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99th Percentile of the Daily Max 1-hour Measurement of Sulfur Dioxide (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/4031

    General Notes: *Median value shows the 50th percentile of counties reporting data to the AQSData Mart; it is not reflective of the entire country. **Hourly average concentrations measured by monitoring equipment and reported to AQS. 99th percentile of the daily max 1-hour values in the year, in parts per billion by volume (ppb).

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