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Air quality measurements in the Netherlands 2024

RIVM Annual report

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Authors
Affiliation

Pleuni Bongers

National Institute for Public Health and the Environment (RIVM)

Dennis Mooibroek

Published

December 19, 2025

Note

Please note that this report is not definitive as not all statistics are available yet at the time of writing. The winter means for sulphur dioxide will be added in the final version.

1 Air quality monitoring network in the Netherlands

Air quality in the Netherlands is monitored by the National Air Quality Monitoring Network (LML), which is administered by the National Institute for Public Health and the Environment (RIVM) in collaboration with its regional partners. The resulting data provide a detailed picture of air quality and the concentrations of the various pollutants at the monitoring stations.

This annual report gives an overview of the key measurement values for specific pollutants in 2024 from measurements by RIVM and two of its regional partners DCMR Environmental Protection Agency (DCMR) and The Public Health Service of Amsterdam (GGD Amsterdam). Measurements are carried out under EN ISO/IEC 17025:2017 accreditation by RIVM under L224 in collaboration with its regional partners DCMR (L520) and GGD Amsterdam (L426) who are accredited according to the same ISO standard. Analysis of heavy metals is outsourced to an external analytical laboratory that is accredited according to EN ISO/IEC 17025:2017 under L086. See Appendix A for an overview of all the accreditation certificate numbers for the measurements in this report. Appendix A also includes an overview of ambient air quality limit values. Besides the current limit values from the 2008/50/EC and 2004/107/EC directives, this report will take into account the revised EU directive (2024/2881) on ambient air quality and cleaner air for Europe and, in some occasions, the Air Quality Guideline (AQG) levels from the World Health Organisation (WHO) reported in 2021.

The air quality monitoring sites have specific encoding for EU reporting, where all sites in the Netherlands start with NL, followed by 10 for RIVM sites (L224), 01 for DCMR measurement sites (L520) and 49 for sites from GGD Amsterdam (L426). The remaining 3 numbers denote the unique monitoring site. When hovering over the site codes in this report’s tables, the Dutch site name and location along with the responsible monitoring network will show up. For more information on the monitoring sites (including coordinates), monitoring instruments, and sampling practices, please consult the metadata on the LML data catalog on the public RIVM website. For additional information including measurement uncertainties, see the accompanying README.

2 Key concentration values per component

The upcoming tables contain the key statistics per component for 2024, where mean is the yearly averaged concentration - based on either hourly or daily (24-h) values, P50 and P98 denote the 50th and 98th percentile, max is the maximum measured concentration value, n is the number of valid data points in hours or days, % is the percentage of valid data, max.roll.24 denotes the maximum value of the rolling 24-h mean and max.roll.8 of the 8-h mean. All of these values are in µg/m³ unless otherwise specified and with the exception of values for lead, arsenic, cadmium, nickel and benzo(a)pyrene, which are in ng/m3. Columns that are colored in red indicate an exceedance of the EU limit values from 2008/50/EC or 2004/107/EC, orange represents an exceedance of the revised EU limit values from EU Directive 2024/2881. For several pollutants, additional columns have been added relating to component-specific target values. The summary tables where the annual means have been grouped by site type, only contain yearly averages where data capture meets EU requirements.

Most numbers in this report have been rounded to one decimal place and where deemed logical, to 0 or 2 decimal places. However, for testing against the limit values, the rounding practices of the limit values in the relevant EU Directives have been taken into account, of which most are a whole number. Key statistics rounded to more decimal places than in this report are available on the RIVM public data catalog for air quality measurements, as well as the underlying hourly and daily data.

For some pollutants, relevant statistics are also plotted on an interactive map to provide a quick overview of the concentration distribution throughout the Netherlands and compliance with limit values, and to view specific stations more easily. Every dot represents an individual station and clicking on it will bring up a pop-up with the site code and name, the responsible network, the site type, the component, and the relevant value for that component. Please note that the colors do not necessarily match the colors in the tables of the key statistics. Instead, where possible, the same color categories have been used as the European Environment Agency (EEA) applies in their maps for easier comparison with European data. Only stations with at least 85% of valid data have been included in the maps.

2.1 Nitrogen dioxide

In 2024, the nitrogen dioxide concentrations at all measurement locations were in compliance with the higher limit value applicable at the time. A more stringent limit value for nitrogen dioxide of 20 μg/m3 will enter into effect in 2030. Most monitoring stations near busy roads, for example in and around Amsterdam and Rotterdam, currently do not meet this limit value. None of the measured hours exceed the threshold of 200 µg/m³ that may not be exceeded more than 3 times per calendar year according to the new standard. A total of 15 sites meet the WHO guideline of a maximum annual average of 10 μg/m3.

Key statistics for NO2 in 2024
mean1 P50 P98 max median n % exc_2002 max.roll.24 max.roll.8
Rural Background

