What is the air quality trend in Saint Paul?

Over the past 8 days, Saint Paul had an average AQI of 85 based on station measurements. The worst day was 2026-07-16 with AQI 237.

How is Saint Paul air quality measured?

Air quality in Saint Paul 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 Saint Paul, United States

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

Historical PM2.5 and AQI trend from monitoring stations near Saint Paul, United States.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

164h

PM2.5 Station

164h · 5 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	56	31–70	15.3 µg/m³	22h	16
2026-07-20	70	28–105	22.0 µg/m³	24h	16
2026-07-19	92	55–137	31.3 µg/m³	24h	17
2026-07-18	61	45–73	16.9 µg/m³	23h	18
2026-07-17	72	50–128	21.9 µg/m³	24h	18
2026-07-16	237	15–339	186.5 µg/m³	24h	17
2026-07-15	56	36–152	15.9 µg/m³	22h	8
2026-07-14	39	39–39	9.3 µg/m³	1h	5

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