Coastal Bioanalysts, Inc.

Whole Effluent Toxicity (WET), Aqueous Phase Toxicity

Freshwater Species

Ceriodaphnia dubia (water flea)
Pimephales promelas (fathead minnow)
Daphnia magna (water flea)
Daphnia pulex (water flea)
Oncorhynchus mykiss (rainbow trout)
Hyalella azteca (amphipod)
Selenastrum capricornutum (green algae)

Marine/Estuarine Species

Mysidposis (Americamysis) bahia (bay mysid)
Cyprinodon variegatus (sheepshead minnow)
Menidia beryllina (inland silverside)
Palaemonetes pugio (grass shrimp)

Crassostrea virginica (eastern oyster)
Mercenaria mercenaria (hard clam)
Mytilus edulis (blue mussel)
Acartia tonsa (copepod)
Vibrio fisheri (Microtox)



Coastal Bioanalysts has been conducting aquatic toxicity tests for over 27 years.  Annually we conduct over a thousand WET tests and numerous tests of pure compounds and formulations such as dispersants, surfactants, polymers and biocides.  We have the experience and facilities for the testing of cold-water, warm-water, marine, estuarine and freshwater species.  Additionally, commonly-used species are reared in our culture facility to insure the use of test organisms that are healthy, disease-free, and of appropriate age or life stage.

The precision values for our toxicity test methods well exceed national values.  Additionally, in blind studies in which our results are evaluated against those of other labs, the response of our animals is consistently robust (see Lab Perfomance page). What this means for our clients is fewer false positive results and more reliable estimates of the true toxicity of materials.

EPA, ASTM or USACE testing protocols are typically followed, although study-specific designs or modifications mandated by local regulations or site-specific requirements may also be employed.  Our staff scientists can assist in developing a study plan for your facility.








Chronic WET tests measure survival and a sub-lethal endpoint such as growth or reproduction whereas acute WET tests measure only survival