NL01497

14.8 8.9 66.3 117.1 8.9 6879 78.3 0 75.0 87.4

NL10107

9.7 7.9 29.7 71.8 7.9 8619 98.1 0 51.1 65.7

NL10131

10.3 8.1 32.0 65.3 8.1 8696 99.0 0 38.6 48.9

NL10133

7.6 6.0 25.5 70.1 6.0 8525 97.1 0 41.1 51.8

NL10230

11.4 8.7 37.1 175.0 8.7 8738 99.5 0 51.0 119.2

NL10235

11.2 9.0 37.0 81.9 9.0 8646 98.4 0 40.6 48.8

NL10246

11.2 9.1 33.8 76.3 9.1 8676 98.8 0 41.9 55.3

NL10248

10.9 8.5 33.7 88.8 8.5 8687 98.9 0 46.9 58.9

NL10301

9.7 7.3 33.8 69.1 7.3 8691 98.9 0 39.9 55.9

NL10318

9.8 7.0 35.1 74.8 7.0 8683 98.8 0 43.0 60.4

NL10437

11.7 9.4 36.5 68.3 9.4 8367 95.3 0 48.1 57.3

NL10444

9.5 7.2 35.1 63.6 7.2 8725 99.3 0 41.8 50.6

NL10538

10.1 6.2 43.0 121.6 6.2 8679 98.8 0 55.1 72.2

NL10617

7.2 5.7 24.0 46.3 5.7 8720 99.3 0 29.8 33.9

NL10633

9.6 7.6 31.2 66.7 7.6 8675 98.8 0 38.5 58.7

NL10644

10.8 8.7 32.1 68.9 8.7 8634 98.3 0 37.7 49.2

NL10722

8.6 7.0 26.2 55.4 7.0 8628 98.2 0 40.8 49.2

NL10738

8.8 7.1 26.8 95.0 7.1 8626 98.2 0 28.3 36.4

NL10807

7.6 6.3 22.8 43.1 6.3 7151 81.4 0 28.9 32.5

NL10818

6.9 5.7 21.4 42.6 5.7 8720 99.3 0 28.8 33.2

NL10918

6.1 4.7 22.3 47.5 4.7 8645 98.4 0 34.4 42.8

NL10929

6.1 5.0 20.1 40.6 5.0 8724 99.3 0 24.3 33.0

NL10934

5.2 4.2 16.6 47.9 4.2 8572 97.6 0 30.8 41.2

NL49680

9.2 7.2 30.7 47.2 7.2 6013 68.5 0 42.2 43.4

NL49703

12.9 9.8 43.2 70.7 9.8 8765 99.8 0 45.6 55.5
Urban Background

NL01485

18.8 15.3 56.0 107.4 15.3 8568 97.5 0 60.7 74.1

NL01488

17.8 14.3 56.8 124.3 14.3 8762 99.8 0 57.8 77.7

NL01494

22.6 19.5 61.2 120.0 19.5 8746 99.6 0 58.9 81.9

NL01495

23.9 21.1 61.9 116.1 21.1 8595 97.8 0 62.0 87.3

NL01912

18.2 15.4 48.7 95.7 15.4 8706 99.1 0 60.9 76.0

NL10138

9.6 7.4 31.1 72.5 7.4 8735 99.4 0 45.7 55.3

NL10241

13.6 10.8 42.4 78.8 10.8 8756 99.7 0 54.9 61.6

NL10247

10.5 8.2 33.8 55.0 8.2 8630 98.2 0 43.6 51.1

NL10404

17.9 13.6 59.8 97.2 13.6 8725 99.3 0 56.7 71.0

NL10418

20.1 16.9 54.8 102.3 16.9 8637 98.3 0 57.2 75.4

NL10442

13.7 11.1 41.1 114.4 11.1 8698 99.0 0 55.4 65.1

NL10446

17.0 13.4 52.6 99.7 13.4 8736 99.5 0 53.2 69.8

NL10643

12.8 10.2 38.4 75.4 10.2 8674 98.7 0 44.3 63.5

NL10742

14.3 11.7 41.8 77.3 11.7 8536 97.2 0 52.9 60.5

NL10938

6.4 5.1 20.6 54.9 5.1 8693 99.0 0 29.5 40.5

NL49003

14.7 12.0 45.1 79.0 12.0 8668 98.7 0 46.0 60.1

NL49014

15.3 12.7 44.2 87.6 12.7 8741 99.5 0 52.9 69.7

NL49019

18.2 15.2 50.7 94.1 15.2 8771 99.9 0 61.2 72.5

NL49021

13.2 10.8 38.9 75.6 10.8 8733 99.4 0 40.6 55.5

NL49022

14.4 11.2 45.6 97.0 11.2 8749 99.6 0 50.5 66.8

NL49701

15.4 11.7 49.3 79.5 11.7 8745 99.6 0 50.4 63.4
Roadside

NL01487

26.9 23.6 65.9 123.7 23.6 7630 86.9 0 71.0 90.9

NL01489

22.7 20.3 57.6 100.6 20.3 8700 99.0 0 65.1 85.9

NL01491

24.0 21.0 62.1 92.8 21.0 8761 99.7 0 61.1 85.4

NL01493

25.1 22.1 62.4 121.7 22.1 8764 99.8 0 66.9 89.5

NL10136

15.0 12.7 43.7 75.0 12.7 8768 99.8 0 48.8 60.7

NL10236

14.6 12.2 40.5 65.3 12.2 8550 97.3 0 50.9 55.8

NL10237

17.1 14.9 46.0 69.0 14.9 8504 96.8 0 51.8 57.9

NL10240

20.4 18.1 52.3 93.5 18.1 8711 99.2 0 62.4 70.3

NL10445

20.9 17.9 57.6 104.5 17.9 8729 99.4 0 54.4 83.1

NL10449

24.5 21.6 61.3 99.8 21.6 8619 98.1 0 58.6 75.7

NL10450

25.3 22.9 64.9 104.0 22.9 8579 97.7 0 62.9 89.3

NL10550

15.7 13.2 45.6 87.7 13.2 8645 98.4 0 50.3 62.0

NL10636

15.7 13.3 44.3 88.2 13.3 8752 99.6 0 51.3 69.8

NL10639

18.1 15.3 50.2 85.6 15.4 8738 99.5 0 52.2 64.8

NL10641

16.8 14.7 42.7 69.0 14.7 8732 99.4 0 50.5 57.2

NL10741

19.6 17.1 50.8 91.2 17.1 8746 99.6 0 56.8 67.8

NL10937

14.4 12.6 38.2 75.3 12.6 8671 98.7 0 46.8 58.1

NL49002

25.1 22.8 59.9 94.9 22.8 8769 99.8 0 64.4 71.6

NL49007

29.8 27.2 71.6 107.3 27.2 8774 99.9 0 74.5 84.7

NL49012

21.7 18.8 58.5 106.6 18.8 8609 98.0 0 66.8 81.9

NL49017

21.4 18.9 52.6 100.3 18.9 8743 99.5 0 65.5 80.8

NL49020

24.4 21.4 62.1 105.8 21.4 8565 97.5 0 71.7 86.9
Industrial

NL01496

22.4 19.5 66.9 147.5 19.5 8644 98.4 0 76.4 108.2

NL01913

14.0 11.0 45.9 87.9 11.0 8749 99.6 0 50.0 58.2

NL49704

21.1 17.3 60.8 97.3 17.3 8671 98.7 0 55.0 69.5
* Hovering over the station code will show the site name, location and responsible monitoring network
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the future EU limit value from 01-01-2030 (2024/2881/EC)
and red of the current EU limit value (2008/50/EC)
2 Number of hours where concentrations exceed 200 µg/m³
- Color indicates exceedance of > 3 times (orange) or > 18 times (red) per calendar year
Table 1: Key concentration values for nitrogen dioxide in 2024 (in μg/m3)
Annual NO2 means per station type in 2024
type mean n
Rural Background 9.3 22
Urban Background 15.6 21
Roadside 20.6 21
Industrial 19.2 3
Table 2: Summary table for nitrogen dioxide in 2024 (in μg/m3)

2.2 Particulate matter

Concentrations of particulate matter in 2024 were in compliance with the European limit values for PM10 and PM2.5 applicable at that time. Most sites also meet the revised PM limit values from the EU directive. The majority of sites do not meet the WHO air quality guidelines for particulate matter, except for PM10 for most rural background sites.

