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Watershed Watch Community Science

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After performing identification according to New Mexico Watershed Watch Order key and counting the numbers of individuals in each major group, perform multiple sweeps over the trays to ensure a representative sample has been collected. Have you students determine whether major invertebrates are from Group One Taxa- Pollution sensitive, Group Two Taxa-Somewhat Pollution tolerant, or Group Three Taxa- Pollution tolerant. Compare the numbers of individuals and percentages within each group to determine what is the most dominant group represented at the site. This will give you a rough idea as to the quality of the water. Calculate Water Quality Value According to Watershed Watch group tolerance index score.