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Border Air Quality Data - About HAP Monitoring Sites

Monitoring sites for hazardous air pollutants (HAPs) are not as widespread as criteria air pollutant monitors. Some states have only a few sites that measure ambient concentrations of hazardous air pollutants, or the sites measure only a few hazardous air pollutants. As a result, you may have difficulty "finding" data for a border air quality report.

Finding HAP Data

The border air quality data HAP Monitor Count report can tell you which U.S.-Mexico border regions, states, and counties have reported monitoring data for any hazardous air pollutant, or for a specific one. The examples that follow illustrate "survey reports" you could use to locate hazardous air pollutant monitoring sites. See the HAP Monitor Count report help page for details of report options.

Example 1: Where in the U.S.-Mexico border area was HAP monitoring done in year 2003?

A HAP Monitor Count report showing border region summaries for all hazardous air pollutants answers this question.

Selection criteria for the report:

The report shows how many monitors reported data in each border region, the total number of monitors, and the number of distinct hazardous air pollutants reported by all the monitors. [Display the report now, in this / separate browser window.]

Example 2: Which counties in the U.S.-Mexico border area 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:

The report lists each county in the U.S.-Mexico border area that reported naphthalene monitoring data in years 2001-2003, and the number of monitors in each one. [Display the report now, in this / separate browser window.]

Example 3: Where are HAP monitoring sites in the Imperial Valley border region, and what HAPs did they measure in 2002?

A HAP Monitor Count report showing site-level information answers this question.

Selection criteria for the report:

The report lists each monitoring site in the Imperial Valley border region that reported any hazardous air pollutant monitoring data in 2002. You may "drill down" to see a list of all hazardous air pollutants measured at a site, and the highest values reported for each pollutant. [Display the report now, in this / separate browser window.]


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