Key statistics for PM10 in 2024
mean1 P50 P98 max median n % exc_50_d2
Rural Background

NL01497

14.2 12.6 33.4 41.0 12.6 357 97.5 0

NL10131

15.1 13.1 34.7 55.6 13.1 358 97.8 1

NL10133

13.3 11.9 29.1 39.3 11.9 365 99.7 0

NL10230

14.6 13.1 32.6 39.0 13.1 362 98.9 0

NL10235

14.3 12.9 30.6 40.7 12.9 358 97.8 0

NL10246

13.4 12.2 30.4 39.1 12.2 357 97.5 0

NL10248

13.0 11.4 28.5 42.8 11.4 362 98.9 0

NL10318

14.2 12.7 32.4 50.2 12.7 358 97.8 0

NL10437

13.7 12.6 29.6 44.8 12.6 345 94.3 0

NL10444

14.0 12.5 32.6 47.4 12.5 357 97.5 0

NL10538

13.0 11.7 29.1 33.1 11.8 360 98.4 0

NL10617

12.6 11.0 28.6 36.3 11.0 359 98.1 0

NL10633

12.9 11.5 27.9 43.3 11.6 354 96.7 0

NL10644

14.1 13.0 31.3 44.3 13.0 366 100.0 0

NL10722

13.6 12.7 28.2 38.8 12.7 357 97.5 0

NL10738

14.5 13.0 31.0 37.9 13.0 366 100.0 0

NL10807

13.4 11.8 32.1 41.8 11.8 348 95.1 0

NL10818

13.1 11.4 32.0 37.7 11.4 363 99.2 0

NL10918

11.5 10.0 28.5 32.5 10.0 360 98.4 0

NL10929

12.2 10.6 27.7 39.5 10.6 359 98.1 0

NL10934

13.0 11.2 32.5 41.2 11.2 355 97.0 0

NL49680

13.7 12.6 30.1 43.5 12.6 252 68.9 0

NL49703

14.6 12.9 32.1 48.2 12.9 366 100.0 0
Urban Background

NL01485

16.4 13.8 36.9 133.6 13.8 358 97.8 1

NL01488

15.9 14.0 34.1 55.7 14.0 366 100.0 1

NL01494

16.5 14.7 34.3 48.3 14.7 366 100.0 0

NL01495

14.8 13.0 33.7 46.6 13.0 366 100.0 0

NL01912

15.4 13.4 33.6 47.7 13.4 364 99.5 0

NL10138

14.3 13.3 32.8 50.1 13.3 344 94.0 0

NL10241

16.9 14.9 36.6 53.1 15.0 362 98.9 1

NL10247

15.8 14.2 34.2 47.7 14.2 361 98.6 0

NL10404

16.9 15.2 37.9 60.2 15.2 365 99.7 1

NL10418

18.1 16.7 39.1 50.6 16.7 363 99.2 1

NL10442

14.8 13.5 31.1 40.6 13.5 366 100.0 0

NL10446

14.0 12.9 30.7 48.3 12.9 312 85.2 0

NL49014

15.8 14.3 31.1 43.8 14.3 358 97.8 0

NL49016

15.1 13.5 30.7 45.0 13.5 361 98.6 0

NL49701

14.7 13.5 29.8 44.8 13.5 366 100.0 0
Roadside

NL01487

17.4 15.4 36.8 47.7 15.4 366 100.0 0

NL01489

16.5 14.6 35.0 46.8 14.6 364 99.5 0

NL01491

16.8 14.8 37.8 57.8 14.8 366 100.0 1

NL01493

16.3 14.4 33.6 46.1 14.4 366 100.0 0

NL10136

13.8 12.5 33.2 47.8 12.5 363 99.2 0

NL10236

15.5 13.8 32.7 40.2 13.8 338 92.3 0

NL10237

17.4 15.9 35.6 45.9 15.9 354 96.7 0

NL10240

15.8 14.6 32.2 48.4 14.6 357 97.5 0

NL10445

17.6 16.1 37.4 50.7 16.1 363 99.2 1

NL10449

19.2 17.3 41.7 63.7 17.3 362 98.9 2

NL10450

19.0 17.1 40.7 54.7 17.1 359 98.1 1

NL10550

17.6 15.7 39.4 60.4 15.8 362 98.9 1

NL10636

14.7 13.3 31.2 40.9 13.3 360 98.4 0

NL10639

15.9 14.5 33.8 48.4 14.5 365 99.7 0

NL10641

14.0 12.8 29.3 41.1 12.8 354 96.7 0

NL10741

16.9 15.6 35.4 43.3 15.6 365 99.7 0

NL10937

16.9 14.9 39.6 49.1 14.9 357 97.5 0

NL49007

17.2 15.6 34.1 45.7 15.6 363 99.2 0

NL49012

15.6 14.2 32.0 43.9 14.3 366 100.0 0

NL49017

13.5 12.3 27.6 37.9 12.3 356 97.3 0

NL49020

15.2 13.9 32.3 45.5 13.9 359 98.1 0
Industrial

NL01496

16.3 14.3 35.6 50.3 14.4 366 100.0 0

NL01913

17.8 15.1 43.9 48.5 15.2 366 100.0 0

NL49557

18.6 17.7 33.6 41.4 17.7 351 95.9 0

NL49704

13.6 12.0 28.5 39.7 12.0 366 100.0 0
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the future EU limit value from 01-01-2030 (2024/2881/EC)
and red of the current EU limit value (2008/50/EC)
2 Number of days where concentrations exceed 50 µg/m³
- Red color indicates exceedance of > 35 times per calendar year
Table 3: Key concentration values for PM10 in 2024 (in μg/m3)
Annual PM10 means per station type in 2024
type mean n
Rural Background 13.6 22
Urban Background 15.8 14
Roadside 16.3 21
Industrial 16.6 4
Table 4: Summary table for PM10 in 2024 (in μg/m3)
Key statistics for PM2.5 in 2024
mean1 P50 P98 max median n %
Rural Background

