Belgium vs Spain: Average nitrate concentration in freshwater

Belgium

27.71 milligrams per litre

in 2006

Spain

36.93 milligrams per litre

in 2021

Belgium rank

5th

Spain rank

2nd

Average nitrate concentration in freshwater over time

Spain currently reports 36.93 milligrams per litre against 27.71 milligrams per litre in Belgium, a difference of 9.21 milligrams per litre.

That makes Spain's figure about 1.3 times Belgium's.

The two have swapped places 1 time across 13 shared years of data; in 1993 it was Belgium ahead.

Belgium ranks 5th and Spain ranks 2nd of 34 countries.

Indicator: Average nitrate concentration in freshwater
Unit: milligrams per litre
Source: European Environment Agency (2023) – with minor processing by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 34 places, 655 data points, 1992–2021
Last refreshed: 07 August 2026

Average annual concentration of nitrate in groundwater.