2008
- Waste watchers: Abbr.4 times
The New York Times — Wednesday, 9 July 2008
- Ecol. watchdog4 times
The New York Times — Wednesday, 15 December 2004
- UV index monitor3 times
The New York Times — Sunday, 29 May 2011
- DDT banner3 times
The New York Times — Thursday, 23 October 2008
- Abbr. in car ads3 times
The New York Times — Saturday, 30 August 2008
- Emissions watchdog: Abbr.3 times
The New York Times — Tuesday, 11 January 2005
- Clean air grp.3 times
The New York Times — Tuesday, 14 September 2004
- Clean Air Act org.2 times
The New York Times — Monday, 9 November 2009
- Org. with an Office of Water2 times
The New York Times — Sunday, 8 February 2009
- Air quality org.2 times
The New York Times — Tuesday, 21 October 2008
- Org. established by Nixon2 times
The New York Times — Thursday, 13 March 2008