NL01497

7.7 6.1 24.4 31.3 6.1 357 97.5

NL10131

8.6 7.4 22.3 28.2 7.4 345 94.3

NL10230

10.6 9.5 25.3 36.0 9.5 361 98.6

NL10248

9.9 8.8 26.5 34.0 8.8 331 90.4

NL10444

7.1 6.1 22.1 27.1 6.1 358 97.8

NL10538

6.8 5.9 19.6 25.2 5.9 355 97.0

NL10644

8.8 7.9 23.3 30.4 7.9 339 92.6

NL10738

7.6 6.3 22.4 28.4 6.3 361 98.6

NL10934

6.2 5.2 19.9 27.3 5.2 348 95.1

NL49680

7.8 6.5 21.8 34.3 6.5 252 68.9

NL49703

8.1 6.5 23.5 37.4 6.5 366 100.0
Urban Background

NL01485

8.6 6.7 25.9 32.1 6.7 358 97.8

NL01488

8.6 7.0 24.2 34.0 7.1 366 100.0

NL01494

8.8 7.1 25.3 33.5 7.1 366 100.0

NL01495

8.0 6.4 25.3 31.1 6.4 366 100.0

NL01912

8.5 6.8 22.7 33.8 6.8 364 99.5

NL10138

7.4 6.3 22.8 35.3 6.3 356 97.3

NL10241

9.8 8.3 24.2 31.7 8.4 354 96.7

NL10247

9.4 8.3 25.8 35.5 8.3 315 86.1

NL10404

7.4 5.7 25.6 30.6 5.7 341 93.2

NL10418

7.8 6.5 22.1 29.0 6.5 350 95.6

NL10643

9.3 8.5 23.1 28.2 8.6 362 98.9

NL10742

8.2 7.0 22.4 25.9 7.0 358 97.8

NL10821

6.1 4.7 19.8 26.2 4.7 335 91.5

NL10938

6.3 4.9 23.8 31.3 4.9 333 91.0

NL49014

8.6 7.6 23.0 33.5 7.6 361 98.6

NL49016

8.5 6.5 23.7 36.3 6.5 351 95.9

NL49701

8.2 6.6 23.3 34.8 6.6 366 100.0
Roadside

NL01487

9.5 7.9 26.0 32.8 8.0 366 100.0

NL01489

8.7 6.9 25.3 33.3 7.0 364 99.5

NL01491

8.8 7.0 25.9 33.8 7.0 366 100.0

NL01493

8.4 6.8 24.2 31.8 6.8 366 100.0

NL10136

7.0 5.7 21.8 36.8 5.7 344 94.0

NL10240

8.1 6.6 24.1 30.8 6.6 359 98.1

NL10449

8.9 7.6 26.2 61.4 7.6 359 98.1

NL10450

9.6 8.2 26.4 30.5 8.2 363 99.2

NL10636

9.2 8.1 23.2 31.0 8.1 360 98.4

NL10641

10.1 8.7 25.4 32.1 8.7 363 99.2

NL10741

10.5 9.8 24.8 27.7 9.9 356 97.3

NL10937

7.7 6.7 19.5 28.5 6.7 358 97.8

NL49007

8.8 7.5 22.9 34.4 7.5 355 97.0

NL49012

8.5 6.7 23.2 35.3 6.7 366 100.0

NL49017

10.1 8.7 23.0 34.7 8.7 362 98.9
Industrial

NL01496

9.0 7.1 28.1 34.4 7.1 366 100.0

NL01913

9.8 7.7 31.8 35.7 7.7 366 100.0

NL49557

10.0 8.9 25.3 32.4 8.9 351 95.9

NL49704

7.5 6.2 21.9 31.6 6.2 366 100.0
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the future EU limit value from 01-01-2030 (2024/2881/EC)
and red of the current EU limit value (2008/50/EC)
Table 5: Key concentration values for PM2.5 in 2024 (in μg/m3)
Annual PM2.5 means per station type in 2024
type mean n
Rural Background 8.2 10
Urban Background 8.1 16
Roadside 8.9 15
Industrial 9.1 4
Table 6: Summary table for PM2.5 in 2024 (in μg/m3)
Statistics to determine the AEI for PM2.5
2022 2023 2024 average_3y
Urban Background

NL01494

10.0 8.7 8.8 9.2

NL10138

7.5 6.5 7.4 7.1

NL10247

10.6 10.2 - 10.4

NL10404

7.4 6.9 7.4 7.2

NL10418

8.9 7.8 7.8 8.1

NL10643

10.4 7.5 9.3 9.1

NL10742

10.0 8.4 8.2 8.9

NL10821

7.4 7.2 6.1 6.9

NL10938

8.2 6.0 6.3 6.8

NL49014

9.6 7.8 8.6 8.7

NL49701

9.2 8.8 8.2 8.7

NL10241

- 7.7 9.8 8.7
* A hyphen is used in case of insufficient valid data to provide an annual mean
Table 7: Annual means for PM2.5 (in μg/m3) on selected urban background sites and the 3-year average to determine the Average Exposure Indicator (AEI)

The Average Exposure Indicator (AEI) for PM2.5 assesses the general population’s long-term exposure to fine particles in urban areas and is based on a 3-year average measured at urban background stations. The AEI in year 2024 is 8.3 µg/m³.

Key statistics for UFP in 2024
mean P50 P98 max median n % max.roll.24 max.roll.8
Rural Background

NL49680

5294 5100 11670 21540 5100 4141 47.1 10827 13739
Urban Background

NL01494

13366 11874 34313 59997 11874 7778 88.5 36808 40885

NL49022

12282 9230 42980 208690 9230 6882 78.3 81688 133404
Rows where the text is greyed out indicates a data capture < 85%
Table 8: Key concentration values for UFP in 2024 (in number of particles/cm3)

2.3 Sulphur dioxide

Yearly averaged sulphur dioxide concentrations are all well below the limit value of 20 µg/m³. Only for site NL01484, there were 3 measured hours exceeding the threshold of 350 µg/m³ that may not be exceeded more than 3 times per calendar year according to the new standard.

