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Hessville, NY - Air Quality
(Data collected since 10/29/2020)
The Air Quality Index (AQI) is calculated using data from a 24-hour period. That's because the science we have about air pollution exposure and health is based on 24 hours and, therefore, the EPA's air quality standards are based on 24 hours. It is not valid to use shorter-term (e.g. hourly) data to calculate an AQI value. However, it is important to report shorter-term data to caution people in time for them to reduce their 24-hour exposure. The NowCast is EPA's method for relating hourly data to the AQI.
The NowCast AQI is designed to be responsive to rapidly changing air quality conditions, such as during fires. The NowCast calculation uses longer averages during periods of stable air quality and shorter averages when air quality is changing rapidly. The NowCast allows the current air quality values to align more closely with what people are actually seeing or experiencing. This gives people information they can use to protect their health when air quality is poor − and help them get outdoors and get exercise when air quality is good. Nowcast AQI values are updated every 5 minutes.
| NowCast AQI (10µm) | Current AQI (10µm) (24hr avg) | Today's High | Yesterday's High |
|---|---|---|---|
| 5 | 7 | 7 at 7:30 PM | 4 at 11:55 PM |
| High This Month | Date | High This Year | Date | All-Time High | Date |
|---|---|---|---|---|---|
| 12 | 12/05/24 | 455 | 10/15/24 | 455 | 10/15/24 |
| NowCast AQI (2.5µm) | Current AQI (2.5µm) (24hr avg) | Today's High | Yesterday's High |
|---|---|---|---|
| 22 | 30 | 31 at 7:30 PM | 18 at 11:55 PM |
| High This Month | Date | High This Year | Date | All-Time High | Date |
|---|---|---|---|---|---|
| 49 | 12/05/24 | 539 | 10/15/24 | 539 | 10/15/24 |
