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Average ammonium concentration in freshwater by country

Average annual concentration of ammonium in lakes.

Countries reporting
32
Highest
1.17 milligrams per liter
Greece
Lowest
0.0031 milligrams per liter
Iceland
Median
0.0789 milligrams per liter
Years covered
30
1992–2021
Data points
693

What the numbers show

Average ammonium concentration in freshwater is currently reported for 32 countries. The highest value is 1.17 milligrams per liter in Greece; the lowest is 0.0031 milligrams per liter in Iceland.

The median across all reporting countries is 0.0789 milligrams per liter, and the mean is 0.1424 milligrams per liter.

The gap between the highest and lowest reporting country is a factor of about 378.

Over the past decade 12 countries rose and 19 fell. The largest increase was in Greece (up 957.2%), and the largest decrease in Switzerland (down 93.0%).

Average ammonium concentration in freshwater: full country ranking

#Country LatestYear 10-year changeTrend
1 Greece 1.17 milligrams per liter 2015 up 957.2% volatile
2 Malta 0.6324 milligrams per liter 2013 up 68.7% rising
3 Netherlands 0.352 milligrams per liter 2021 down 29.9% falling
4 Spain 0.2883 milligrams per liter 2021 up 58.1% volatile
5 Portugal 0.2243 milligrams per liter 2010 down 11.1% falling
6 Bulgaria 0.2103 milligrams per liter 2021 up 135.9% volatile
7 France 0.178 milligrams per liter 2021 up 203.4% volatile
8 Italy 0.1249 milligrams per liter 2021 down 5.5% volatile
9 Serbia 0.1215 milligrams per liter 2021 up 28.3% falling
10 Albania 0.1187 milligrams per liter 2021 up 169.3% volatile
11 Germany 0.1048 milligrams per liter 2021 down 63.8% volatile
12 Belgium 0.1009 milligrams per liter 2021 down 40.6% falling
13 Denmark 0.0961 milligrams per liter 2021 up 11.5% falling
14 Hungary 0.0949 milligrams per liter 2007 up 82.2% volatile
15 Poland 0.0885 milligrams per liter 2021 down 13.5% falling
16 Montenegro 0.0876 milligrams per liter 2013 — volatile
17 Czechia 0.0703 milligrams per liter 2019 down 18.7% falling
18 Romania 0.0643 milligrams per liter 2021 down 79.1% volatile
19 Austria 0.064 milligrams per liter 2021 up 232.1% rising
20 Latvia 0.0634 milligrams per liter 2021 down 6.8% falling
21 Slovenia 0.0435 milligrams per liter 2016 down 85.3% flat
22 Cyprus 0.0422 milligrams per liter 2021 up 113.7% volatile
23 Lithuania 0.0378 milligrams per liter 2021 down 19.8% falling
24 Estonia 0.036 milligrams per liter 2021 down 5.5% volatile
25 Sweden 0.0288 milligrams per liter 2021 down 17.8% rising
26 Ireland 0.0249 milligrams per liter 2021 up 9.5% rising
27 Bosnia and Herzegovina 0.0214 milligrams per liter 2013 down 68.3% volatile
28 Finland 0.0211 milligrams per liter 2021 down 43.6% volatile
29 Croatia 0.0194 milligrams per liter 2021 down 71.6% falling
30 Norway 0.0112 milligrams per liter 2021 down 41.5% falling
31 Switzerland 0.0094 milligrams per liter 2014 down 93.0% volatile
32 Iceland 0.0031 milligrams per liter 2021 down 70.4% volatile

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Average ammonium concentration in freshwater by country. Statizoid, drawing on European Environment Agency (2023) – with minor processing by Our World in Data. Retrieved 24 September 2026, from https://environment.statizoid.com/stat/average-ammonium-concentration-in-freshwater/

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About this data

Indicator
Average ammonium concentration in freshwater
Unit
milligrams per liter
Source
European Environment Agency (2023) – with minor processing by Our World in Data
Licence
CC BY 4.0 (Our World in Data)
Coverage
32 places, 693 data points, 1992–2021
Last refreshed

Average annual concentration of ammonium in lakes.