Key statistics for SO2 in 2024
mean1 P50 P98 max median n % exc_350_h2 max.roll.24 max.roll.8 exc_125_d3
Rural Background

NL10133

0.3 0.2 1.8 14.9 0.2 8520 97.0 0 5.6 9.2 0

NL10318

0.7 0.3 4.2 38.2 0.3 8340 94.9 0 7.8 13.6 0

NL10444

0.5 0.3 2.5 45.1 0.3 8513 96.9 0 8.9 23.8 0

NL10644

0.5 0.3 2.2 35.3 0.3 8544 97.3 0 5.2 13.0 0

NL10722

0.5 0.2 3.4 49.2 0.2 8671 98.7 0 12.5 31.1 0

NL10934

0.4 0.2 1.8 24.1 0.2 8604 98.0 0 5.9 14.8 0
Urban Background

NL01485

1.0 0.6 5.8 39.3 0.6 8484 96.6 0 9.4 15.8 0

NL49016

0.7 0.5 3.1 41.6 0.5 8660 98.6 0 7.9 22.1 0
Industrial

NL01484

2.5 1.5 14.8 269.6 1.5 8604 98.0 0 52.6 123.0 0

NL01496

1.2 0.9 5.4 28.9 0.9 8736 99.5 0 10.1 13.1 0

NL49704

1.0 0.7 3.6 54.6 0.7 8764 99.8 0 10.1 26.0 0
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the yearly limit value of 20 µg/m³ (2024/2881/EC)
2 Number of hours where concentrations exceed 350 µg/m³
- Color indicates exceedance of > 3 times (orange) or > 24 times (red) per calendar year
3 Number of days where concentrations exceed 125 µg/m³
- Red color indicates exceedance of > 3 times per calendar year
Table 9: Key concentration values for sulphur dioxide in 2024 (in μg/m3)
Annual SO2 means per station type in 2024
type mean n
Rural Background 0.5 6
Urban Background 0.9 2
Industrial 1.6 3
Table 10: Summary table for sulphur dioxide in 2024 (in μg/m3)

2.4 Ozone

For ozone, there is no limit value based on the annual mean, instead the number of days where the maximum daily rolling 8-h mean of ozone concentrations exceed 120 µg/m³ is assessed. For the long-term objective, this may not be exceeded on any day. The target value for the protection of human health takes into account data that is averaged over three years. Until 1 January 2030, 120 µg/m³ may not be exceeded on more than 25 days per calendar year averaged over three years and thereafter, it’s set to a maximum of 18 days. See Table 13 for the number of exceedance days in 2022, 2023 and 2024 and their 3-year averages.

In addition, the number of days on which at least one exceedance of the information or alert threshold value is observed, is shown in the columns exc_info and exc_alert in the table below. The information threshold for ozone is 180 µg/m³ for one-hour ozone concentrations and the alert threshold for ozone is 240 µg/m³ for one-hour ozone concentrations.

The ‘Accumulated Ozone exposure over a Threshold of 40 parts per billion’ (AOT40), expressed in (µg/m³) × hours, means the sum of the difference between hourly concentrations greater than 80 µg/m³ (= 40 parts per billion) and 80 µg/m³ over a given period using only the 1-hour values measured between 8:00 and 20:00 Central European Time (CET) each day (EU Directive 2024/2881). The target value for AOT40 is 18000 µg/m³ x h averaged over 5 years. Note that the aot40 values in the table are only for the year 2024 and based on measurements from May up to and including July.

Another widely used ozone indicator for health impact assessment recommended by WHO called somo35 is given in the table. This represents the sum of all daily maximum 8 hour moving averages over 35 ppb - equivalent to 70 µg/m³.

Key statistics for O3 in 2024
mean P50 P98 max median n % max.roll.24 max.roll.8 exc_1201 exc_info2 exc_alert3 aot404 somo355
Rural Background

NL10107

49.3 49.2 107.1 172.8 49.2 8676 98.8 102.6 151.6 10 0 0 8655.6 3025.0

NL10131

49.1 49.1 108.7 167.0 49.1 8575 97.6 96.9 148.6 10 0 0 9017.9 3016.6

NL10230

50.8 50.7 109.5 161.6 50.7 8623 98.2 104.5 145.3 9 0 0 9338.3 3127.5

NL10235

45.4 45.7 96.8 168.1 45.7 8594 97.8 94.5 141.2 6 0 0 5435.0 2104.3

NL10301

57.3 58.8 101.1 177.6 58.8 8575 97.6 104.2 150.2 10 0 0 7104.8 3433.4

NL10318

53.5 54.1 101.7 170.7 54.2 8614 98.1 103.0 156.6 10 0 0 7492.1 3022.9

NL10437

50.5 50.9 99.5 161.5 50.9 8348 95.0 91.8 139.6 5 0 0 6039.4 2461.5

NL10444

58.0 60.1 106.8 161.6 60.1 8613 98.1 106.0 139.6 10 0 0 8779.6 3977.6

NL10538

60.4 61.3 102.2 151.8 61.3 8607 98.0 104.0 138.0 3 0 0 7864.1 3598.6

NL10617

55.4 54.8 104.8 153.9 54.8 8503 96.8 100.8 141.8 6 0 0 9071.5 3527.6

NL10633

51.1 50.7 103.0 158.7 50.7 8602 97.9 97.7 137.9 5 0 0 7254.5 2718.6

NL10644

49.4 49.2 103.2 162.8 49.2 8565 97.5 96.2 138.6 5 0 0 6757.3 2614.6

NL10722

46.4 44.6 110.7 169.3 44.6 8644 98.4 99.8 148.7 9 0 0 8466.4 2705.8

NL10738

53.1 52.9 115.2 162.8 52.9 8594 97.8 104.0 150.8 16 0 0 11129.2 3767.9

NL10807

51.4 50.9 109.4 161.0 50.9 8425 95.9 112.0 141.9 8 0 0 9552.1 3069.7

NL10818

54.5 54.0 106.3 151.8 54.0 8659 98.6 113.9 146.0 8 0 0 8373.3 3192.6

NL10918

57.1 57.7 101.4 155.3 57.7 8540 97.2 107.7 141.1 2 0 0 7639.8 2876.2

NL10929

53.3 53.3 107.8 174.4 53.3 8665 98.6 99.1 147.7 4 0 0 9068.7 3312.8

NL10934

57.1 57.9 98.5 151.4 57.9 8624 98.2 105.7 132.4 2 0 0 5987.2 2849.2
Suburban Background

NL10133

48.4 50.0 105.0 173.7 50.0 8620 98.1 102.5 149.0 10 0 0 7818.2 2668.4

NL10247

51.9 51.7 112.2 182.8 51.7 8395 95.6 109.2 151.3 16 1 0 8926.7 3378.7

NL10938

57.3 57.7 106.7 169.9 57.7 8668 98.7 112.6 150.4 5 0 0 8473.0 3562.7
Urban Background

