Ireland Waste Water is a privately owned Irish company founded in Cork by Mary and Niall Mulcahy over thirty years ago.

We specialise in the design, manufacture and installation of high-quality precast concrete wastewater systems, including wastewater treatment systems, tertiary systems, septic tanks, interceptors, grease traps and rainwater harvesting systems. We also manufacture precast holding tanks for farm effluent, drinking water and other applications.

In addition to manufacturing, we install and maintain our full range of treatment systems, ensuring long-term reliability and performance for our customers.

Ireland Waste Water was the first Irish company to achieve CE Mark certification to EN 12566-3 for a sewage treatment tank and for the Circle 7 Tertiary Filter (I.S.EN12566-7) — a milestone that reflects our commitment to quality, compliance and innovation.

Our products are available in capacities ranging from 600L to 20,000L. There is a reason we continue to work with the same engineers, builders and groundworkers for over 30 years — our experience, reliability and consistently high-quality products set us apart.