What is the air quality trend in San Ildefonso?

Over the past 8 days, San Ildefonso had an average AQI of 82 based on station measurements. The worst day was 2026-05-27 with AQI 107.

How is San Ildefonso air quality measured?

Air quality in San Ildefonso 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 San Ildefonso, Philippines

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

Historical PM2.5 and AQI trend from monitoring stations near San Ildefonso, Philippines.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

168h

PM2.5 Station

168h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-30	55	27–67	15.3 µg/m³	17.4	10h	16
2026-05-29	84	67–95	27.7 µg/m³	25.7	24h	20
2026-05-28	104	87–128	36.5 µg/m³	43.0	24h	18
2026-05-27	107	87–135	37.6 µg/m³	32.9	24h	20
2026-05-26	92	66–108	31.5 µg/m³	24.8	24h	20
2026-05-25	72	57–100	21.9 µg/m³	14.6	24h	20
2026-05-24	68	51–97	20.1 µg/m³	18.6	24h	20
2026-05-23	81	35–109	26.3 µg/m³	28.9	14h	19

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