Daily Report Archive
Every Houston pollen and mold report we’ve recorded
Browse every daily pollen and mold count from the Houston Health Department, newest first. Each square is one reporting day — its colour is that day’s overall pollen level, and the stripe underneath is the mold level. Select any day to see the tree, grass, weed and mold counts for that date.
1,145 reports archived, from Tuesday, January 4, 2022 to Wednesday, September 23, 2026. Latest report →
2026 173 reports
2025 244 reports
2024 232 reports
2023 248 reports
2022 248 reports
About this archive
The City of Houston publishes pollen and mold counts on weekdays, excluding City holidays — so weekends and holidays have no reading and are simply absent below. Counts are measured at the Health Department’s monitoring station and are reported as grains (pollen) or spores (mold) per cubic metre of air. For trends over a season rather than a single day, see the trends page; for the current day in full, see the full report.