Tonga · Urban PM2.5 Concentration (WHO)
6.22023
Unit: micrograms per cubic metre. Publisher measure: Concentrations of fine particulate matter (PM2.5).
Annual population-weighted PM2.5 concentration in urban areas, matching WHO SDG11.6.2 metadata; label urban scope explicitly.
Measurement basis: model-based estimate.
Displayed values are rounded, with extra precision when needed to keep a positive estimate positive. Downloads retain the full numeric estimate and the publisher's original display text separately.
A “<” sign means strictly below the stated number. Numeric readings and uncertainty endpoints keep their own comparison signs. A number without a sign does not establish certainty or an observed outcome.
World Health Organization (Global Health Observatory); retrieved 2026-09-07. Retrieval time is separate from an official publisher release vintage.
Download this immutable source capture · Source and coverage corrections
One row per country, indicator and year, with raw values, source links and reuse notices. Thresholds have an empty numeric value and separate number/operator fields; value_kind distinguishes upper bounds from absent readings.
History and uncertainty
Charts plot numeric readings. Reported upper bounds create gaps; their values, uncertainty endpoints and source notes remain available in the table and downloads.
Reported estimates and uncertainty · 14 rows
Each comparison sign applies to its own reading or uncertainty endpoint. Values retain source precision. “Not reported” identifies an absent reading or uncertainty endpoint in this source capture.
| Country | Year | Reading | Lower endpoint | Upper endpoint | Publisher note |
|---|---|---|---|---|---|
| Tonga | 2010 | 7.334465053 | 3.107766977 | 16.635651401 | — |
| Tonga | 2011 | 7.021344606 | 3.277845693 | 15.773127817 | — |
| Tonga | 2012 | 7.169377012 | 3.136372796 | 15.328047901 | — |
| Tonga | 2013 | 6.967513258 | 3.140799023 | 15.318358466 | — |
| Tonga | 2014 | 6.959110994 | 3.357775221 | 15.544314071 | — |
| Tonga | 2015 | 7.106235662 | 3.300366938 | 15.475809042 | — |
| Tonga | 2016 | 6.904308198 | 3.403427862 | 15.222013992 | — |
| Tonga | 2017 | 6.960765745 | 3.238869002 | 15.06738911 | — |
| Tonga | 2018 | 6.978638578 | 3.298479133 | 15.485405964 | — |
| Tonga | 2019 | 7.162704762 | 3.358279126 | 17.074307769 | — |
| Tonga | 2020 | 6.824753742 | 3.502728527 | 17.657869822 | — |
| Tonga | 2021 | 6.581945886 | 3.4230727 | 16.598695013 | — |
| Tonga | 2022 | 6.740445948 | 3.227368669 | 16.67107743 | — |
| Tonga | 2023 | 6.235277962 | 3.083695635 | 16.994593065 | — |
One row per country, indicator and year, with raw values, source links and reuse notices. Thresholds have an empty numeric value and separate number/operator fields; value_kind distinguishes upper bounds from absent readings.