Indicator Assessment
Oxygen consuming substances in European rivers
Indicator Assessment
Prod-ID:
IND-20-en
Also known as:
CSI 019
,
WAT 002
Published 03 Dec 2019
Last modified 09 Dec 2020
22
min read
This is an old version, kept for reference only.
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Topics:
Water and marine environment
This page was archived on 09 Dec 2020 with reason:
Other
(New version data-and-maps/indicators/oxygen-consuming-substances-in-rivers/oxygen-consuming-substances-in-rivers-10 was published)
- In Europe’s rivers, oxygen consuming substances decreased over the period 1992 to 2017.
- On average, biochemical oxygen demand (BOD) fell to 51 % of the 1992 level during this period.
- Ammonium concentrations decreased even more substantially between 1992 and 2017, falling to 22 % of the 1992 level. However, the decrease has been less pronounced since 2010 and an increase has been observed in two most recent years.
- The decrease in BOD and ammonium concentrations is mainly because of a general improvement in waste water treatment throughout Europe.