Worst air pollution York, today and tomorrow
Today (30 August): Air quality in York is moderate. AQI and O3 are moderate; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 10:00 AM (O3: 42.4/100).
Tomorrow (31 August 2026): Air quality in York is fair. AQI improves to fair; O3 decreases to fair; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 31.4/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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York's air quality in Pennsylvania reflects the Codorus Creek valley's position in the mid-Atlantic corridor, with vehicle emissions from I-83 and US-30 and the surrounding manufacturing and logistics industry contributing local sources. The gentle Pennsylvania Piedmont terrain provides reasonable wind dispersal, while the broader mid-Atlantic regional airshed contributes upwind industrial and urban sources from the Baltimore-Washington corridor to the south and the Philadelphia corridor to the east during prevailing summer wind patterns.
Today - 30 August | Pollution peaks at 10:00
AQI:
Moderate
42.4/100
PM2.5 (fine particles):
Good
8.4/100
PM10 (coarse particles):
Good
5.9/100
NO2 (nitrogen dioxide):
Good
14.3/100
O3 (ozone):
Moderate
42.4/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.5/100
PM1 (ultrafine particles):
Good
5.4/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 12:00
AQI:
Fair
31.4/100
PM2.5 (fine particles):
Good
9.5/100
PM10 (coarse particles):
Good
6.6/100
NO2 (nitrogen dioxide):
Good
10.4/100
O3 (ozone):
Fair
31.4/100
SO2 (sulfur dioxide):
Good
1.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.4/100
PM1 (ultrafine particles):
Good
5.5/100
Pollen forecast in York
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in York
Frequently Asked Questions
Is air quality bad in York right now?
On 30 August 2026, overall air quality in York is moderate. AQI is the main air quality indicator at 42.4/100. Pollution peaks around 10:00 AM (O3: 42.4/100).
Will air quality be worse tomorrow in York?
On 31 August 2026, air quality conditions in York will be better than today, with AQI forecast at fair at 31.4/100. Pollution peaks around 12:00 PM (O3: 31.4/100).
When is air pollution at its worst in York?
Seasonal changes shape air quality across York. Typically, once summer ozone season ends, winter typically offers the cleanest air, while hot, humid summer conditions and regional haze drive ozone spikes, especially during heat waves. Dense urban traffic corridors add a persistent background level of pollution that varies less by season than ozone does.
Are air quality levels in York based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 30 August 2026 at 20:26 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
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