They're among 113 areas that the agency thinks wastewater treatment should be prioritised.
Seven areas of the midlands are among 113 locations where Irish Water needs to prioritise wastewater treatment to protect public health and the environment.
Three of those are in each of Laois and Westmeath and one is in Offaly.
Ballyroan, Castletown, Portarlington, Kilcormac, Athlone, Ballymore and Multyfarnham are the ones that appear.
The Environmental Protection Agency's latest report also found that 19 large towns and cities, including Dublin and Cork, have failed to meet EU standards to prevent pollution.
Senior Inspector with the EPA, Noel Byrne, says despite some improvements, Irish Water has repeatedly revised its plans to fix infrastructure issues:
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