651
AEUS71 KPBZ 202030
AQIPBZ

Air Quality Forecast
Pennsylvania Department of Environmental Protection
Relayed by National Weather Service Pittsburgh PA
430 PM EDT Mon Jul 20 2026

Air quality forecasts for Pennsylvania are provided by the
Pennsylvania Department of Environmental Protection.

PAZ014-020>022-029-073>076-212000-
Allegheny-Butler-Beaver-Armstrong-Washington-Westmoreland-Fayette-
430 PM EDT Mon Jul 20 2026

The forecast for Tuesday in Pittsburgh is code YELLOW, which
is moderate, and means that people unusually sensitive to air
pollution may be mildly affected. The primary pollutant will be
fine particles.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/

$$

PAZ021-212000-
Allegheny-
430 PM EDT Mon Jul 20 2026

The forecast for Tuesday in the Mon Valley area is code YELLOW,
which is moderate, and means that people unusually sensitive to
air pollution may be mildly affected. The primary pollutant will
be fine particles.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/

$$

PAZ077-078-212000-
Indiana-Higher Elevations of Indiana-
430 PM EDT Mon Jul 20 2026

The forecast for Tuesday in Indiana county is code YELLOW, which
is moderate, and means that people unusually sensitive to air
pollution may be mildly affected. The primary pollutant will be
fine particles.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/

$$

PAZ007-212000-
Mercer-
430 PM EDT Mon Jul 20 2026

The forecast for Tuesday in Mercer county is code YELLOW, which
is moderate, and means that people unusually sensitive to air
pollution may be mildly affected. The primary pollutant will be
fine particles.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/

$$