Average ammonium concentration in freshwater by country
Average annual concentration of ammonium in lakes.
Countries reporting
30
Highest
1.17 milligrams per litre
Greece
Lowest
0.0031 milligrams per litre
Iceland
Median
0.0789 milligrams per litre
Years covered
30
1992–2021
Data points
693
What the numbers show
Average ammonium concentration in freshwater is currently reported for 30 countries. The highest value is 1.17 milligrams per litre in Greece; the lowest is 0.0031 milligrams per litre in Iceland.
The median across all reporting countries is 0.0789 milligrams per litre, and the mean is 0.13 milligrams per litre.
The gap between the highest and lowest reporting country is a factor of about 378.
Over the past decade 10 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 | Latest | Year | 10-year change | Trend |
|---|---|---|---|---|---|
| 1 | Greece | 1.17 milligrams per litre | 2015 | up 957.2% | volatile |
| 3 | Netherlands | 0.352 milligrams per litre | 2021 | down 29.9% | falling |
| 4 | Spain | 0.2883 milligrams per litre | 2021 | up 58.1% | volatile |
| 5 | Portugal | 0.2243 milligrams per litre | 2010 | down 11.1% | falling |
| 6 | Bulgaria | 0.2103 milligrams per litre | 2021 | up 135.9% | volatile |
| 7 | France | 0.178 milligrams per litre | 2021 | up 203.4% | volatile |
| 8 | Italy | 0.1249 milligrams per litre | 2021 | down 5.5% | volatile |
| 9 | Serbia | 0.1215 milligrams per litre | 2021 | up 28.3% | falling |
| 10 | Albania | 0.1187 milligrams per litre | 2021 | up 169.3% | volatile |
| 11 | Germany | 0.1048 milligrams per litre | 2021 | down 63.8% | volatile |
| 12 | Belgium | 0.1009 milligrams per litre | 2021 | down 40.6% | falling |
| 13 | Denmark | 0.0961 milligrams per litre | 2021 | up 11.5% | falling |
| 14 | Hungary | 0.0949 milligrams per litre | 2007 | up 82.2% | volatile |
| 15 | Poland | 0.0885 milligrams per litre | 2021 | down 13.5% | falling |
| 16 | Montenegro | 0.0876 milligrams per litre | 2013 | — | volatile |
| 17 | Czechia | 0.0703 milligrams per litre | 2019 | down 18.7% | falling |
| 18 | Romania | 0.0643 milligrams per litre | 2021 | down 79.1% | volatile |
| 19 | Austria | 0.064 milligrams per litre | 2021 | up 232.1% | rising |
| 20 | Latvia | 0.0634 milligrams per litre | 2021 | down 6.8% | falling |
| 21 | Slovenia | 0.0435 milligrams per litre | 2016 | down 85.3% | flat |
| 22 | Cyprus | 0.0422 milligrams per litre | 2021 | up 113.7% | volatile |
| 23 | Lithuania | 0.0378 milligrams per litre | 2021 | down 19.8% | falling |
| 24 | Estonia | 0.036 milligrams per litre | 2021 | down 5.5% | volatile |
| 25 | Sweden | 0.0288 milligrams per litre | 2021 | down 17.8% | rising |
| 27 | Bosnia and Herzegovina | 0.0214 milligrams per litre | 2013 | down 68.3% | volatile |
| 28 | Finland | 0.0211 milligrams per litre | 2021 | down 43.6% | volatile |
| 29 | Croatia | 0.0194 milligrams per litre | 2021 | down 71.6% | falling |
| 30 | Norway | 0.0112 milligrams per litre | 2021 | down 41.5% | falling |
| 31 | Switzerland | 0.0094 milligrams per litre | 2014 | down 93.0% | volatile |
| 32 | Iceland | 0.0031 milligrams per litre | 2021 | down 70.4% | volatile |
About this data
Average annual concentration of ammonium in lakes.