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Cities with the strongest published PM2.5 and NO2 combination

Charlottetown, Canada has the lowest combined PM2.5 and NO2 percentile score of the 30 cities compared: PM2.5 2.08 µg/m³ · NO2 2.71 µg/m³ (Official ECCC/NAPS 2024 annual daily-mean station observations, reproducibly aggregated as an arithmetic mean for eligible stations within 25 km of the target city coordinate. This is a derived place observation, not an asserted municipal monitor aggregate., 2024).

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Cities with both annual PM2.5 and annual NO2 are compared using a transparent average of their lower-is-better percentile ranks. The two original values and sources remain visible.

Items compared
30
Countries represented
9
Last checked
2026-08-03

Source-backed answers

Compare each answer with its unit and checked date; the complete source ledger is below.

Showing all 30 rows

Original rankCity or placePublished valueSource and scope
1Charlottetown, CanadaPM2.5 2.08 µg/m³ · NO2 2.71 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
2Bad Krozingen, GermanyPM2.5 3 µg/m³ · NO2 2 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
3Albufeira, PortugalPM2.5 3 µg/m³ · NO2 2.37 µg/m³2026-08-03
Source 1 Source 2 Scope: city · Period: 2024-12-31 + 2024
4Norrtälje, SwedenPM2.5 3.36 µg/m³ · NO2 1.88 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
5Halifax, CanadaPM2.5 1.9 µg/m³ · NO2 3.61 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
6Östhammar, SwedenPM2.5 3.47 µg/m³ · NO2 2.56 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2023
7Kingston, CanadaPM2.5 2.92 µg/m³ · NO2 3.72 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
8Bollnäs, SwedenPM2.5 3.54 µg/m³ · NO2 2.61 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2023
9Angra do Heroísmo, PortugalPM2.5 2.89 µg/m³ · NO2 3.84 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
10Lindesberg, SwedenPM2.5 3.9 µg/m³ · NO2 0.818 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2023 + 2024
11St. Thomas, CanadaPM2.5 3.35 µg/m³ · NO2 3.18 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
12Tierp, SwedenPM2.5 3.62 µg/m³ · NO2 2.8 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2023
13Viana do Castelo, PortugalPM2.5 3.82 µg/m³ · NO2 2.61 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
14Conception Bay South, CanadaPM2.5 2.64 µg/m³ · NO2 4.01 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
15Fundão, PortugalPM2.5 4 µg/m³ · NO2 2.84 µg/m³2026-08-03
Source 1 Source 2 Scope: city · Period: 2023-12-31 + 2024
16Bastogne, BelgiumPM2.5 3 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
17Kohtla-Järve, EstoniaPM2.5 3 µg/m³ · NO2 4 µg/m³2026-07-29
Source 1 Source 2 Scope: city · Period: 2025-12-31 + 2024-12-31
18Praia da Vitória, PortugalPM2.5 3 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
19Albstadt, GermanyPM2.5 4 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
20Askøy, NorwayPM2.5 4 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
21Benidorm, SpainPM2.5 3 µg/m³ · NO2 5 µg/m³2026-08-03
Source 1 Source 2 Scope: city · Period: 2024-12-31
22Lalín, SpainPM2.5 5 µg/m³ · NO2 2 µg/m³2026-07-29
Source 1 Source 2 Scope: city · Period: 2024-12-31
23Zarautz, SpainPM2.5 5 µg/m³ · NO2 3 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
24Netphen, GermanyPM2.5 5.07 µg/m³ · NO2 3.79 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2024
25Ashington, United KingdomPM2.5 4.95 µg/m³ · NO2 4.66 µg/m³2026-07-15
Source 1 Source 2 Scope: city · Period: 2025
26Bad Homburg v. d. Hoehe, GermanyPM2.5 5 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
27Dillenburg, GermanyPM2.5 5 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
28Requena, SpainPM2.5 5 µg/m³ · NO2 4 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31
29Narva, EstoniaPM2.5 4 µg/m³ · NO2 6 µg/m³2026-07-29
Source 1 Source 2 Scope: city · Period: 2025-12-31 + 2024-12-31
30Almansa, SpainPM2.5 6 µg/m³ · NO2 1 µg/m³2026-08-01
Source 1 Source 2 Scope: city · Period: 2024-12-31

What the numbers say

  • Charlottetown, Canada leads at 0.58.
  • Almansa, Spain sits at the other end with 7.31.
  • The middle of this ranking is 2.98, across 30 places that publish the metric.
  • The spread between first and last is 6.73.

Quick answer

What does Cities with the strongest published PM2.5 and NO2 combination show?

