Group One Taxa - Pollution Sensitive Organisms

Please choose from the following list for additional information:

• Caddisfly Larvae (Order Trichoptera)
• Dobsonfly Larvae (Family Corydalidae)
• Mayfly Nymphs (Order Ephemeroptera)
• Water Penny Beetle Larvae (Family Psephenidae)
• Riffle Beetles (Family Elmidae)
• Stonefly Nymphs (Order Plecoptera)
• Other Snails (Class Gastropoda)

Biological Indicator Organisms Page