NL01485

46.6 47.4 93.3 140.1 47.4 8571 97.6 85.9 122.8 1 0 0 3208.4 1819.9

NL01494

44.8 45.6 96.9 154.9 45.6 8745 99.6 95.3 132.7 6 0 0 4265.6 1929.0

NL01495

45.1 45.3 96.8 146.4 45.3 8731 99.4 95.9 129.7 2 0 0 4495.9 1873.9

NL10138

49.5 51.1 103.4 168.4 51.1 8674 98.7 98.9 144.0 8 0 0 7264.6 2616.0

NL10241

51.9 52.0 111.2 163.3 52.0 8674 98.7 108.4 151.3 14 0 0 9554.9 3533.6

NL10404

55.9 58.0 105.5 170.7 58.0 8669 98.7 106.9 148.8 8 0 0 7751.7 3709.7

NL10418

51.0 51.9 103.5 153.6 51.9 8467 96.4 101.7 136.4 6 0 0 6181.4 2832.4

NL10442

50.9 50.8 107.3 169.4 50.8 8537 97.2 106.1 145.3 12 0 0 8498.7 3173.6

NL10446

52.5 54.6 106.3 161.6 54.6 8674 98.7 108.5 139.7 11 0 0 7873.5 3426.7

NL10643

53.5 53.2 109.3 190.0 53.2 8597 97.9 104.1 153.8 10 1 0 9539.7 3643.8

NL10742

48.8 48.0 106.5 179.7 48.0 8552 97.4 102.5 140.7 8 0 0 7963.4 2762.7

NL49003

51.0 51.8 93.1 122.8 51.8 8768 99.8 91.0 115.8 0 0 0 3556.7 1889.6

NL49014

53.1 53.1 109.4 171.9 53.1 8648 98.5 116.4 150.4 9 0 0 9287.5 3375.1
Roadside

NL01493

42.3 42.9 93.2 152.3 42.9 8735 99.4 92.2 132.6 1 0 0 2884.5 1434.8

NL10236

51.0 51.0 109.6 166.9 51.0 8521 97.0 113.4 152.0 12 0 0 8360.6 2973.3

NL10449

44.1 44.7 99.4 161.0 44.7 8622 98.2 142.3 132.0 8 0 0 5474.4 2157.8

NL10450

46.8 47.8 95.8 152.5 47.8 8608 98.0 102.4 133.6 4 0 0 4070.5 1960.7

NL10550

52.3 54.2 97.2 152.8 54.2 8603 97.9 97.3 128.4 3 0 0 5095.4 2459.7

NL10636

52.4 52.8 95.8 132.8 52.8 3170 36.1 95.7 120.4 0 0 0 1731.5 2222.2

NL10639

46.6 46.4 98.3 162.4 46.4 8652 98.5 95.4 131.9 4 0 0 5412.9 2085.3

NL10641

47.0 46.8 99.2 159.1 46.8 8651 98.5 94.3 131.2 5 0 0 5442.4 1944.9

NL49012

54.0 55.1 99.8 164.7 55.1 7511 85.5 99.6 126.0 3 0 0 5643.8 2905.6
Industrial

NL01496

49.2 50.3 97.4 142.3 50.3 8745 99.6 99.0 123.8 2 0 0 4326.7 2149.1
Rows where the text is greyed out indicates a data capture < 85%
1 Number of days where the maximum daily rolling 8-h mean of ozone concentrations exceed 120 µg/m³
- Orange color indicates exceedance of > 18 times per calendar year
2 Number of days on which at least one exceedance of the threshold value for information of the public is observed
(one-hour ozone concentration > 180 µg/m³ (information threshold))
3 Number of days on which at least one exceedance of the threshold value for alerting the public is observed
(one-hour ozone concentration > 240 µg/m³ (alert threshold))
4 Accumulated amount of Ozone over the Threshold value of 40 ppb (May - July), related to vegetation [µg/m³ h]
- Blue color indicates exceedance of 18000 [µg/m³ h]
5 Sum of max. 8 hour moving averages > 35 ppb or 70 [µg/m³ d] (WHO)
Table 11: Key concentration values for ozone in 2024 (in μg/m3)
Annual O3 means per station type in 2024
type mean n
Rural Background 52.8 19
Suburban Background 52.5 3
Urban Background 50.3 13
Roadside 47.2 7
Industrial 49.2 1
Table 12: Summary table for ozone in 2024 (in μg/m3)

None of the sites surpass the current target value of 25 or the future threshold of 18 times exceedance days per calendar year, averaged over 3 years (see the table below).

Number of exceedance days for O3
2022 2023 2024 average_3y1
Rural Background

NL10107

19 15 10 15

NL10131

14 17 10 14

NL10230

18 18 9 15

NL10301

13 16 10 13

NL10318

13 16 10 13

NL10437

14 14 5 11

NL10444

15 18 10 14

NL10538

12 11 3 9

NL10617

7 15 6 9

NL10633

12 12 5 10

NL10644

13 16 5 11

NL10722

17 17 9 14

NL10738

19 19 16 18

NL10807

8 16 8 11

NL10818

10 13 8 10

NL10918

8 10 2 7

NL10929

12 11 4 9

NL10235

- 15 6 10

NL10934

- 10 2 6
Suburban Background

NL10133

14 15 10 13

NL10247

12 21 16 16

NL10938

5 11 5 7
Urban Background

NL01485

7 13 1 7

NL01494

8 13 6 9

NL01495

10 10 2 7

NL10138

19 21 8 16

NL10404

13 16 8 12

NL10418

12 15 6 11

NL10442

17 16 12 15

NL10446

14 18 11 14

NL10643

15 17 10 14

NL10742

14 22 8 15

NL49003

12 16 0 9

NL49014

12 19 9 13

NL10241

- 18 14 16
Roadside

NL10236

12 13 12 12

NL10449

8 15 8 10

NL10550

11 9 3 8

NL10636

11 14 - 12

NL10639

10 16 4 10

NL10641

11 12 5 9

NL49012

5 10 3 6

NL01493

- 4 1 2

NL10450

- 4 4 4
Industrial

NL01496

10 3 2 5
* A hyphen is used in case of insufficient valid data to provide an annual mean
1 Number of days averaged over 3 years where the maximum daily rolling 8-h mean of ozone concentrations exceed 120 µg/m³
- Orange color indicates exceedance of > 18 times per calendar year and red of > 25 times per calendar year
Table 13: Number of days where the maximum daily rolling 8-h mean of ozone concentrations exceed 120 µg/m³ in 2022, 2023 and 2024

2.5 Carbon monoxide

Maximum daily 8-hour means of carbon monoxide concentrations measured on three sites in Amsterdam did not surpass the limit value of 10000 µg/m³ on any day in 2024.

