My Department does not compile information in the manner sought in the question. However, the issue of wastewater infrastructure in villages/settlements not serviced by Irish Water is a matter my Department is considering. I have instructed the relevant officials in my Department to prepare a report on this topic at national level. This will include a baseline survey of all rural local authorities to establish the numbers, size, national distribution and other environmental impacts for villages/settlements that do not have waste water collection and treatment infrastructure provided by Irish Water. I will be in a position to provide further update once I have received this report.