Mayo

Settlements with Waste Water Discharge Authorisations ‐ Wastewater Treatment Capacity Register

The spare capacity available to treat additional loads at the treatment plants changes regularly based upon the loads received from new and existing customers. This register is only an indication of available capacity based on available information at the date of issue and is subject to change.

This register cannot be taken as confirmation that capacity is available for a particular development. In all instances if you are considering progressing a development you should contact our Connection and Developer Services team who  will provide an up-to-date view, and greater level of detail, in relation to the availability of capacity.

This register provides wastewater treatment capacity information only and does not provide an indication of network capacity. In cases where a new development is planned, we may need to make upgrades to the wastewater network to support the collection of the new load and to mitigate the risk of flooding from occurring to our existing infrastructure. We assess whether the wastewater network can support a new development  during the connections process.

Learn more about the Pre Connection Enquiry and Connection Application process in the Connections section of this site.

At all times an executed Connection Agreement with Uisce Éireann is required to ensure a connection can be made and capacity is available for your development. All new Connections are subject to UÉ’s Connections Charging Policy and at all times the issue of a connection offer is a matter for the discretion of UÉ.

Published
RegionCountySettlementWastewater Treatment Plant (WWTP)Reg #Indication of Available CapacityWWTP Project Planned/Underway
NWMayoCastlebarCastlebar WWTPD0047• Green 
NWMayoBallinaBallina (Mayo) WWTPD0016• Green 
NWMayoWestportWestport WWTPD0055• Green 
NWMayoClaremorrisClaremorris WWTPD0071• GreenYes
NWMayoBallinrobeBallinrobe WTTPD0070• Green 
NWMayoBallyhaunisBallyhaunis WWTPD0069• GreenYes
NWMayoNewport‐D0224• RedYes
NWMayoSwinfordSwinford WWTPD0068• Green 
NWMayoFoxfordFoxford WWTPD0213• Green 
NWMayoKiltimaghKiltimagh WWTPD0217• Green 
NWMayoCrossmolinaCrossmolina WWTPD0073• Green 
NWMayoCharlestown-BellahyCharlestown WWTPD0214• Green 
NWMayoBéal An MhuirtheadBelmullet WWTPD0074• Green 
NWMayoKnockKnock WWTPD0065• Green 
NWMayoBallaBalla WWTPD0216• Amber 
NWMayoKillalaKillala WWTPD0067• Green 
NWMayoKeel-DooaghAchill Island Central WWTPD0072• Amber 
NWMayoLouisburghLouisbourgh WWTPD0220• Amber 
NWMayoShruleShrule WWTPD0359• Green 
NWMayoKilkellyKilkelly WWTPD0357• Green 
NWMayoBallindineBallindine WWTPD0355• Amber 
NWMayoBangor ErrisBangor Erris WWTPD0215• Green 
NWMayoMulrannyMallaranny WWTPD0218• Green 
NWMayoGob An ChoireAchill Sound WWTPD0511• Green 
NWMayoBelcarraBelcarra WWTPD0366• Green 
NWMayoBallycastleBallycastle WWTPD0356• Green 
NWMayoLahardaneLahardane WWTPD0380• Green 
NWMayoKilmaineKilmaine WWTPD0361• Green 
NWMayoCongaCong WWTPD0066• Green 
NWMayoDoogortDoogort WWTPD0367• AmberYes
NWMayoAghagowerAghagower WWTPA0010• Green 
NWMayoBallycroyBallycroy WWTPA0009• Green 
NWMayoBellavaryBellavary WWTPA0012• Green 
NWMayoBoholaBohola WWTPA0557• Green 
NWMayoBunnyconnellanBunnyconnellan WWTPA0015• Green 
NWMayoGweesaliaGweesalia WWTPA0555• Green 
NWMayoHollymountHollymount WWTPA0011• Green 
NWMayoIrishtownIrishtown WWTPA0038• Green 
NWMayoKilmoveeKilmovee WWTPA0025• Green 
NWMayoMoygawnaghMoygawnagh WWTPA0040• Green 
NWMayoOld HeadOld Head WWTPA0074• Green 
NWMayoRoundfortRoundfort WWTPA0056• Green 
NWMayoToormakeadyToormakeady WWTPA0058• Green 
NWMayoTurloughTurlough WWTPA0054• Green 

Indication of Available Capacity

This register provides an indication of available wastewater treatment capacity based on loads received in 2023 and available treatment plan capacity now or by completion of a project at construction (where relevant).

• Green = spare capacity available.

• Amber = potential spare capacity, additional analysis of applications may be required on an individual basis considering their specific load requirements. Potential availability of capacity in this case would be dependent on any additional load not resulting in a significant breach of the combined approach as set out in Regulation 43 of the Waste Water Discharge (Authorisation) Regulations 2007, which is a matter for the relevant Planning Authorities to determine.

• Red = no spare capacity available at present.

WWTP Project Planned/Underway

Project planned or underway to increase capacity and/or improve treatment performance, based on available information in December 2024.

General notes

• The information in this register has been determined based on a standardised national review of the available information and is subject to change. It is indicative only, non-binding and should not be relied upon.
• This register provides commentary on the available capacity at the WWTP, it does not consider the capacity of the sewer network.
• A Pre-Connection Enquiry should be submitted to Uisce Éireann (UÉ) to determine the feasibility of connecting any particular site to the UÉ network, feasibility should not be inferred from this register. Note that a positive response to a Pre-Connection enquiry does not guarantee that a connection can be facilitated in future – an executed Connection Agreement with UÉ is required to ensure a connection can be made and capacity is available for your development. All new Connections are subject to UÉ’s Connections Charging Policy and at all times the issue of a connection offer is a matter for the discretion of UÉ. 
• Should there be a material change to the indication of available capacity during the course of the year, this will generally be updated in the web version of the register and the relevant Local Authority will be notified. 

Reg #

Wastewater Discharge Authorisation Number

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