Charlottetown, Canada has the lowest combined PM2.5 and NO2 percentile score of the 30 cities compared: PM2.5 2.08 µg/m³ · NO2 2.71 µg/m³ (Official ECCC/NAPS 2024 annual daily-mean station observations, reproducibly aggregated as an arithmetic mean for eligible stations within 25 km of the target city coordinate. This is a derived place observation, not an asserted municipal monitor aggregate., 2024).

How this list is built

Keep cities with compatible annual PM2.5 and annual NO2 observations, rank each pollutant lower-is-better within the overlapping coverage, then average the two percentile ranks.

  • Lower composite rank means both published pollutant values are relatively low within the overlap set.
  • This does not infer missing pollutants or city-wide exposure from a regional observation.
Rows
30 places
Geographic grain
city
Observation period
2023 to 2025-12-31 + 2024-12-31
Last checked
2026-08-03
With an official source link
30 of 30

Cite this page

Open a format to select or copy this ImmigrationDB compilation citation. The native disclosure and text fallback work without JavaScript.

APA citation
ImmigrationDB. (2026, October 16). Cities with the strongest published PM2.5 and NO2 combination [ImmigrationDB compilation; version a6db8e72e9276ba8d90ec380f985d9a1]. ImmigrationDB. https://immigrationdb.com/reports/cities-with-cleanest-air/ Retrieved 2026-10-16. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/
BibTeX citation
@misc{immigrationdb_immigrationdb_cities-with-the-strongest-published-pm2-5-and-no2-combination_08bd545e93ba,
  author = {ImmigrationDB},
  title = {Cities with the strongest published PM2.5 and NO2 combination},
  publisher = {ImmigrationDB},
  year = {2026},
  date = {2026-10-16},
  version = {a6db8e72e9276ba8d90ec380f985d9a1},
  url = {https://immigrationdb.com/reports/cities-with-cleanest-air/},
  note = {Retrieved 2026-10-16. ImmigrationDB compilation. Compilation license: CC BY 4.0, https://creativecommons.org/licenses/by/4.0/},
}
Markdown citation
[Cities with the strongest published PM2.5 and NO2 combination](https://immigrationdb.com/reports/cities-with-cleanest-air/) — ImmigrationDB; ImmigrationDB; version a6db8e72e9276ba8d90ec380f985d9a1; retrieved 2026-10-16; built 2026-10-16.

This citation identifies the ImmigrationDB compilation/page. Underlying source publishers and datasets retain their own terms; inspect the Sources section and cite those records separately. View the underlying source records.

Sources

  1. Official ECCC/NAPS 2024 annual daily-mean station observations, reproducibly aggregated as an arithmetic mean for eligible stations within 25 km of the target city coordinate. This is a derived place observation, not an asserted municipal monitor aggregate.Environment and Climate Change Canada (ECCC), National Air Pollution Surveillance (NAPS) Program · Checked 2026-07-15
  2. Official ECCC/NAPS 2024 station DMean observation retained at source grain; no place value is asserted because the approved 25 km observation condition is not met.Environment and Climate Change Canada (ECCC), National Air Pollution Surveillance (NAPS) Program · Checked 2026-07-15
  3. EEA air quality statistics — DE PM2.5 annual mean 2024 (station Schwarzwald-Süd)European Environment Agency (EEA) · Checked 2026-08-01
  4. EEA air quality statistics — DE NO2 annual mean 2024 (station Schwarzwald-Süd)European Environment Agency (EEA) · Checked 2026-08-01
  5. European Environment AgencyEuropean Environment Agency · Checked 2026-08-03
  6. official validated air-quality station bulk; no exact target station-period input foundEuropean Environment Agency · Checked 2026-07-15
  7. Official exact-kommun station observations are derived to a kommun aggregate.Naturvårdsverket via SMHI · Checked 2026-07-15
  8. Official SMHI 2023 national model values are derived from exact-kommun receptor/grid features.SMHI · Checked 2026-07-15
  9. Official SMHI 2023 national model values are derived from exact-kommun receptor/grid features.SMHI · Checked 2026-07-15
  10. Official SMHI 2023 national model values are derived from exact-kommun receptor/grid features.SMHI · Checked 2026-07-15
Show 2 more sources
  1. Official SMHI 2023 national model values are derived from exact-kommun receptor/grid features.SMHI · Checked 2026-07-15
  2. EEA air quality statistics — BE PM2.5 annual mean 2024 (station 43N113 - SAINT-ODE)European Environment Agency (EEA) · Checked 2026-08-01