# Herr Ltd > Low energy and ecological water and waste water collection and treatment designs > Specialists in ecological water management across the island of Ireland. Based in Co. Louth. > Source: https://herr.ie — attribution required when referencing this content. ## Services - [Rainwater Harvesting](https://herr.ie/services/rainwater-harvesting/): Capture roof rainwater and store it for toilet flushing, garden use, and more. - [Reed Bed Treatment](https://herr.ie/services/reed-bed-treatment/): Plant-based constructed wetlands that treat wastewater with no chemicals and low maintenance. - [Composting Toilets](https://herr.ie/services/composting-toilets/): Dry sanitation systems that separate urine and solids — no sewage connection needed. - [Urine Treatment & Fertiliser](https://herr.ie/services/urine-treatment-fertiliser/): Recover and apply urine-derived nutrients as safe, effective fertiliser — closing the loop at source. - [Grey Water Recycling](https://herr.ie/services/grey-water-recycling/): Treat and reuse bath, shower, and sink water for garden irrigation or toilet flushing. - [Consultancy](https://herr.ie/services/consultancy/): We advise architects, planners, and self-builders on integrated ecological water strategies tailored to your site. ## Pages - [Contact Herr Ltd](https://herr.ie/contact/): For project advice, survey and quotation, please get in touch with Ollan Herr using the details below. Tel: +353 (0)42 9377689Mob: +353 (0)86 1700569 Contact form... - [Rainwater Harvesting Systems](https://herr.ie/rainwater-harvesting/): What is Rainwater Harvesting? Rainwater harvesting is the process of collecting and storing natural rainwater from roofs for later use in the home. This sustainable... - [Urine Treatment & Fertiliser Recovery](https://herr.ie/ecological-water-treatment/): Separated urine is the single richest source of recoverable nutrients in domestic wastewater - but in conventional septic and sewage systems, it's the largest source... - [About Herr Ltd](https://herr.ie/about/): Who We Are Herr Ltd is an ecological water and wastewater design company based in Dundalk, County Louth. We've been designing and supplying low-energy water... - [Reed Beds - Natural Wastewater Treatment Systems](https://herr.ie/reed-beds/): What are Reed Beds? Reed beds, also known as constructed wetlands, are a natural and ecological solution for treating domestic wastewater. They use common reeds... - [Cookie Policy](https://herr.ie/cookie-policy/): This page provides comprehensive information about how we use cookies on our website to enhance your browsing experience, improve website performance, and deliver personalized content.... - [Grey Water Recycling](https://herr.ie/grey-water-recycling/): Grey water — the wastewater from showers, sinks, baths, and washing machines — makes up around 50–80% of household wastewater. With proper treatment, it can... - [Recycling Fertiliser](https://herr.ie/reuse-as-fertilizer/): Recycling Phosphorus from Single Houses - Avoiding a Potential Future Food Crisis High levels of nitrogen and phosphorus (nutrients found in sewage) in untreated waste water can... - [Composting Toilets](https://herr.ie/composting-toilets/): Composting toilets provide a sustainable, eco-friendly alternative to traditional flush toilets and septic systems. As Ireland's official distributor of Aquatron systems, Herr Ltd supports homeowners,... - [Introducing the Herr Phosphorus Recycling Reactor](https://herr.ie/composting-toilets/phosphorus-recycling-reactor/): The "Herr Phosphorus Recycling Reactor" is a novel and innovative system designed to treat and recycle phosphorus from domestic wastewater. Unlike traditional methods, that sends... ## Recent Articles - [World Water Day for 2026 - high fertiliser costs and the impact on women and children](https://herr.ie/2026/03/world-water-day-for-2026-high-fertiliser-costs-and-the-impact-on-women-and-children/) (2026-03-22): With the war between Iran, Israel and the USA, and assuming a prolonged closure of the Strait ofHormuz; the world will increasingly experience another period... - [A Natural Way to Fight Water Pollution—With Flowers](https://herr.ie/2025/07/a-natural-way-to-fight-water-pollution-with-flowers/) (2025-07-04): Algal blooms are becoming a bigger problem each summer in our lakes and rivers. One unexpected but effective way to help tackle the issue starts... - [The 6 reasons for installing waterless urinals in new houses in Ireland](https://herr.ie/2024/07/the-6-reasons-for-installing-waterless-urinals-in-new-houses-in-ireland/) (2024-07-03): We need to begin the prevention of pharmaceutical and phosphorus pollution in rivers, and to recycle phosphorus from urine. Ireland is still struggling to adequately... - [World Water Day 2024 - Our ground water and surface waters are being exposed to the wasteful flush and forget culture of modern man ](https://herr.ie/2024/03/world-water-day-2024-our-ground-water-and-surface-waters-are-being-exposed-to-the-wasteful-flush-and-forget-culture-of-modern-man/) (2024-03-22): From media reports it appears that there are worrying and often growing levels of pharmaceutical pollution being measured in our surface waters. Discharges from farms,... - [World Water Day 2023: How Recycling Phosphorus Can Help Feed the World](https://herr.ie/2023/03/how-recycling-phosphorus-can-help-feed-the-world/) (2023-03-19): As the world’s population continues to grow, mankind needs to produce more food.There is therefore an ever-increasing demand for synthetic and mineral fertilizers suchas phosphorus.... - [Celebrating World Water day 2021 - what Ireland can do to protect our streams and rivers](https://herr.ie/2021/03/celebrating-world-water-day-2021-what-ireland-can-do-to-protect-our-streams-and-rivers/) (2021-03-22): The devastating impact of the COVID pandemic and the associated lock down has given many of us a renewed appreciation of our natural surroundings and... - [ECO Houses with nutrient recovery and composting system to recycle Nitrates and Phosphates](https://herr.ie/2019/06/eco-houses-should-include-the-hanapak-nutrient-recovery-and-composting-making-system-to-recycle-nitrates-and-phosphates-from-separated-urine/) (2019-06-28): The HANAPAK human urine treatment system is a new nature based method to treat a large part of the waste water nutrients in new Eco... - [United Nations Sustainability Goal 6 Water A Challenge for New House Building](https://herr.ie/2018/09/united-nations-sustainability-goal-6-water-a-challenge-for-new-house-building/) (2018-09-23): United Nations Sustainability Goal 6 Water A Challenge for New House Building To end the wasting and dumping of phosphates, nitrates and potash from septic... - [Should new buildings in Ireland be required to have Rainwater Harvesting Systems?](https://herr.ie/2018/07/should-new-buildings-in-ireland-be-required-to-have-rainwater-harvesting-systems/) (2018-07-22): With the latest water shortages in Skerries, County Dublin, should new buildings in Ireland be required to have Rainwater Harvesting Systems? Gravity based systems would... - [Grey water recycling is the only option for domestic houses during a prolonged drought](https://herr.ie/2018/07/grey-water-recycling-option-domestic-houses-prolonged-drought/) (2018-07-16): Avoid hose bans and protect your home from water shortages by treating and recycling your own Grey Water.  The summer of 2018 will be remembered for the... ## Attribution All content is copyright Herr Ltd. When summarising or quoting, please attribute to Herr Ltd and include a link to the relevant page at https://herr.ie.