Biology Group

This laboratory group monitors the impact of wastewater effluent on receiving waters by means of the following activities:

  • Performing acute and chronic bioassays on treatment plant effluents and receiving waters using standard toxicity test procedures developed by the EPA.

  • Making toxicity reduction/identification evaluations as necessary.

  • Logging monthly observations at receiving water stations to regularly assess environmental conditions and activities.

  • Conducting bioassessment surveys in the San Gabriel, Rio Hondo, and Santa Clara River watersheds. This involves the collection of benthic macroinvertebrates (BMIs), physical habitat observations, and flow measurements.

  • Performing bioassays for research including experimental treatment plant processes, interpretation techniques for toxicity data, and developing methods for identifying toxic constituents in water samples.