As part of their science studies, the 7th grade students of Jr. CAM conduct water quality tests on the East Fork of the Lewis River at Lewisville Park. The site is a short distance north of our school in Battle Ground, WA. The students, assisted by trained community volunteers recruited by the Water Resources Education Center, conduct a number of physical, chemical, and biological tests. Biological assessments are made based upon the Pollution Tolerance Index (PTI), OWEB Level II (family-level) assessment of water quality, and FFG (Functional Feeding Groups) & River Continuum analysis.

A summary of the water quality tests and the results of this year's macroinvertebrate counts are listed below:

---

Physical/Chemical/Biological Tests Summary

• summary table of physical, chemical and biological tests for 2004-05 (.pdf)
• summary table of physical, chemical and biological tests for 2005-06 (.pdf)
• summary table of physical, chemical and biological tests for 2006-07 (.pdf)

• summary table of physical, chemical and biological tests for 2005-07 (.pdf)
• summary table of physical, chemical and biological tests for 2007-08 (.pdf)
• summary table of physical, chemical and biological tests for 2005-2010 (.pdf) << New May 2010

---

• WA NatureMapping Water Monitoring Site Index (select the "East Fork Lewis River" link)

---

Macros Test Results

Cumulative Macroinvertebrate Data

• macroinvertebrate totals (Nov. 2005 - Nov. 2007) (.pdf)
• macroinvertebrate totals (Nov. 2005 - Apr. 2010) (.pdf) << updated May 2010

Fall 2004

• macroinvertebrates collected

September 30, 2005

• macroinvertebrate pollution tolerance graphs (.pdf)

November 18, 2005

• macroinvertebrates count (.pdf)
• macroinvertebrate pollution tolerance graphs (.pdf)
• functional feed groups graphs (.pdf)

March 21, 2006

• macroinvertebrate count (.pdf)
• macroinvertebrate pollution tolerance graphs (.pdf)
• PTI worksheet (.pdf)
• functional feed groups graphs (.pdf)
• OWEB worksheet (.pdf)

Pictures of macroinvertebrates collected at Lewisville Park - Spring 2006: East Fork macro images

September 2006 - March 2007

• macroinvertebrates count& FFG graphs (.pdf)

September 2007 - April 2008

• September 25, 2007 - macroinvertebrates count & FFG graphs (.pdf)
• November 21, 2007 - macroinvertebrates count & FFG graphs (.pdf)
• April 29, 2008 - macroinvertebrates count & FFG graphs (.pdf)

October 2009

• macroinvertebrates count (.pdf)