What is the air quality trend in Valparaiso?

Over the past 7 days, Valparaiso had an average AQI of 28 based on station measurements. The worst day was 2026-10-20 with AQI 50.

How is Valparaiso air quality measured?

Air quality in Valparaiso 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 Valparaiso, United States

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

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

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

165h

PM2.5 Station

165h · 111 stations

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-10-20	50	26–68	13.1 µg/m³	21h	97
2026-10-19	28	21–42	6.7 µg/m³	24h	112
2026-10-18	22	17–32	5.2 µg/m³	24h	103
2026-10-17	16	12–23	3.9 µg/m³	24h	112
2026-10-16	20	11–44	4.8 µg/m³	24h	107
2026-10-15	24	14–41	5.7 µg/m³	24h	112
2026-10-14	39	18–55	9.5 µg/m³	24h	111

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