The Northwest Environmental Training Center presents:

Introduction to Aquatic Toxicology
Understanding Impacts of Organic Chemicals and Metals on Aquatic Ecosystems

Course ID: ETOX - 410 (2 days)
June 19 - 20, 2008, 8:30 A.M. to 5 P.M.
Emerald Bay at the Bellingham Yacht Club
2625 S Harbor Loop Drive
Bellingham, Washington


Instructor: Ruth M. Harper, Ph.D.


Register Online | Directions | Accommodations | Course Brochure PDF | Course Catalog

Description: This introductory course provides participants with an understanding of the foundations of aquatic toxicology and how these concepts are applied to managing pollutants in aquatic environments. The course covers terminology, common test designs, and endpoints such as lethality, cancer, and endocrine disruption. Important legacy and emerging pollutants of concern such as heavy metals, organic pesticides, PAHs, PCBs, PBDEs, pharmaceuticals, and personal care products will also be presented. Fate and transport will be discussed as it relates to bioavailability and pollutant partitioning in aquatic environments  Water Quality criteria from the Clean Water Act will be discussed with an emphasis on, and examples of, site specific criteria for metals using hardness correction, water effects ratio (WER), and the biotic ligand model (BLM), which has been included in the 2007 EPA updates for Aquatic Life Copper Criteria.

Course Topics:

Sources of toxic chemicals entering the aquatic environment.

Exposure pathways for aquatic organisms.

Biological, physical, and chemical factors affecting bioavailability and toxicity.

Bioaccumulation, bioconcentration, and biomagnification.

Modes of toxic chemical action, including enzyme inhibition and endocrine disprution.

Laboratory assessment of toxicity – LC50, EC50, NOEC, LOEC, MATC, and dose-response curves.

Development and use of water quality standards.

About the instructor: Ruth Harper is an Assistant Professor of Environmental Toxicology and Chemistry in the Huxley College of the Environment at Western Washington University. She has worked on projects ranging from genetically based tolerance to pollutant exposure in marine systems with the NOAA Ecotoxicology Branch, CCHEBR, development of groundwater WET tests with photoactive pollutants with the Washington State DOE, and metal contamination and effects in mining systems in Colorado, Idaho, Washington, and British Columbia with agencies that include the USGS and USEPA.

After completing this course, participants will be able to:

  • Understand the approaches (and limitations of those approaches) used to understand toxicological problems.
  • Apply toxicological principles to environmental issues.
  • Understand how aquatic organisms are exposed to toxic chemicals and methods used to assess accumulation levels.
  • Identify factors affecting toxicity, and understand the similarities and differences between the toxicity of metals and organic chemicals.
  • Know the type of information needed to determine and predict bioavailability and effects of toxicant exposures.
  • Understand modes of action of toxic chemicals.
  • Use and understand toxicological terminology.
  • Assess toxicity in terms of LC50 and EC50, and develop dose-response curves.
  • Understand the scientific basis for and limitations of water quality standards.
  • Ask the right questions.

Prerequisites Some college-level biology and chemistry coursework is required (even if it was a long time ago). A fundamental understanding of aquatic ecology is also helpful.

Education level:  Introductory/Refresher

Course Materials: Attendees will receive a binder containing workshop proceedings and reference material.

Continuing Education Units: 1.3

What to Bring: Pen or pencil, coffee mug, and a water bottle (to reduce waste). Please wear comfortable clothes appropriate for the prevailing weather. Lunch will be on your own. There are numerous restaurants within walking distance. Drinks and snacks will be provided each day.

Registration: $495 (*$395 reduced tuition is available for Native American tribes; government employees; nonprofits; students; and NAEP, NEBC, NWAEP or AFS members). You may register via the link below or by calling the Northwest Environmental Training Center at 206-762-1976.

Cancellation Policy: Registration fees are fully refundable up to 30 days prior to the event and 50 percent refundable (or 100% credit) thereafter up to 3 business days prior to the event. No refunds are issued for cancellations occurring less than 3 business days before the start day. Course registration fees and cancellation policy are subject to change without notice.

Disability Accommodations: To request disability accommodations, please contact us at info@nwetc.org or (206) 762-1976 at least 30 days prior to the event.



To find out more about NWETC's programs send us an email

Northwest Environmental Training Center
A nonprofit 501(c)(3) program of the Northwest Environmental Education Council
650 S. Orcas Street, Suite 220, Seattle, Washington 98108
Phone: (206)762-1976, Fax: (206)762-1979
www.nwetc.org