What is the air quality trend in Webster Groves?

Over the past 8 days, Webster Groves had an average AQI of 64 based on station measurements. The worst day was 2026-07-17 with AQI 108.

How is Webster Groves air quality measured?

Air quality in Webster Groves is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Webster Groves, United States

Name: Webster Groves Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Webster Groves, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

160h

PM2.5 Station

160h · 6 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	49	32–61	12.7 µg/m³	16h	4
2026-07-20	69	25–130	21.2 µg/m³	23h	4
2026-07-19	51	24–107	14.3 µg/m³	23h	5
2026-07-18	60	20–107	17.5 µg/m³	23h	5
2026-07-17	108	27–286	49.8 µg/m³	24h	5
2026-07-16	79	24–175	27.6 µg/m³	24h	6
2026-07-15	49	23–82	12.7 µg/m³	24h	6
2026-07-14	50	47–54	12.2 µg/m³	3h	7

Back to Webster Groves Air Quality