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The establishment of EVISA is funded by the EU through the Fifth Framework Programme (G7RT- CT- 2002- 05112).

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lowest-observed-effect concentration (LOEC)

Lowest concentration of a material used in an aquatic toxicity test that has a statistically significant ad-
verse effect on the exposed population of test organisms compared with controls.
Note:       When derived from a life cycle or partial life cycle test, it is numerically the same as the
upper  limit  of  the  maximum  acceptable  toxicant  concentration (MATC).  Also  called
lowest-observed-adverse-effect level (LOAEL).


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