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Site Updated November 10, 2025
Visitors to this site since July 1, 2025:
CNYWeather.com hosts a PurpleAir Flex Air Quality Monitor
The results are automatically sent to purpleair.com website for aggregation and analysis.
The readings below are from the sensor unit.
The US EPA AQI ranges from 0 to 500, and is partitioned into six categories to report levels of five major pollutants;
including particulate matter (PM) such as PM2.5 and PM10. (The subscript refers to the diameter of the particle in microns.)
| Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
|---|---|---|---|---|---|
| 0-50 | 51-100 | 101-150 | 151-200 | 201-300 | 301-500 |
The US EPA AQI for PM is calculated from a 24-hour average: this is based on hourly averages of PM concentrations and is updated daily.
The EPA also reports a real-time AQI called the NowCast. This station's data is updated every 30 minutes.
This page displays air quality data from a PurpleAir sensor located in Westmoreland, NY.
The data is automatically updated every 30 minutes from a sensor located in Westmoreland, NY.
The Air Quality Index (AQI) is a standardized way to report air quality.
It converts complex air quality data into numbers and colors
that help people understand when to take action to protect their health.
The AQI focuses on health effects that can happen within a few
hours or days after breathing polluted air.