Mayo

Settlements with Waste Water Discharge Authorisations ‐ Wastewater Treatment Capacity Register

Published June 2022
RegionCountySettlementCensus pop (2016)Wastewater Treatment Plant (WWTP)Reg #Indication of Available CapacityWWTP Project Planned/Underway
NW Mayo Castlebar 12,068 Castlebar WWTP D0047 • Green  
NW Mayo Ballina 10,171 Ballina (Mayo) WWTP D0016 • Green  
NW Mayo Westport 6,198 Westport WWTP D0055 • Green  
NW Mayo Claremorris 3,687 Claremorris WWTP D0071 • Green Yes
NW Mayo Ballinrobe 2,786 Ballinrobe WTTP D0070 • Green  
NW Mayo Ballyhaunis 2,366 Ballyhaunis WWTP D0069 • Green Yes
NW Mayo Newport 1,995 - D0224 • Red Yes
NW Mayo Swinford 1,394 Swinford WWTP D0068 • Green  
NW Mayo Foxford 1,315 Foxford WWTP D0213 • Green  
NW Mayo Kiltimagh 1,069 Kiltimagh WWTP D0217 • Green  
NW Mayo Crossmolina 1,044 Crossmolina WWTP D0073 • Green  
NW Mayo Charlestown-Bellahy 1,033 Charlestown WWTP D0214 • Green  
NW Mayo Béal An Mhuirthead 1,019 Belmullet WWTP D0074 • Green  
NW Mayo Knock 972 Knock WWTP D0065 • Green  
NW Mayo Balla 769 Balla WWTP D0216 • Amber  
NW Mayo Killala 562 - D0067 • Green  
NW Mayo Keel-Dooagh 541 Achill Island Central WWTP D0072 • Amber  
NW Mayo Louisburgh 434 Louisbourgh WWTP D0220 • Amber  
NW Mayo Shrule 432 Shrule WWTP D0359 • Green  
NW Mayo Kilkelly 373 Kilkelly WWTP D0357 • Green  
NW Mayo Ballindine 349 Ballindine WWTP D0355 • Amber  
NW Mayo Bangor Erris 306 Bangor Erris WWTP D0215 • Green  
NW Mayo Mulranny 289 Mallaranny WWTP D0218 • Green  
NW Mayo Gob An Choire 238

Achill Sound WWTP

D0511 • Green  
NW Mayo Belcarra 228 Belcarra WWTP D0366 • Green  
NW Mayo Ballycastle 219 Ballycastle WWTP D0356 • Green  
NW Mayo Lahardane 178 Lahardane WWTP D0380 • Green  
NW Mayo Kilmaine 147 Kilmaine WWTP D0361 • Green  
NW Mayo Conga 145 Cong WWTP D0066 • Green  
NW Mayo Doogort No data Doogort WWTP D0367 • Amber  
NW Mayo Aghagower Unavailable Aghagower WWTP A0010 • Green  
NW Mayo Ballycroy Unavailable Ballycroy WWTP A0009 • Green  
NW Mayo Bellavary 159 Bellavary WWTP A0012 • Green  
NW Mayo Bahola 203 Bohola WWTP A0557 • Green  
NW Mayo Bunnyconnellan 188 Bunnyconnellan WWTP A0015 • Green  
NW Mayo Gweesalia Unavailable Gweesalia WWTP A0555 • Green  
NW Mayo Hollymount Unavailable Hollymount WWTP A0011 • Green  
NW Mayo Irishtown 129 Irishtown WWTP A0038 • Green  
NW Mayo Kilmovee Unavailable Kilmovee WWTP A0025 • Green  
NW Mayo Moygawnagh Unavailable Moygawnagh WWTP A0040 • Green  
NW Mayo Old Head Unavailable Old Head WWTP A0074 • Green  
NW Mayo Roundfort Unavailable Roundfort WWTP A0056 • Green  
NW Mayo Toormakeady Unavailable Toormakeady WWTP A0058 • Green  
NW Mayo Turlough 229 Turlough WWTP A0054 • Green  
Region NW
County Mayo
Settlement Castlebar
Census pop (2016) 12,068
Wastewater Treatment Plant (WWTP) Castlebar WWTP
Reg # D0047
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Ballina
Census pop (2016) 10,171
Wastewater Treatment Plant (WWTP) Ballina (Mayo) WWTP
Reg # D0016
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Westport
Census pop (2016) 6,198
Wastewater Treatment Plant (WWTP) Westport WWTP
Reg # D0055
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Claremorris
Census pop (2016) 3,687
Wastewater Treatment Plant (WWTP) Claremorris WWTP
Reg # D0071
Indication of Available Capacity • Green
WWTP Project Planned/Underway Yes
Region NW
County Mayo
Settlement Ballinrobe
Census pop (2016) 2,786
Wastewater Treatment Plant (WWTP) Ballinrobe WTTP
Reg # D0070
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Ballyhaunis
Census pop (2016) 2,366
Wastewater Treatment Plant (WWTP) Ballyhaunis WWTP
Reg # D0069
Indication of Available Capacity • Green
WWTP Project Planned/Underway Yes
Region NW
County Mayo
Settlement Newport
Census pop (2016) 1,995
Wastewater Treatment Plant (WWTP) -
Reg # D0224
Indication of Available Capacity • Red
WWTP Project Planned/Underway Yes
Region NW
County Mayo
Settlement Swinford
Census pop (2016) 1,394
Wastewater Treatment Plant (WWTP) Swinford WWTP
Reg # D0068
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Foxford
Census pop (2016) 1,315
Wastewater Treatment Plant (WWTP) Foxford WWTP
Reg # D0213
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Kiltimagh
Census pop (2016) 1,069
Wastewater Treatment Plant (WWTP) Kiltimagh WWTP
Reg # D0217
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Crossmolina
Census pop (2016) 1,044
Wastewater Treatment Plant (WWTP) Crossmolina WWTP
Reg # D0073
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Charlestown-Bellahy
Census pop (2016) 1,033
Wastewater Treatment Plant (WWTP) Charlestown WWTP
Reg # D0214
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Béal An Mhuirthead
Census pop (2016) 1,019
Wastewater Treatment Plant (WWTP) Belmullet WWTP
Reg # D0074
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Knock
Census pop (2016) 972
Wastewater Treatment Plant (WWTP) Knock WWTP
Reg # D0065
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Balla
Census pop (2016) 769
Wastewater Treatment Plant (WWTP) Balla WWTP
Reg # D0216
Indication of Available Capacity • Amber
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Killala
Census pop (2016) 562
Wastewater Treatment Plant (WWTP) -
Reg # D0067
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Keel-Dooagh
Census pop (2016) 541
Wastewater Treatment Plant (WWTP) Achill Island Central WWTP
Reg # D0072
Indication of Available Capacity • Amber
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Louisburgh
Census pop (2016) 434
Wastewater Treatment Plant (WWTP) Louisbourgh WWTP
Reg # D0220
Indication of Available Capacity • Amber
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Shrule
Census pop (2016) 432
Wastewater Treatment Plant (WWTP) Shrule WWTP
Reg # D0359
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Kilkelly
Census pop (2016) 373
Wastewater Treatment Plant (WWTP) Kilkelly WWTP
Reg # D0357
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Ballindine
Census pop (2016) 349
Wastewater Treatment Plant (WWTP) Ballindine WWTP
Reg # D0355
Indication of Available Capacity • Amber
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Bangor Erris
Census pop (2016) 306
Wastewater Treatment Plant (WWTP) Bangor Erris WWTP
Reg # D0215
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Mulranny
Census pop (2016) 289
Wastewater Treatment Plant (WWTP) Mallaranny WWTP
Reg # D0218
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Gob An Choire
Census pop (2016) 238
Wastewater Treatment Plant (WWTP)

