Japan vs Portugal: Wastewater - connection rates to treatment — Public total treatment
Wastewater - connection rates to treatment — Public total treatment over time
- Japan
- Portugal
How they compare
Japan currently reports 81.1 Percentage of population against 70.7 Percentage of population in Portugal, a difference of 10.4 Percentage of population.
That makes Japan's figure about 1.1 times Portugal's.
The two have swapped places 2 times across 12 shared years of data; in 1975 it was Japan ahead.
Japan ranks 21st and Portugal ranks 23rd of 36 countries.
Japan has averaged higher in every one of the 4 decades both report.
Head to head by decade
| Decade | Japan | Portugal | Difference | Ahead |
|---|---|---|---|---|
| 1970s | 23 Percentage of population | 1.1 Percentage of population | 21.9 Percentage of population | Japan |
| 1980s | 33 Percentage of population | 2.9 Percentage of population | 30.1 Percentage of population | Japan |
| 1990s | 44 Percentage of population | 20.9 Percentage of population | 23.1 Percentage of population | Japan |
| 2000s | 69.8 Percentage of population | 65.74 Percentage of population | 4.07 Percentage of population | Japan |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher wastewater - connection rates to treatment — public total treatment, Japan or Portugal?
- Japan, at 81.1 Percentage of population against 70.7 Percentage of population in Portugal as of 2024.
- What is the difference in wastewater - connection rates to treatment — public total treatment between Japan and Portugal?
- 10.4 Percentage of population, with Japan ahead.
- How many years of comparable data are there for Japan and Portugal?
- 12 years are reported by both, from 1975 to 2009.
- How do Japan and Portugal rank globally for wastewater - connection rates to treatment — public total treatment?
- Japan ranks 21st and Portugal ranks 23rd of 36 countries.
- Where does this data come from?
- Organisation for Economic Co-operation and Development, published as Wastewater - connection rates to treatment — Public total treatment. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
This dataset provides information on the level of public equipment installed by countries to managed and abate water pollution. It shows the percentage of national population connected to "public" sewerage networks and related treatment facilities, and the percentage of national population connected to "public" wastewater treatment plants, and the degree of treatment. Connected here means actually connected to a wastewater plants through a public sewage network. When analysing these data, it should be kept in mind that the optimal connection rate is not necessarily 100%. It may vary among countries and depends on geographical features and on the spatial distribution of habitats. The interpretation of those data should take into account some variations in countries' definitions, as reflected in metadata. Data source(s): Joint OECD/Eurostat questionnaire on Inland Waters. Data for non-OECD countries is sourced from UNSD (https://unstats.un.org/unsd/envstats/country_files) Contact: ENV.Stat@oecd.org Dataset release date: August 7, 2026 Country metadata - Métadonnées pays