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Acute and Chronic Toxicity Tests

Effluent regulations typically require routine acute lethality toxicity tests, and periodic chronic toxicity tests. Acute toxicity tests assess the immediate effects of a sample, measuring lethality (death). Chronic toxicity tests measure a quantitative biological function, usually growth or reproductive success. 
 
In Canada, acute lethality toxicity tests commonly use rainbow trout (Onchorynchus mykiss) and Daphnia magna, with 96 and 48-hour test exposures, respectively. These tests are generally supplemented by chronic toxicity tests, most often using the fathead minnow (Pimephales promelas) 7-day growth and survival test, and the water flea (Ceriodaphnia dubia) 3-brood reproduction and survival test. Other species utlized for chronic toxicity testing include an algae (Pseudokirchneriella subcapitata) and a duckweed (Lemna minor) species, pending regulatory requirements.
 
Pollutech has extensive experience testing surface water, groundwater, effluent, receiving water, pilot plant effluent, salt water and fresh water. Examination of effects on organisms from various levels in the food chain can give a more complete picture for potential environmental impact. Pollutech conducts aquatic toxicity tests with single and multiple-celled plants, as well as invertebrate and vertebrate species.
 
Rainbow Trout                              Daphnia magna                             Duckweed
 
troutdaphnidduckweed
 
Contact Us to discuss how Pollutech can help you with your Toxicity Testing Requirements.
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