Aquatic macroinvertebrate count data by site for the Milltown Lake Catchment, Co. Monaghan, Ireland.

These data are macroinvertebrate count values for 26 sites on the Milltown Lake Catchment, Co. Monaghan, Ireland. Macroinvertebrates were identified to the level required by the Irish Environmental Protection Agency's Biotic Index Score (Q value). Count data are from 3 separate sampling events; May 2006, September 2006 and May 2007. Further information on sampling and processing methodologies, site descriptions and locations are available in the file, 'A Water Quality Assessment of Milltown Lake (Muckno Mill) Catchment, Co. Monaghan using Macrophyte and Macroinvertebrate Biological Indicators'.