Air Quality Lab — Houston, United States
Air Quality Profile
Houston reports an annual PM2.5 of 8.9 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Houston
United States
United StatesAnnual Average
GoodWHO annual classification
8.9µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
8.38.3 µg/m³ — Good
7.97.9 µg/m³ — Good
8.08.0 µg/m³ — Good
8.68.6 µg/m³ — Good
7.87.8 µg/m³ — Good
1010 µg/m³ — Fair
8.58.5 µg/m³ — Good
1010 µg/m³ — Good
1111 µg/m³ — Fair
9.49.4 µg/m³ — Good
8.88.8 µg/m³ — Good
7.57.5 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
8.38.3 µg/m³ — Good
7.97.9 µg/m³ — Good
8.08.0 µg/m³ — Good
8.68.6 µg/m³ — Good
7.87.8 µg/m³ — Good
1010 µg/m³ — Fair
Jul
Aug
Sep
Oct
Nov
Dec
8.58.5 µg/m³ — Good
1010 µg/m³ — Good
1111 µg/m³ — Fair
9.49.4 µg/m³ — Good
8.88.8 µg/m³ — Good
7.57.5 µg/m³ — Good
Best months: Feb, May, DecWorst months: Jun, Aug–Sep
Good5–10 µg/m³Fair10–15 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across United States
Houston: 8.9 µg/m³. Typical range in United States: 6.4–7.8 µg/m³. Low anchor: Anchorage, 4.3 µg/m³. High anchor: Los Angeles, 13.8 µg/m³.
2,121 cities tracked