The data on this site is collected using sophisticated sampling equipment located across the state. Occasionally, hardware or software fails and provides no data or erroneous data until a technician can service it. In addition, this data has not yet been quality assured/quality controlled so some data may be incomplete or inaccurate. The final quality assured/quality controlled data can be found on EPA’s Air Quality Data website.
Pennsylvania Department of Environmental Protection
Bureau of Air Quality
Latest Hourly Data Collected on 5/15/2026 2:00:00 AM
| Site Name | 1-Hr CO (ppm) | 1-Hr SO2 (ppb) | 1-Hr Ozone (ppb) | 1-Hr PM-2.5 (ug/m3) | 1-Hr PM-10 (ug/m3) | 1-Hr NO (ppb) | 1-Hr NO2 (ppb) | 1-Hr NOX (ppb) | 1-Hr H2S (ppb) |
|---|---|---|---|---|---|---|---|---|---|
| Allentown | 20 | 1.1 | 3 | ||||||
| Altoona | 0.6 | 25 | 4.0 | ||||||
| Arendtsville | 0.1 | 0.4 | 28 | 3.5 | 0.5 | 1.2 | 1.8 | ||
| Beaver Falls | 7 | 3.2 | 7 | 5.1 | 14.6 | 19.7 | |||
| Brighton Township | 0 | 27 | |||||||
| Bristol | 20 | ||||||||
| Carlisle | 3.4 | ||||||||
| Charleroi | 0.1 | 28 | 2.6 | 0 | 3.4 | 3.2 | |||
| Chester | 19 | 2.0 | 0.2 | 3 | 3.3 | ||||
| Erie | 0.0 | 24 | 2.6 | 6 | 0.4 | 4.2 | 4.6 | ||
| Farrell | 25 | 2.4 | |||||||
| Florence | 0 | 23 | 3.0 | ||||||
| Fort McIntosh | 22 | 2.7 | |||||||
| Freemansburg | 0.5 | 20 | 1.3 | ||||||
| Greensburg | 28 | 2.8 | |||||||
| Harrisburg | 25 | 3.3 | |||||||
| Hershey | 24 | 3.2 | 5 | ||||||
| Holbrook | 30 | 2.6 | |||||||
| Houston | 18 | 3.0 | 0.3 | 2.4 | 2.8 | ||||
| Johnstown | 0.1 | 0 | 29 | 2.9 | 8 | 0 | 1.8 | 1.8 | |
| Kittanning | 25 | 3.1 | |||||||
| Kutztown | 19 | ||||||||
| Lancaster | 22 | 4.2 | 5 | ||||||
| Lancaster Downwind | 22 | 2.6 | |||||||
| Lebanon | 20 | 3.4 | |||||||
| Marcus Hook | 1.7 | ||||||||
| Methodist Hill | 28 | ||||||||
| Montoursville | 24 | ||||||||
| Moshannon | 26 | 4.7 | |||||||
| New Garden - Airport | 24 | 2.5 | 0.2 | ||||||
| New Milford | 3.8 | ||||||||
| Norristown | 22 | 1.4 | |||||||
| Peckville | 21 | ||||||||
| Reading Airport | 0.4 | 22 | 2.7 | ||||||
| Salladasburg | 1.3 | ||||||||
| Scranton | 0.2 | 0.1 | 19 | 2.8 | 4 | ||||
| State College | 0.2 | 26 | 2.4 | 0 | 1 | 1 | |||
| Strongstown | 0.3 | 24 | 3.8 | ||||||
| Swiftwater | 22 | 2.7 | |||||||
| Tioga County | 26 | 4.0 | |||||||
| Towanda | 21 | 3.5 | 0 | 1.5 | 1.3 | ||||
