Raum Seltz/Iffezheim

Last study site in the dammed Rhine before the German-French border

The sub-area is located at the end of the Rhine canal in the head- and the tailwater of the barrage at Iffezheim. The Rhine canal begins at Weil am Rhein and is characterized by 10 barrages and a complete straightening, which dates back to the so-called Tulla’sche Rhine correction (1830–1870). In this section, the Rhine is straightened and the riverbanks are reinforced by coarse rocks.

The adjacent areas are mainly used for agriculture. The tailwater sampling site is bordered by a marina on the French side of the Rhine. No above-ground discharges are found in this river section.

Sampling site

Iffezheim Last sampling site in the dammed Rhine before the German-French border


Zebra mussel Common mussel species as invasive animal in rivers and lakes with high information level for water pollution
Bream Bioindicator in rivers and lakes
Suspended particulate matter Fine insoluble mineral or organic particles in the water phase


Metals Eighty percent of all elements on earth are metals
Nonmetals Only eighteen elements in the periodic table
Organometallic compounds Organic substances with at least one metall atom
Chlorohydrocarbons Group of organic compounds with at least one covalently bonded chlorine atom
DDT and metabolites Toxic and persistent organochloropesticide
Hexachlorocyclohexane Several isomeric compounds among the group of chlorinated hydrocarbons
Polycyclic Aromatic Hydrocarbons Group of organic compounds with at least three condensed six-membered rings
Biocides and plant protection products Chemical agents against harmful organisms and for plant protection
Perfluoroalkyl and polyfluoroalkyl substances Persistent organic compounds in which the hydrogen atoms at the carbon skeleton are completely (perfluoroalkyl) or partially (polyfluoroalkyl) substituted by fluorine atoms.
Polycyclic musks Class of synthetic fragrances
Alkylphenol compounds Class of non-ionic surfactants and their degradation products
Stable Isotopes Atoms of one element with different weights
Supplementary parameters Additional information for the interpretation of contamination data

Sampling period

1995 - 2018