Key statistics for CO in 2024
mean1 P50 P98 max median n % max.roll.24 max.roll.8 exc_100002
Urban Background

NL49014

277.1 284.3 470.5 1233.7 284.3 8595 97.8 504.9 579.0 0
Roadside

NL49007

316.5 291.3 653.9 1117.6 291.4 8748 99.6 746.3 921.3 0

NL49012

388.9 371.5 665.4 1062.2 371.5 8550 97.3 722.8 857.9 0
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the future EU limit value from 01-01-2030 (2024/2881/EC)
and red of the current EU limit value (2008/50/EC)
2 Number of days where the maximum daily 8 hour mean concentrations exceed 10000 µg/m³
- Red color indicates an exceedance of at least 1 time per calendar year
Table 14: Key concentration values for carbon monoxide in 2024 (in μg/m3)
Annual CO means per station type in 2024
type mean n
Urban Background 277.1 1
Roadside 352.7 2
Table 15: Summary table for carbon monoxide in 2024 (in μg/m3)

2.6 Black carbon

There currently is no limit value for black carbon as the evidence base is not yet sufficient enough to provide a basis for legally binding limit values (WHO, 2021).

Key statistics for BC in 2024
mean P50 P98 max median n % max.roll.24 max.roll.8
Rural Background

NL10131

0.5 0.4 1.6 12.7 0.4 8697 99.0 2.3 2.9

NL10444

0.4 0.3 1.6 3.2 0.3 8640 98.4 2.5 2.4

NL10633

0.4 0.3 1.6 11.8 0.3 8610 98.0 2.1 2.7

NL10644

0.5 0.4 2.0 9.3 0.4 8613 98.1 2.0 2.8

NL10807

0.4 0.3 1.3 3.0 0.3 3724 42.4 1.4 1.9

NL10929

0.4 0.3 1.4 7.9 0.3 6563 74.7 1.9 2.4
Urban Background

NL10138

0.5 0.4 2.4 8.8 0.4 8772 99.9 4.5 7.1

NL10247

0.6 0.4 2.5 8.4 0.4 8682 98.8 3.4 4.2

NL10742

0.6 0.4 1.8 13.2 0.4 8722 99.3 2.8 7.2

NL10821

0.5 0.3 1.9 7.1 0.3 8742 99.5 5.7 3.5

NL10938

0.4 0.2 1.3 5.9 0.2 8775 99.9 2.4 3.5

NL49003

0.5 0.4 1.7 5.7 0.4 8775 99.9 1.9 3.3

NL49014

0.5 0.4 1.6 3.5 0.4 8588 97.8 2.0 2.4

NL49701

0.6 0.4 2.1 7.8 0.4 8776 99.9 2.7 3.2
Roadside

NL01493

1.1 0.9 3.5 11.1 0.9 8659 98.6 3.2 4.5

NL10237

0.9 0.7 2.6 7.9 0.7 8647 98.4 2.9 4.4

NL10641

0.6 0.5 1.8 7.7 0.5 8595 97.8 1.9 2.3

NL10741

0.8 0.7 2.3 10.9 0.7 8761 99.7 2.6 3.8

NL49007

0.8 0.7 2.4 9.3 0.7 8752 99.6 2.8 3.3

NL49012

0.7 0.6 2.1 6.1 0.6 8716 99.2 2.4 2.9

NL49017

0.7 0.6 1.9 3.7 0.6 8696 99.0 2.2 3.0

NL49020

0.8 0.6 2.2 10.2 0.6 8764 99.8 3.0 3.3
Rows where the text is greyed out indicates a data capture < 85%
Table 16: Key concentration values for black carbon in 2024 (in μg/m3)
Annual BC means per station type in 2024
type mean n
Rural Background 0.5 4
Urban Background 0.5 8
Roadside 0.8 8
Table 17: Summary table for black carbon in 2024 (in μg/m3)

2.7 Volatile organic compounds

All of the measured annual benzene concentrations were in compliance with the European limit values and also below the WHO AQG of 1.7 µg/m³. For toluene there is no legally binding limit value. Other VOCs are also measured by the LML, but are excluded from this report.

Key statistics for benzene in 2024
mean1 P50 P98 max median n %
Rural Background

NL49703

0.3 0.2 1.0 2.6 0.2 354 96.7
Urban Background

NL01485

0.3 0.3 0.8 1.8 0.3 207 56.6

NL01494

0.7 0.6 1.3 1.5 0.6 174 47.5

NL01495

0.5 0.4 1.3 9.4 0.4 365 99.7

NL10643

0.3 0.2 0.7 0.8 0.2 310 84.7
Roadside

NL49017

0.3 0.3 0.8 1.2 0.3 330 90.2
Industrial

NL01484

0.6 0.5 2.2 5.9 0.5 362 98.9

NL01496

0.4 0.3 1.0 1.3 0.3 359 98.1

NL49557

0.2 0.1 0.6 1.0 0.1 327 89.3

NL49704

0.5 0.4 1.7 2.1 0.4 351 95.9
Rows where the text is greyed out indicates a data capture < 85%
1 Orange color indicates exceedance of the future EU limit value from 01-01-2030 (2024/2881/EC)
and red of the current EU limit value (2008/50/EC)
Table 18: Key concentration values for benzene in 2024 (in μg/m3)
Annual benzene means per station type in 2024
type mean n
Rural Background 0.3 1
Urban Background 0.5 1
Roadside 0.3 1
Industrial 0.5 3
Table 19: Summary table for benzene in 2024 (in μg/m3)
Key statistics for toluene in 2024
mean P50 P98 max median n %
Rural Background

NL49703

0.6 0.3 3.9 8.1 0.3 354 96.7
Urban Background

NL01485

0.7 0.6 2.0 3.5 0.6 207 56.6

NL01494

2.0 1.8 5.3 6.3 1.8 174 47.5

NL01495

0.8 0.7 2.5 7.1 0.7 366 100.0

NL10643

0.5 0.4 1.4 2.1 0.4 310 84.7
Roadside

NL49017

1.0 0.8 2.5 7.3 0.9 330 90.2
Industrial

NL01484

0.8 0.6 2.3 15.7 0.6 362 98.9

NL01496

0.5 0.4 1.7 2.8 0.4 360 98.4

NL49557

0.2 0.1 0.8 1.4 0.1 327 89.3

NL49704

1.5 1.0 6.8 11.6 1.0 351 95.9
Rows where the text is greyed out indicates a data capture < 85%
Table 20: Key concentration values for toluene in 2024 (in μg/m3)
Annual toluene means per station type in 2024
type mean n
Rural Background 0.6 1
Urban Background 0.8 1
Roadside 1.0 1
Industrial 1.0 3
Table 21: Summary table for toluene in 2024 (in μg/m3)

2.8 Heavy metals

The measurements of lead, arsenic, cadmium and nickel as shown in the tables below are based on PM2.5 and PM10 filter sampling. All of the annual mean concentrations comply with the EU and WHO limit values.

