§ 52.2721 - Classification of regions.

Latest version.

§ 52.2721 Classification of regions.

The Puerto Rico plan was evaluated on the basis of the following classifications.

Air quality control region	Pollutant
Air quality control region	Particulate matter	Sulfur oxides	Nitrogen dioxide	Carbon monoxide	Photochemical oxidants (hydrocarbons)
Puerto Rico	IA	IA	III	III	III

[37 FR 10905, May 31, 1972]

                    
                        var val = document.getElementById('citecontent').innerHTML;
                        art.dialog.defaults.title = window.location.href;
                        art.dialog.data('cite', val);
                        art.dialog.data('homeDemoPath', '/Scripts/plus/artDialog/');
                        art.dialog.open('/Scripts/plus/artDialog/citeiframe.html');