Portugal vs Spain: Biochemical oxygen demand in rivers

Portugal
3.14 Milligrams per litre
in 2023
Spain
3.34 Milligrams per litre
in 2023
Portugal rank
3rd
Spain rank
2nd

Biochemical oxygen demand in rivers over time

  • Portugal
  • Spain
01234200720152023

How they compare

Spain currently reports 3.34 Milligrams per litre against 3.14 Milligrams per litre in Portugal, a difference of 0.2 Milligrams per litre.

That makes Spain's figure about 1.1 times Portugal's.

The two have swapped places 1 time across 17 shared years of data; in 2007 it was Portugal ahead.

Portugal ranks 3rd and Spain ranks 2nd of 28 countries.

Across the 3 decades both report, Portugal averaged higher in 1 and Spain in 2.

Head to head by decade

Decade Portugal Spain Difference Ahead
2000s 3.1 Milligrams per litre 2.32 Milligrams per litre 0.7767 Milligrams per litre Portugal
2010s 2.97 Milligrams per litre 3.22 Milligrams per litre 0.251 Milligrams per litre Spain
2020s 3.11 Milligrams per litre 3.34 Milligrams per litre 0.2325 Milligrams per litre Spain

Averages of every year both report within each decade.

Frequently asked questions

Which has higher biochemical oxygen demand in rivers, Portugal or Spain?
Spain, at 3.34 Milligrams per litre against 3.14 Milligrams per litre in Portugal as of 2023.
What is the difference in biochemical oxygen demand in rivers between Portugal and Spain?
0.2 Milligrams per litre, with Spain ahead.
How many years of comparable data are there for Portugal and Spain?
17 years are reported by both, from 2007 to 2023.
How do Portugal and Spain rank globally for biochemical oxygen demand in rivers?
Portugal ranks 3rd and Spain ranks 2nd of 28 countries.
Where does this data come from?
Eurostat, published as Biochemical oxygen demand in rivers. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Portugal vs Spain: Biochemical oxygen demand in rivers. Statizoid, drawing on Eurostat. Retrieved 24 September 2026, from https://reference.statizoid.com/compare/biochemical-oxygen-demand-in-rivers/portugal/spain/

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About this data

Indicator
Biochemical oxygen demand in rivers
Unit
Milligrams per litre
Source
Eurostat
Licence
CC BY 4.0 (Eurostat)
Coverage
29 places, 493 data points, 2007–2023
Last refreshed