What is the air quality trend in Guaratinguetá?

Over the past 15 days, Guaratinguetá had an average AQI of 50 based on station measurements. The worst day was 2026-07-17 with AQI 83.

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

299h

PM2.5 Station

299h · 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	36	3–83	9.2 µg/m³	22h	3
2026-07-20	46	25–120	12.6 µg/m³	23h	3
2026-07-19	44	19–70	11.1 µg/m³	23h	3
2026-07-18	55	24–169	17.0 µg/m³	22h	3
2026-07-17	83	1–247	39.6 µg/m³	22h	3
2026-07-16	70	16–163	24.2 µg/m³	21h	3
2026-07-15	65	17–168	21.4 µg/m³	20h	2
2026-07-14	52	11–173	17.0 µg/m³	20h	3
2026-07-13	45	13–95	12.3 µg/m³	22h	3
2026-07-12	54	8–312	22.9 µg/m³	23h	2
2026-07-11	41	10–105	11.0 µg/m³	21h	2
2026-07-10	55	13–157	16.4 µg/m³	18h	2
2026-07-09	43	4–95	11.3 µg/m³	21h	2
2026-07-08	50	2–155	15.8 µg/m³	20h	2
2026-07-07	18	18–18	4.4 µg/m³	1h	3

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