Air Quality - Averages and Totals

Air Quality Graphs (PM 2.5) - Temperature Graphs - Averages - Back to Main Page

maartens-airquality.nl ➜ Information about this project

Air quality averages and totals calculated on Friday 12 Dec 12:42
	AQI Air Quality Index	PM2.5 µg/m³	Days with AQI >100	Days with AQI >150	Days with AQI >162	Days with AQI >175	Days with AQI >200
Note: Days are counted only when readings occurred 10 or more times on that day (equivalent to 30 minutes or more).
Last hour:	78	24	0	0	0	0	0
Last 2 hours:	69	19	0	0	0	0	0
Last 12 hours:	55	12	1	0	0	0	0
Last 24 hours:	67	18	2	0	0	0	0
Last 2 days: (last 48 hours)	61	15	2	0	0	0	0
Last 7 days:	78	24	5	3	3	1	1
Last 30 days:	76	23	22	16	10	6	2
Last 90 days:	63	16	41	24	12	7	2
Last year: (last 365 days)	57	13	113	75	48	28	4

Averages and totals per Academic Year
	AQI Air Quality Index	PM2.5 µg/m³	Days with AQI >100	Days with AQI >150	Days with AQI >162	Days with AQI >175	Days with AQI >200
Note: Days are counted only when readings occurred 10 or more times on that day (equivalent to 30 minutes or more).
Academic Year 2023-2024 August 2023 - July 2024	60	13.9	118 days 32%	65 days 18%	44 days 12%	20 days 5%	10 days 3%
Academic Year 2022-2023 August 2022 - July 2023	73	21.3	150 days 41%	97 days 27%	75 days 21%	52 days 14%	30 days 8%
Academic Year 2021-2022 August 2021 - July 2022	64	15.6	125 days 34%	74 days 20%	46 days 13%	20 days 5%	3 days 1%

AQI American Air Quality Index	Air Quality
0 - 50 PM2.5: 0 - 9 µg/m³	Very Good
51 - 75 PM2.5: 10 - 22 µg/m³	Good
76 - 100 PM2.5: 23 - 35 µg/m³	Moderate
101 - 150 PM2.5: 36 - 55 µg/m³	Unhealthy for children and other sensitive groups
151 - 200 PM2.5: 56 - 125 µg/m³	Unhealthy
201 - 300 PM2.5: 126 - 225 µg/m³	Very Unhealthy
301+ PM2.5: > 225 µg/m³	Hazardous