Which counties in the U.S. reported naphthalene ambient monitoring data during 2001-2003?
A HAP Monitor Count report showing county summaries for a specific hazardous air pollutant answers this question. Selection criteria for the report: • Geographic area: United States • Pollutant: Naphthalene • Year: 2001, 2002, 2003 • Optional columns: County, State Abbreviation (omit all other columns) The report lists each U.S. county that reported naphthalene monitoring data in years 2001-2003, and the number of monitors in each one.