What is the air quality trend in Valparaiso?

Over the past 8 days, Valparaiso had an average AQI of 99 based on station measurements. The worst day was 2026-07-17 with AQI 236.

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 CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

167h

PM2.5 Station

167h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-22	29	26–32	7.0 µg/m³	2h	56
2026-07-21	63	32–98	18.7 µg/m³	24h	106
2026-07-20	97	62–104	33.8 µg/m³	24h	102
2026-07-19	112	96–159	41.1 µg/m³	24h	105
2026-07-18	49	31–86	12.7 µg/m³	24h	106
2026-07-17	236	66–370	183.2 µg/m³	24h	112
2026-07-16	151	35–326	99.5 µg/m³	24h	105
2026-07-15	59	52–164	16.9 µg/m³	21h	109

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