Nitrogen dioxide designations - State recommendation and EPA response for Puerto Rico (U.S. Territory).You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Puerto Rico (U.S. Territory) State Recommendation (PDF)(26 pp, 10 MB, December 6, 2010)
- EPA Response to Puerto Rico Recommendation (PDF)(2 pp, 136 K, June 28, 2011)