What is the air quality trend in San Marcelino?

Over the past 15 days, San Marcelino had an average AQI of 49 based on station measurements. The worst day was 2026-05-27 with AQI 111.

How is San Marcelino air quality measured?

Air quality in San Marcelino 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 Marcelino, Philippines

Name: San Marcelino 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 Marcelino, Philippines.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

328h

PM2.5 Station

328h · 3 stations

Temperature GFS model

56pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	37	35–41	8.9 µg/m³	8h	3
2026-06-08	49	38–59	12.1 µg/m³	24h	3
2026-06-07	48	38–63	12.0 µg/m³	24h	3
2026-06-06	36	24–47	8.6 µg/m³	23h	3
2026-06-05	30	19–48	7.2 µg/m³	24h	3
2026-06-04	16	5–35	4.0 µg/m³	24h	3
2026-06-03	18	10–25	4.3 µg/m³	24h	3
2026-06-02	17	6–39	4.1 µg/m³	24h	3
2026-06-01	15	8–22	3.6 µg/m³	21h	3
2026-05-31	45	20–61	11.3 µg/m³	24h	3
2026-05-30	50	34–79	13.1 µg/m³	24h	3
2026-05-29	75	62–85	23.5 µg/m³	24h	3
2026-05-28	101	72–129	35.1 µg/m³	22h	3
2026-05-27	111	94–132	39.6 µg/m³	24h	3
2026-05-26	96	85–106	33.3 µg/m³	14h	3

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