Tiny Insects, Big Impact: Cedarville Study Explores Midges as Water Pollution Indicators

Water quality remains one of the most pressing environmental challenges in the United States, costing more than $35 billion annually in mitigation and treatment efforts. At Cedarville University, a team of researchers is exploring innovative solutions to monitor and prevent water pollution using an unexpected yet highly effective indicator: midges.

Midges, small aquatic insects of the family Chironomidae, spend most of their life cycle as larvae in freshwater streams before emerging as non-biting adult flies. Because these larvae derive nutrients directly from their surrounding water, they can serve as indicators of environmental conditions. Cedarville faculty members and students are working to identify midges at the species level across Ohio, map their geographic distribution and determine their tolerance to varying stream conditions, including pollution levels.