What is the air quality trend in Alphen aan den Rijn?

Over the past 21 days, Alphen aan den Rijn had an average AQI of 29 based on station measurements. The worst day was 2026-05-23 with AQI 71.

How is Alphen aan den Rijn air quality measured?

Air quality in Alphen aan den Rijn 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 Alphen aan den Rijn, Netherlands

Name: Alphen aan den Rijn Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Alphen aan den Rijn, Netherlands.

Current AQI
Moderate Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

471h

PM2.5 Station

471h · 2 stations

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	PM10 avg	Hours	Stations
2026-05-29	54	7–109	16.9 µg/m³	20.1	19h	2
2026-05-28	8	1–20	1.7 µg/m³	2.8	22h	2
2026-05-27	21	2–93	6.0 µg/m³	7.2	24h	2
2026-05-26	36	10–105	10.1 µg/m³	11.8	24h	3
2026-05-25	18	2–36	4.4 µg/m³	5.1	24h	3
2026-05-24	52	9–122	16.8 µg/m³	19.9	24h	3
2026-05-23	71	22–118	22.9 µg/m³	26.6	24h	3
2026-05-22	49	22–78	13.4 µg/m³	14.9	23h	3
2026-05-21	30	16–48	7.2 µg/m³	10.5	24h	3
2026-05-20	28	14–51	6.8 µg/m³	11.3	24h	3
2026-05-19	37	12–73	9.7 µg/m³	10.4	24h	3
2026-05-18	26	1–67	6.8 µg/m³	7.8	24h	3
2026-05-17	54	35–73	14.6 µg/m³	15.9	24h	3
2026-05-16	15	1–32	3.2 µg/m³	4.1	23h	2
2026-05-15	7	1–41	1.2 µg/m³	2.5	21h	2
2026-05-14	5	1–10	1.0 µg/m³	2.2	23h	2
2026-05-13	6	1–26	1.4 µg/m³	3.1	24h	2
2026-05-12	11	1–26	2.4 µg/m³	3.7	24h	2
2026-05-11	3	1–9	0.8 µg/m³	1.8	23h	2
2026-05-10	35	5–79	9.7 µg/m³	10.8	24h	3
2026-05-09	57	46–64	15.4 µg/m³	16.2	5h	3

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