Publishing Standards
Every figure on PlainAirData traces back to a named public source, computed by documented pipelines. The publishing organization is accountable for the data framing, methodology, and corrections you read here.
- PlainAirData
Independent data publisher · EPA air-quality data analysis
PlainAirData publishes analysis of EPA air-quality and AQI data. County, state, and research pages are built from public government datasets through a documented pipeline, with PlainAirData accountable for the methodology, framing, and corrections. PlainAirData accepts no payment from any entity it covers.
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PlainAirData is a data-journalism publisher: we compile public datasets, verify them against their official sources, and present them in plain language. Editorial standards, sourcing, and how we handle corrections are described on our about and methodology pages.
Download the EPA AQS annual county AQI extract cited on this page: annual-aqi-by-county.csv or the JSON distribution (public domain / CC0). Method notes live on /methodology and /data.