Chad vs Romania: Ozone (O₃) concentration

Chad

60 ppb

in 2015

Romania

59 ppb

in 2015

Chad rank

66th

Romania rank

69th

Ozone (O₃) concentration over time

Chad
Romania

How they compare

Chad currently reports 60 ppb against 59 ppb in Romania, a difference of 1 ppb.

The two have swapped places 1 time across 7 shared years of data; in 1990 it was Romania ahead.

Chad ranks 66th and Romania ranks 69th of 187 countries.

Individual pages

Ozone (O₃) concentration in Chad
Ozone (O₃) concentration in Romania
Full country ranking

About this data

Indicator: Ozone (O₃) concentration
Unit: ppb
Source: Health Effects Institute (2017) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 187 places, 1,309 data points, 1990–2015
Last refreshed: 07 August 2026

Population-weighted average ozone (O₃) concentrations in parts per billion (ppb). Local concentrations of ozone are recorded and estimated at a 11x11km resolution. These values are subsequently weighted by population-density for calculation of nation-level average concentrations.