Houston Pollen & Mold — Thursday, May 21, 2026
Measured counts from the Houston Health Department
Pollen: Medium. Mold: Medium.
TreesNone
0 grains/m³
GrassLow
4 grains/m³
WeedsMedium
12 grains/m³
MoldMedium
10,551 spores/m³
This is an archived daily report. See today's Houston pollen count →