Composting Toilets
Dry sanitation systems that separate urine and solids – no sewage connection needed.
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Ecological Water Solutions
Natural systems for sustainable water management
Herr Ltd designs and supplies rainwater harvesting, reed bed treatment, and ecological wastewater systems across the island of Ireland.
30+
Years experience
32
Counties served
100%
Ecological focus
What We Do
Ecological water systems for every need
From a single home to a large-scale development, we design systems that work in harmony with the Irish landscape.
Rainwater Harvesting
Capture roof rainwater and store it for toilet flushing, garden use, and more.
Learn moreReed Beds
Plant-based constructed wetlands that treat wastewater with no chemicals and low maintenance.
Learn moreUrine Treatment & Fertiliser
Recover and apply urine-derived nutrients as safe, effective fertiliser – closing the loop at source.
Learn moreRecycling Fertiliser
Treat and reuse bath, shower, and sink water for garden irrigation or toilet flushing.
Learn moreConsultancy
We advise architects, planners, and self-builders on integrated ecological water strategies tailored to your site.
Learn moreWorking with nature to manage water sustainably
Based in Dundalk, Co. Louth, Herr Ltd has been providing ecological water management solutions across Ireland for over two decades. Our approach harnesses natural processes - reed beds, living soils, and constructed wetlands - to treat and recycle water with minimal energy and maximum effectiveness.
We work with homeowners, self-builders, architects, and local authorities throughout the island of Ireland.
Talk to us about your projectNature has been treating water long before we arrived. Our job is simply to design systems that work with those processes, not against them.Herr Ltd, Co. Louth, Ireland
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Ready to work with nature?
Tell us about your project and we'll help you find the right ecological solution.