There were over 30,000 wastewater treatment systems in Laois, Offaly and Westmeath at the end of 2022, according to the CSO.
The midlands accounted for just over 5% of new waste water treatment systems in 2022.
345 new systems were registered in the region last year, according to new figures from the CSO.
As of the end of 2022, there were 32,150 registered domestic waste water treatment systems in the midlands - 12,070 of those are in Westmeath, 10,086 in Laois and 9,994 are in Offaly.
Nationally, there was a 1.2% increase in the number of waste water treatment systems.
Management Can Easily End Industrial Action - SIPTU
Westmeath Credit Union Manager Wins Lifetime Achievement Award
Midlands Readers Encouraged To Take Part in MS Readathon
Westmeath Town Strong Performer For Fibre Broadband
Ireland's Oldest Living Person With EB Publishes Autobiography
Fund Midlands Councils To Build Housing On Public Land - Simon Community
Midlands Councils Boost Environmental Enforcement Performance
Offaly Food Workers Launch Industrial Action
Public Consultation Taking Place In The Midlands
Man Due In Court Over Armed Pharmacy Robbery In Offaly
Offaly Man Appointed President Of EU Body
Rising Rents Affecting Midlands HAP Tenants
Calls To Fast Track Wastewater Works After Flooding In Offaly
Man Arrested After Attempted Armed Robbery In Offaly
Westmeath Carpark To Reopen As Drainage Project Nears Completion
Midlands CPO's Up Significantly
Midlands Bring Home 2025 Heritage Awards
Offaly Attraction Appoints New General Manager
Midlands MEP Urges Better Pay For Construction Apprenticeships
European Commission Propose CAP Funding Boost