| Tunkhannock | 3.5 | ||||||||
| Uniontown | 22 | 2.9 | 0 | 2.9 | 2.9 | ||||
| Warren - Overlook | 0.5 | 26 | 5.4 | ||||||
| Warren East | 1.9 | ||||||||
| York | 0.4 | 26 | 4.6 | 1.7 | 5.6 | 7.4 | |||
| York Downwind | 25 |
| Site Name | 1-Hr SWS (mph) | 1-Hr VWS (mph) | 1-Hr VWD (degs) | 1-Hr AT (degF) | 1-Hr SR (w/m2) |
|---|---|---|---|---|---|
| Allentown | 4.5 | 4.0 | 292 | 48 | 0 |
| Altoona | 1.9 | 1.2 | 18 | 48 | 0 |
| Arendtsville | 12.4 | 12.3 | 313 | 49 | 0 |
| Beaver Falls | 1.4 | 0.6 | 68 | 44 | 0 |
| Brighton Township | 5.8 | 5.7 | 282 | 44 | 0 |
| Bristol | 5.4 | 5.2 | 294 | 51 | 0 |
| Carlisle | 7.3 | 7.0 | 318 | 48 | 0 |
| Charleroi | 1.4 | 1.4 | 4 | 1 | |
| Chester | 5.9 | 5.7 | 303 | 52 | 0 |
| Erie | 1.2 | 0.3 | 118 | 47 | 0 |
| Farrell | 2.8 | 2.7 | 281 | 44 | 0 |
| Florence | 2.1 | 1.9 | 257 | 43 | 0 |
| Fort McIntosh | 2.8 | 2.5 | 289 | 46 | 0 |
| Freemansburg | 6.0 | 5.7 | 297 | 50 | 0 |
| Greensburg | 2.7 | 2.4 | 295 | 48 | 0 |
| Harrisburg | 2.3 | 2.2 | 326 | 50 | 0 |
| Hershey | 4.7 | 4.4 | 294 | 49 | 0 |
| Holbrook | 5.9 | 5.8 | 291 | 45 | 0 |
| Houston | 2.3 | 2.2 | 4 | 42 | 0 |
| Johnstown | 2.9 | 2.6 | 45 | 48 | 0 |
| Kittanning | 3.5 | 3.3 | 318 | 45 | 0 |
| Kutztown | 1.4 | 0.9 | 289 | 47 | 0 |
| Lancaster | 8.1 | 7.8 | 304 | 50 | 0 |
| Lancaster Downwind | |||||
| Lebanon | 4.4 | 4.2 | 306 | 49 | 0 |
| Marcus Hook | |||||
| Methodist Hill | |||||
| Montoursville | 4.0 | 3.8 | 293 | 48 | 0 |
| Moshannon | |||||
| New Garden - Airport | 5.3 | 5.0 | 309 | 49 | 0 |
| New Milford | 3.5 | 2.7 | 268 | 42 | 0 |
| Norristown | 5.6 | 5.2 | 295 | 50 | 0 |
| Peckville | 2.5 | 2.0 | 277 | 46 | 0 |
| Reading Airport | 4.9 | 4.6 | 305 | 49 | 0 |
| Salladasburg | 1.2 | 0.5 | 254 | 47 | 0 |
| Scranton | 2.4 | 2.1 | 298 | 46 | 0 |
| State College | 4.9 | 4.6 | 313 | 46 | 0 |
| Strongstown | 1.8 | 1.5 | 295 | 43 | 0 |
| Swiftwater | 6.1 | 5.8 | 355 | 46 | 0 |
| Tioga County | 2.7 | 1.4 | 354 | 37 | 0 |
| Towanda | 1.6 | 1.2 | 276 | 44 | 0 |
| Tunkhannock | 6.5 | 6.2 | 296 | 42 | 0 |
| Uniontown | |||||
| Warren - Overlook | 2.7 | 2.2 | 335 | 45 | 0 |
| Warren East | 3.4 | 3.2 | 29 | 47 | 0 |
| York | 5.4 | 5.2 | 294 | 49 | 0 |
| York Downwind | 3.9 | 3.8 | 312 | 47 | 0 |
For data comparision purposes, see the National Ambient Air Quality Standards on the EPA web site.
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