Key statistics for Pb in 2024
mean1 P50 P98 max median n % filter_type
Rural Background

NL10627

2.3 1.8 7.4 8.1 1.8 175 47.8 PM10

NL10644

3.4 2.3 8.0 53.6 2.3 84 23.0 PM2.5
Rows where the text is greyed out indicates a data capture < 45%
1 Orange color indicates exceedance of the annual EU limit value
Table 22: Key concentration values for lead in 2024 (in ng/m3)
Key statistics for As in 2024
mean1 P50 P98 max median n % filter_type
Rural Background

NL10627

0.3 0.3 1 1.4 0.3 176 48.1 PM10

NL10644

0.4 0.3 1 1.3 0.3 84 23.0 PM2.5
Rows where the text is greyed out indicates a data capture < 45%
1 Orange color indicates exceedance of the annual EU limit value
Table 23: Key concentration values for arsenic in 2024 (in ng/m3)
Key statistics for Cd in 2024
mean1 P50 P98 max median n % filter_type
Rural Background

NL10627

0.1 0.0 0.2 0.3 0.0 175 47.8 PM10

NL10644

0.1 0.1 0.2 0.3 0.1 84 23.0 PM2.5
Rows where the text is greyed out indicates a data capture < 45%
1 Orange color indicates exceedance of the annual EU limit value
Table 24: Key concentration values for cadmium in 2024 (in ng/m3)
Key statistics for Ni in 2024
mean1 P50 P98 max median n % filter_type
Rural Background

NL10627

0.6 0.5 1.9 2.8 0.5 170 46.4 PM10

NL10644

0.5 0.4 1.4 1.6 0.4 78 21.3 PM2.5
Rows where the text is greyed out indicates a data capture < 45%
1 Orange color indicates exceedance of the annual EU limit value
Table 25: Key concentration values for nickel in 2024 (in ng/m3)

The annual means in the table below are based on solely PM10 filter sampling to conform with EU standards.

Annual heavy metals means per station type in 2024
component mean n
As 0.3 1
Cd 0.1 1
Ni 0.6 1
Pb 2.3 1
Table 26: Summary table for lead, arsenic, cadmium and nickel on PM10 filters in 2024 (in ng/m3)

2.9 Benzo(a)pyrene

Benzo(a)pyrene concentrations based on PM10 filter sampling for 2024 are given in the following table. The annual means were in compliance with the EU and WHO limit values.

Key statistics for benzo(a)pyrene in 2024
mean1 P50 P98 max median n %
Rural Background

NL10444

0.02 0.01 0.14 0.15 0.01 171 46.7
Urban Background

NL10418

0.04 0.03 0.14 0.14 0.03 173 47.3
Rows where the text is greyed out indicates a data capture < 30%
1 Orange color indicates exceedance of the annual EU limit value
Table 27: Key concentration values for benzo(a)pyrene in 2024 (in ng/m3)

3 Discussion

For all annual LML data from 1976 up to the present year, please consult the RIVM Data catalog. The monitoring data over several years including long-term trend charts can be assessed in the section on air quality on the Environmental Data Compendium website (Compendium voor de Leefomgeving). This website also provides information about the health impact of certain pollutants. The burden of disease due to air pollution can be significant, even if concentrations comply with the European limit values. Substantial improvements in public health can be achieved with further reduction of concentrations below the limit values.

4 References

Appendix A - Overview of accreditation information and limit values

The following table lists the accreditation certificate numbers for the LML for the measurements reported here and the limit values in µg/m³ for each pollutant from the three relevant guidelines. Measurements are carried out under EN ISO/IEC 17025:2017 accreditation by RIVM (L224) in collaboration with its regional partners DCMR (L520) and GGD Amsterdam (L426) who are accredited according to the same ISO standard. Analysis of heavy metals is outsourced to an external analytical laboratory that is accredited according to EN ISO/IEC 17025:2017 under L086.

component accreditation_numbera averaging_period EU_limit_value EU_limit_value_revised WHO_AQG
NO2 L520, L224, L426 year 40 20 10
PM10 L520, L224, L426 year 40 20 15
PM10 L520, L224, L426 day 50 max 35×b 45 max 18×b 45 max 3-4×b
PM2.5 L520, L224, L426 year 25 10 5
PM2.5 L520, L224, L426 day
25 max 18×b
O3 L520, L224, L426 max_8_h 120 max 25×b 120 max 18×b,c 100 max 3-4×b
O3 L520, L224, L426 peak_season

60
SO2 L520, L224, L426 day 125 max 3× 50 max 18× 40
SO2 L520, L224, L426 year
20b
CO L426 max_8_h 10000 10000 10000
CO L426 day
4000 max 18×b 4000 max 3-4×b
benzene L520, L426 year 5 3.4 1.7
Pb sampling L224/analysis L086 year 0.5 0.5 0.5
As sampling L224/analysis L086 year 0.006 0.006 0.066
Cd sampling L224/analysis L086 year 0.005 0.005 0.005
Ni sampling L224/analysis L086 year 0.02 0.02 0.025
benzo(a)pyrene sampling L224/analysis N/A year 0.001 0.001 0.12
a L224 is RIVM, L520 is DCMR, L426 is GGD Amsterdam, L086 is Eurofins Omegan B.V. analytical laboratory
b max n× means a maximum number of n exceedance days per calendar year
- For WHO this is also denoted as the 99th percentile, which is equivalent to 3-4 exceedance days per year
c Averaged over 3 years
Table 28: Accreditation information and limit values in μg/m3 from EU Directives 2008/50/EC and 2004/107/EC (EU_limit_value),
EU Directive 2024/2881 (EU_limit_value_revised), and WHO global air quality guidelines from 2021 (WHO_AQG)