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 7/19/2026 8:00:00 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 | 35 | 16.8 | 26 | ||||||
| Altoona | 0.3 | 28 | 22.0 | ||||||
| Arendtsville | 0.7 | 0.2 | 36 | 36.1 | 0.8 | 2.6 | 3.4 | ||
| Beaver Falls | 25 | 29.9 | 36 | 2.2 | 2.6 | 4.9 | |||
| Brighton Township | 1.7 | 27 | |||||||
| Bristol | 36 | ||||||||
| Carlisle | 32.0 | ||||||||
| Chambersburg | 36 | 38.9 | |||||||
| Charleroi | 0.9 | 30 | 34.4 | 0.5 | 2.6 | 3.2 | |||
| Chester | 37 | 31.9 | 0.4 | 1.6 | 2.1 | ||||
| Erie | 0.4 | 31 | 43.3 | 62 | 0.5 | 1.8 | 2.4 | ||
| Farrell | 31 | 18.7 | |||||||
| Florence | 0.5 | 27 | 33.0 | ||||||
| Fort McIntosh | 27 | 30.2 | |||||||
| Freemansburg | 0 | 35 | 16.8 | 0.9 | 2.8 | 3.7 | |||
| Greensburg | 29 | 38.5 | |||||||
| Harrisburg | 32 | 31.3 | |||||||
| Hershey | 32 | 34.5 | 50 | ||||||
| Holbrook | 28 | 45.9 | |||||||
| Houston | 24 | 35.1 | 0.3 | 1.4 | 1.8 | ||||
| Johnstown | 0.7 | 0.2 | 31 | 36.4 | 49 | 0 | 1.2 | 1.3 | |
| Kittanning | 28 | 22.9 | |||||||
| Kutztown | 32 | ||||||||
| Lancaster | 35 | 35.9 | 44 | ||||||
| Lancaster Downwind | 33 | 31.1 | |||||||
| Lebanon | 31 | 30.5 | |||||||
| Marcus Hook | 23.7 | ||||||||
| Methodist Hill | 35 | ||||||||
| Montoursville | 31 | ||||||||
| Moshannon | 30 | 20.5 | |||||||
| New Garden - Airport | 37 | 27.3 | 1.3 | ||||||
| New Milford | 17.3 | ||||||||
| Norristown | 26 | 23.3 | |||||||
| Peckville | 31 | ||||||||
| Reading Airport | 1.3 | 34 | 24.8 | ||||||
| Salladasburg | 18.1 | ||||||||
| Scranton | 0.4 | 0 | 29 | 22.5 | 29 | 0.4 | 0.9 | 1.4 | |
| State College | 0.3 | 29 | 21.9 | 1.1 | 0.2 | 1.4 | |||
| Strongstown | 0.6 | 28 | 32.1 | ||||||
| Swiftwater | 33 | 18.5 | |||||||
| Tioga County | 31 | 24.7 | 0.1 | 0.8 | 1 | ||||
| Towanda | 32 | 21.1 | 0 | 0.8 | 0.9 | ||||
| Tunkhannock | 20.2 | ||||||||
| Uniontown | 30 | 39.2 | 0.4 | 2.1 | 2.6 | ||||
| Warren - Overlook | 0.6 | 31 | 37.7 | ||||||
| Warren East | 0.4 | ||||||||
| York | 0.6 | 37 | 35.3 | 1.2 | 2.2 | 3.4 | |||
| York Downwind | 36 |
| Site Name | 1-Hr SWS (mph) | 1-Hr VWS (mph) | 1-Hr VWD (degs) | 1-Hr AT (degF) | 1-Hr SR (w/m2) |
|---|---|---|---|---|---|
| Allentown | 8.4 | 7.8 | 329 | 71 | 498 |
| Altoona | 2.9 | 2.5 | 55 | 70 | 342 |
| Arendtsville | 10.9 | 10.6 | 336 | 74 | 418 |
| Beaver Falls | 2.3 | 1.9 | 10 | 68 | 167 |
| Brighton Township | 4.1 | 3.7 | 30 | 67 | 336 |
| Bristol | 8.0 | 7.2 | 335 | 76 | 583 |
| Carlisle | 6.4 | 5.7 | 331 | 73 | 361 |
| Chambersburg | 441 | ||||
| Charleroi | 2.3 | 2.0 | 20 | 72 | 294 |
| Chester | 9.5 | 9.1 | 339 | 77 | 484 |
| Erie | 5.4 | 4.9 | 5 | 68 | 340 |
| Farrell | 5.9 | 5.2 | 29 | 67 | 544 |
| Florence | 4.4 | 3.8 | 339 | 68 | 338 |
| Fort McIntosh | 3.2 | 2.3 | 27 | 69 | 221 |
| Freemansburg | 8.0 | 7.1 | 339 | 73 | 551 |
| Greensburg | 3.9 | 3.6 | 4 | 68 | 225 |
| Harrisburg | 1.6 | 1.5 | 328 | 75 | 428 |
| Hershey | 3.8 | 3.2 | 342 | 75 | 535 |
| Holbrook | 3.7 | 3.1 | 358 | 68 | 288 |
| Houston | 1.1 | 0.3 | 299 | 72 | 314 |
| Johnstown | 4.2 | 4.0 | 41 | 68 | 139 |
| Kittanning | 6.6 | 6.3 | 12 | 66 | 427 |
| Kutztown | 3.6 | 3.1 | 0 | 72 | 391 |
| Lancaster | 7.4 | 7.1 | 340 | 74 | 492 |
| Lancaster Downwind | |||||
| Lebanon | 7.3 | 7.1 | 346 | 73 | 509 |
| Marcus Hook | |||||
| Methodist Hill | |||||
| Montoursville | 4.6 | 3.7 | 1 | 69 | 490 |
| Moshannon | |||||
| New Garden - Airport | 5.3 | 4.4 | 325 | 75 | 534 |
| New Milford | 4.7 | 3.8 | 308 | 62 | 420 |
| Norristown | 4.7 | 3.5 | 337 | 74 | 385 |
| Peckville | 5.9 | 5.1 | 328 | 67 | 365 |
| Reading Airport | 7.6 | 6.7 | 339 | 73 | 473 |
| Salladasburg | 6.6 | 6.2 | 5 | 70 | 490 |
| Scranton | 2.9 | 2.1 | 336 | 68 | 387 |
| State College | 3.2 | 2.3 | 345 | 68 | 417 |
| Strongstown | 3.3 | 2.6 | 352 | 64 | 243 |
| Swiftwater | 7.9 | 7.4 | 1 | 67 | 590 |
| Tioga County | 3.3 | 1.5 | 22 | 60 | 465 |
| Towanda | 3.8 | 2.3 | 352 | 68 | 441 |
| Tunkhannock | 8.6 | 7.7 | 316 | 64 | 563 |
| Uniontown | |||||
| Warren - Overlook | 3.3 | 2.5 | 351 | 163 | |
| Warren East | 3.8 | 2.9 | 27 | 67 | 446 |
| York | 8.2 | 7.8 | 341 | 75 | 530 |
| York Downwind | 2.8 | 2.6 | 347 | 74 | 515 |
For data comparision purposes, see the National Ambient Air Quality Standards on the EPA web site.
Weather Measurement Definitions
Site Locations by County