Figure

Biochemical oxygen demand and ammonium in European Rivers

Figure Created 28 Nov 2022 Published 30 Nov 2022 Last modified 30 Nov 2022

2 min read

Topics: Water and marine environment Biodiversity — Ecosystems

This figure shows the trends in biochemical oxygen demand (BOD) and ammonium in European rivers.

https://www.eea.europa.eu/data-and-maps/figures/biochemical-oxygen-demand-and-ammonium-1/fig1-154419-wat002-v2.eps/image_large

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Methodology:

The data series are calculated as the average of annual mean concentrations for river sites in Europe. Only complete time series after inter/extrapolation are included (see indicator's "Methodology" section).

Left chart:
BOD₇ data has been recalculated into BOD₅ data. Two time series are shown – a longer time series representing fewer water bodies and a shorter time series representing more water bodies.

Right chart:
Two time series are shown – a longer time series representing fewer water bodies and a shorter time series representing more water bodies.

Units:

Left chart: mg O₂/l
Right chart: µg NH₄-N/l

Rights:

EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (https://www.eea.europa.eu/legal/copyright). Copyright holder: European Environment Agency (EEA).

Owners:

European Environment Agency (EEA)

Processors:

TC Vode

Figure type:

Graph

Additional information

The geographical coverage is the 38 EEA member countries, but only complete time series are included in the analysis.
Left chart:
BOD in rivers: The number of river monitoring sites included per country is given in parenthesis:
1992-2020: Albania (4), Austria (44), Belgium (26), Bulgaria (57), Czechia (22), Estonia (33), Finland (5), Ireland (3), Latvia (13), Lithuania (22), North Macedonia (4), Slovakia (8), Slovenia (8), Spain (78), Sweden (1).
2000-2020: Albania (5), Austria (46), Belgium (36), Bulgaria (74), Croatia (23), Cyprus (4), Czechia (22), Estonia (35), Finland (5), Ireland (14), Italy (44), Latvia (16), Lithuania (22), North Macedonia (8), Poland (90), Romania (88), Serbia (34), Slovakia (8), Slovenia (10), Spain (179), Sweden (1).

Right chart:
Ammonium in rivers: The number of river monitoring sites included per country is given in parenthesis:
1992-2020: Albania (4), Austria (30), Belgium (20), Bulgaria (38), Estonia (35), Finland (60), France (160), Germany (119), Ireland (4), Latvia (12), Lithuania (21), North Macedonia (5), Norway (29), Slovenia (9), Spain (22), Sweden (111).
2000-2020: Albania (8), Austria (46), Belgium (23), Bulgaria (57), Croatia (23), Estonia (37), Finland (69), France (237), Germany (122), Iceland (1), Ireland (10), Italy (25), Latvia (15), Lithuania (22), North Macedonia (18), Norway (29), Poland (4), Romania (89), Serbia (34), Slovenia (10), Spain (55), Sweden (113).

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24 Mar 2022 - Biochemical oxygen demand and ammonium in European rivers

Geographic coverage

Albania Austria Belgium Bosnia and Herzegovina Bulgaria Croatia Cyprus Czechia Denmark Estonia Finland France Germany Greece Hungary Iceland Ireland Italy Kosovo (UNSCR 1244/99) Latvia Liechtenstein Lithuania Luxembourg Malta Montenegro Netherlands North Macedonia Norway Poland Portugal Romania Serbia Slovakia Slovenia Spain Sweden Switzerland Turkey