What is the air quality trend in Guaratinguetá?

Over the past 14 days, Guaratinguetá had an average AQI of 55 based on station measurements. The worst day was 2026-07-17 with AQI 81.

How is Guaratinguetá air quality measured?

Air quality in Guaratinguetá 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 Guaratinguetá, Brazil

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

Historical PM2.5 and AQI trend from monitoring stations near Guaratinguetá, Brazil.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

312h

PM2.5 Station

312h · 2 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	35	3–83	8.9 µg/m³	22h	3
2026-07-20	44	21–102	12.3 µg/m³	24h	3
2026-07-19	46	25–97	12.2 µg/m³	24h	3
2026-07-18	50	21–123	13.5 µg/m³	23h	3
2026-07-17	81	3–218	31.8 µg/m³	22h	3
2026-07-16	76	21–229	30.5 µg/m³	22h	3
2026-07-15	64	18–168	20.1 µg/m³	22h	3
2026-07-14	52	10–173	16.7 µg/m³	21h	3
2026-07-13	45	12–95	12.5 µg/m³	24h	3
2026-07-12	75	12–290	35.1 µg/m³	23h	3
2026-07-11	54	14–163	16.8 µg/m³	23h	2
2026-07-10	57	21–119	16.6 µg/m³	20h	2
2026-07-09	42	4–95	10.9 µg/m³	22h	3
2026-07-08	50	3–125	15.1 µg/m³	20h	2

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