Volunteer to help take water samples at 20 or more points along the Wissahickon Creek for determine salt levels in winter.Are you interested in participating in a citizen science study? WEC staff and Friends of the Wissahickon volunteers will be taking water samples at 20 points along the Wissahickon Creek and its tributaries, then performing two tests that indicate the levels of salt in the Creek. Water collection is 9am-noon. Most volunteers are needed for water collection. Testing is 12:30 to 3 pm. Where proper footwear for wet, muddy, or frozen conditions. NOTE NEW LOCATION: Friends of the Wissahickon Maintenance