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 1/31/2026 1:00:00 PM
| 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 | 38 | 4.9 | 9 | ||||||
| Altoona | 0.2 | 36 | 2.8 | ||||||
| Arendtsville | 0.1 | 0.5 | 38 | 2.8 | 1 | 0.9 | 1.9 | ||
| Beaver Falls | 35 | 6.7 | 9 | 3.8 | 6.4 | 10.2 | |||
| Brighton Township | 0 | 37 | |||||||
| Bristol | 40 | ||||||||
| Carlisle | 3.1 | ||||||||
| Charleroi | 0.3 | 31 | 6.1 | 5.8 | 8.6 | 14.4 | |||
| Chester | 36 | 5.7 | 0.9 | 2.7 | 3.7 | ||||
| Erie | 0.2 | 2.9 | 6 | 1.7 | 3 | 4.8 | |||
| Farrell | 33 | 6.1 | |||||||
| Florence | 0 | 39 | 4.3 | ||||||
| Fort McIntosh | 38 | 5.1 | |||||||
| Freemansburg | 0.1 | 40 | 4.8 | 1.3 | 2.6 | 3.9 | |||
| Greensburg | 33 | 5.9 | |||||||
| Harrisburg | 38 | 4.8 | |||||||
| Hershey | 37 | 4.9 | 9 | ||||||
| Holbrook | 38 | 3.1 | |||||||
| Houston | 39 | 4.7 | 2.6 | 3.9 | 6.5 | ||||
| Johnstown | 0.1 | 0.6 | 37 | 4.0 | 12 | 1.5 | 3.1 | 4.7 | |
| Kittanning | 35 | 6.0 | |||||||
| Kutztown | 40 | ||||||||
| Lancaster | 38 | 6.6 | 9 | ||||||
| Lancaster Downwind | 39 | 6.9 | |||||||
| Lebanon | 35 | 5.8 | |||||||
| Marcus Hook | 5.6 | ||||||||
| Methodist Hill | 42 | ||||||||
| Montoursville | 39 | ||||||||
| New Garden - Airport | 39 | 6.1 | 0.1 | ||||||
| New Milford | 2.9 | ||||||||
| Norristown | 39 | 6.1 | |||||||
| Peckville | 35 | ||||||||
| Reading Airport | 2.2 | 40 | 6.1 | ||||||
| Salladasburg | 3.1 | ||||||||
| Scranton | 0.3 | 0.3 | 34 | 4.9 | 17 | 1.2 | 2.5 | 3.7 | |
| State College | 0.3 | 42 | 2.6 | 0.3 | 0.2 | 0.6 | |||
| Strongstown | 0.7 | 39 | 2.9 | ||||||
| Swiftwater | 37 | 5.8 | |||||||
| Tioga County | 38 | 3.4 | |||||||
| Towanda | 35 | 4.0 | 0 | 1.4 | 1.5 | ||||
| Tunkhannock | 2.7 | ||||||||
| Uniontown | 36 | 4.6 | 3.2 | 4.6 | 7.8 | ||||
| Warren - Overlook | 0 | 36 | 5.1 | ||||||
| Warren East | 0.2 | ||||||||
| York | 0.5 | 41 | 7.5 | 2.6 | 3.3 | 6 | |||
| York Downwind | 38 |
| Site Name | 1-Hr SWS (mph) | 1-Hr VWS (mph) | 1-Hr VWD (degs) | 1-Hr AT (degF) | 1-Hr SR (w/m2) |
|---|---|---|---|---|---|
| Allentown | 5.6 | 4.9 | 321 | 21 | 523 |
| Altoona | 4.3 | 3.2 | 358 | 18 | 301 |
| Arendtsville | 9.8 | 9.1 | 336 | 18 | 521 |
| Beaver Falls | 4.5 | 4.1 | 339 | 17 | 318 |
| Brighton Township | 4.9 | 4.1 | 330 | 15 | 300 |
| Bristol | 5.6 | 5.1 | 356 | 21 | 382 |
| Carlisle | 6.6 | 5.8 | 329 | 18 | 511 |
| Charleroi | 2.9 | 2.0 | 349 | 17 | 371 |
| Chester | 8.0 | 7.7 | 345 | 21 | 332 |
| Erie | 4.6 | 4.1 | 0 | 9 | 371 |
| Farrell | 5.3 | 4.9 | 321 | 14 | |
| Florence | 5.6 | 4.6 | 299 | 17 | 426 |
| Fort McIntosh | 2.8 | 0.6 | 4 | 18 | 326 |
| Freemansburg | 5.5 | 4.7 | 347 | 22 | 506 |
| Greensburg | 2.2 | 0.8 | 7 | 14 | 341 |
| Harrisburg | 2.9 | 2.8 | 11 | 19 | 421 |
| Hershey | 5.3 | 4.8 | 354 | 17 | 347 |
| Holbrook | 5.8 | 4.4 | 354 | 13 | 418 |
| Houston | 3.8 | 3.3 | 23 | 16 | 312 |
| Johnstown | 8.1 | 7.9 | 28 | 13 | 231 |
| Kittanning | 4.0 | 3.3 | 251 | 15 | 347 |
| Kutztown | 3.3 | 2.8 | 320 | 21 | 520 |
| Lancaster | 7.9 | 7.4 | 340 | 17 | 433 |
| Lancaster Downwind | |||||
| Lebanon | 7.3 | 6.9 | 343 | 16 | 354 |
| Marcus Hook | |||||
| Methodist Hill | |||||
| Montoursville | 5.5 | 5.2 | 0 | 18 | 438 |
| New Garden - Airport | 5.6 | 5.0 | 335 | 20 | 561 |
| New Milford | 4.7 | 3.5 | 289 | 13 | 277 |
| Norristown | 5.6 | 4.9 | 0 | 22 | 535 |
| Peckville | 5.2 | 4.4 | 318 | 16 | 292 |
| Reading Airport | 6.1 | 5.2 | 318 | 19 | 520 |
| Salladasburg | 3.5 | 2.6 | 330 | 21 | 332 |
| Scranton | 4.3 | 3.9 | 349 | 18 | 272 |
| State College | 3.7 | 3.0 | 344 | 17 | 372 |
| Strongstown | 4.5 | 4.1 | 328 | 11 | 275 |
| Swiftwater | 5.4 | 4.8 | 356 | 18 | 518 |
| Tioga County | 3.2 | 2.5 | 308 | 9 | 228 |
| Towanda | 2.2 | 1.1 | 291 | 17 | 235 |
| Tunkhannock | 8.7 | 8.2 | 306 | 14 | 284 |
| Uniontown | |||||
| Warren - Overlook | 2.9 | 2.7 | 276 | 13 | 269 |
| Warren East | 3.9 | 3.5 | 17 | 15 | 143 |
| York | 7.7 | 7.2 | 351 | 18 | 466 |
| York Downwind | 4.7 | 4.5 | 3 | 16 | 524 |
For data comparision purposes, see the National Ambient Air Quality Standards on the EPA web site.
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