US EPA Nonattainment Areas and Designations - Carbon Monoxide (1990 NAAQS) - Web Service Layer
This web service layer, Carbon Monoxide (1990 NAAQS), displays identified state level areas where carbon monoxide pollution has not met the National Ambient Air Quality Standards (NAAQS) established in 1990 for and have been designated "nonattainment” areas (NAA)". Full FGDC metadata records for each layer may be …