Biochemical Oxygen Demand (BOD5) and total ammonium concentrations in rivers between 1992 and 2007
How to read the graph: between 1992 and 2007, BOD5
decreased from 4 mg O2/l to 2 mg O2/l and ammonium
from 700 μg N/l to 300 μg N/l
For references, please go to www.eea.europa.eu/soer or scan the QR code.
PDF generated on 21 Oct 2014, 07:58 PM