Refer to the Earth Force GREEN Water Quality Monitoring Manual for protocols to test turbidity, pH, nitrogen, phosphorous and dissolved oxygen levels in a creek or stream, as shown below.
Return to Gather to collect more data, or continue to Reason to make sense of your data.
NEXT STEP
Record your data in the Portfolio, and convert it to a labelled graph.
Return to Gather to collect more data, or continue to Reason to explain your findings.