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Second Highest 1-hour Carbon Monoxide Measurement (County)

Source: EPA AirData Air Quality Statistics Report, Environmental Protection Agency
Topic: Energy and EnvironmentSubtopic: Pollution and Environment Category: Air Quality Measurements
Product: Local StatsDate Updated: June 2020Update Tips
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    * Although preliminary annual statistics are continually released, SAGE Stats only provides final statistics, which are released in May of the following year. Report includes exceptional events; these events (such as wildfires) are not "reasonably controllable" and are hence excluded from assessments relating to air quality regulation, but they nevertheless affect air quality.

    Years Available: 2000–2019

    Permanent Link: http://data.sagepub.com/sagestats/4026

    General Notes: *Median value shows the 50th percentile of counties reporting data to the Air Quality Statistics (AQS)Data Mart; it is not reflective of the entire country. **Hourly average concentrations measured by monitoring equipment and reported to AQS. Second-highest 1-hour values in the year, in parts per million by volume (ppm). For more on exceptional events, see http://www.epa.gov/ttn/analysis/exevents.htm

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