Achill Sound WWTP

Reg # D0511
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Belcarra
Census pop (2016) 228
Wastewater Treatment Plant (WWTP) Belcarra WWTP
Reg # D0366
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Ballycastle
Census pop (2016) 219
Wastewater Treatment Plant (WWTP) Ballycastle WWTP
Reg # D0356
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Lahardane
Census pop (2016) 178
Wastewater Treatment Plant (WWTP) Lahardane WWTP
Reg # D0380
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Kilmaine
Census pop (2016) 147
Wastewater Treatment Plant (WWTP) Kilmaine WWTP
Reg # D0361
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Conga
Census pop (2016) 145
Wastewater Treatment Plant (WWTP) Cong WWTP
Reg # D0066
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Doogort
Census pop (2016) No data
Wastewater Treatment Plant (WWTP) Doogort WWTP
Reg # D0367
Indication of Available Capacity • Amber
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Aghagower
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Aghagower WWTP
Reg # A0010
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Ballycroy
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Ballycroy WWTP
Reg # A0009
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Bellavary
Census pop (2016) 159
Wastewater Treatment Plant (WWTP) Bellavary WWTP
Reg # A0012
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Bahola
Census pop (2016) 203
Wastewater Treatment Plant (WWTP) Bohola WWTP
Reg # A0557
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Bunnyconnellan
Census pop (2016) 188
Wastewater Treatment Plant (WWTP) Bunnyconnellan WWTP
Reg # A0015
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Gweesalia
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Gweesalia WWTP
Reg # A0555
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Hollymount
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Hollymount WWTP
Reg # A0011
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Irishtown
Census pop (2016) 129
Wastewater Treatment Plant (WWTP) Irishtown WWTP
Reg # A0038
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Kilmovee
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Kilmovee WWTP
Reg # A0025
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Moygawnagh
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Moygawnagh WWTP
Reg # A0040
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Old Head
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Old Head WWTP
Reg # A0074
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Roundfort
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Roundfort WWTP
Reg # A0056
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Toormakeady
Census pop (2016) Unavailable
Wastewater Treatment Plant (WWTP) Toormakeady WWTP
Reg # A0058
Indication of Available Capacity • Green
WWTP Project Planned/Underway  
Region NW
County Mayo
Settlement Turlough
Census pop (2016) 229
Wastewater Treatment Plant (WWTP) Turlough WWTP
Reg # A0054
Indication of Available Capacity • Green
WWTP Project Planned/Underway  

Indication of Available Capacity

This register provides an indication of available wastewater treatment capacity based on loads received in 2021 and available treatment plan capacity now or by completion of a project by 2024 (where relevant).

• Green = spare capacity available.

• Amber = potential spare capacity to be considered on case by case basis.

• 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 June 2022.

General notes

  • The indication of available treatment capacity has been determined based on a standardised national review of the available information.
  • The information in this register is subject to change.
  • 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 Irish Water to determine the feasibility of connecting any particular site to the Irish Water network, feasibility should not be inferred from this register.

Reg #

Wastewater Discharge Authorisation Number