Mid Wales


Stretching up into the breath-taking Elan Valley and Brecon Beacons National Park, our mid Wales region, is surrounding by some of Wales’ most beautiful and rural scenery.

Example of investment in area:

  • Norton and Presteign Wastewater Treatment Works - we have completed an investment of £3.7m to convert Norton WwTW into a pumping station which now passes flow onto Presteigne WwTW for enhanced treatment. Presteigne WwTW has been upgraded with a £3.5m investment to introduce phosphorous removal to the treatment process due to be completed this year. This is part of a wider £64m investment plan in this Asset Management Period (2020-2025) to improve the river water quality of the River Wye & River Lugg under the Water Framework Directive which includes for improvements at Builth Wells WwTW, Rhayader WwTW and Clyro WwTW in the mid Wales area alongside treatment works in the Hereford area.
  • We have undertaken an extensive water quality modelling programme to identify what the main sources of phosphorus are in the river and where it is best to target our investment now and in the future. We are also supporting the work of the Wye Nutrient Management Board and Technical Advisory Group with evidence from our modelling and expertise on how we can best contribute to restoring the river to a favourable condition. We will provide similar support to the new Nutrient Management Boards that are currently being established for the other failing Welsh freshwater special areas of conservation on the Usk and Tywi.

Building upon the success of our Event Duration Monitor (EDM) installation programme (2019-2020) we are currently investing £42m across Wales in our Storm Overflow Assessment Framework (SOAF). Over the next 5 years (2020-2025) this programme will use data from the EDM sites to prioritise wastewater assets for investigation, with the aim to reduce both the number and volume of storm water discharges to the environment. This will improve both watercourse amenity value and water quality overall.

We are currently undertaking 42 investigations into a prioritised list of EDM trigger assets within the Mid Wales area.

A £19m investment has been started to install Pass Forward Flow monitoring on over 300 wastewater treatment works to enable us to monitor our compliance against our flow permits and assess whether we’re fully utilising the treatment works full treatment capacity prior to spilling to storm. This investment will take up to 3 years to complete. Pass forward flow is the minimum flow that an asset is required to pass forward before spilling to storm to ensure it remains compliant.

Our 2021 data is below..

Name Duration (Hours & Minutes) Releases Per Annum
Bridge Street Crickhowell 3 Hours 30 Minutes 10
Brecon Showfields - Brecon 262 Hours 30 Minutes 45
Brecon WwTW 1390 Hours 45 Minutes 79
Brecon - East Dorlangoch - Hours - Minutes -
Forge Rd Crickhowell 843 Hours 30 Minutes 145
Crickhowell WwTW 903 Hours 30 Minutes 112
Brecon - Main SPS Canal Rd 278 Hours 15 Minutes 66
Crai WwTW 1 Hours 45 Minutes 4
Trecastle 592 Hours 0 Minutes 86
Talybont 130 Hours 30 Minutes 30
Dyffryn Rd Llandrindod Wells 226 Hours 15 Minutes 57
North Road - North Rd Builth Wells 14 Hours 0 Minutes 7
The Strand - Church St Builth Wells 170 Hours 30 Minutes 48
Bronllys Road Talgarth 3 Hours 15 Minutes 7
A479 Bronllys Rd Talgarth 0 Hours 0 Minutes 0
Llanfrynach WwTW 204 Hours 45 Minutes 25
Trecastle Brynawel Estate Brynawelon 30 Hours 45 Minutes 4
Talybont Cattle Market Hereford 7 Hours 45 Minutes 5
Rhayader - Wye View Terrace 0 Hours 0 Minutes 0
Llanelwedd - Scout Hut Station Road 38 Hours 45 Minutes 4
Llanelwedd - Primary School Bridge 149 Hours 15 Minutes 28
Llanddewi Toll House 730 Hours 0 Minutes 64
Llandrindod Wells - Crabtree Green 3 Hours 30 Minutes 1
Bullpit Meadow Crickhowell 3 Hours 0 Minutes 7
Legar Crickhowell Crickhowell 1071 Hours 45 Minutes 111
Llangurig 371 Hours 30 Minutes 57
Coed-Yr-Ynys Llangynidr 104 Hours 30 Minutes 43
Cefn Gorwydd WwTW 109 Hours 0 Minutes 26
Crossgates Powys 159 Hours 45 Minutes 33
Park Lane Llandrindod Wells 79 Hours 30 Minutes 37
Cilmery WwTW 1314 Hours 45 Minutes 153
Sennybridge Army Camp Sennybridge 1150 Hours 15 Minutes 123
HAY ON WYE - GLASBURY 436 Hours 0 Minutes 40
Glasbury Hay On Wye 0 Hours 45 Minutes 1
Beulah Powys 2027 Hours 0 Minutes 206
Llandrindod Wells WwTW 0 Hours 30 Minutes 2
Three Cocks Powys 89 Hours 30 Minutes 27
Talgarth Brecon 117 Hours 45 Minutes 22
Hay On Wye 559 Hours 30 Minutes 183
Llyswen - Church Road 37 Hours 0 Minutes 7
Clatterbrune Estate Presteigne 121 Hours 45 Minutes 19
Llangammarch Wells WwTW 1085 Hours 45 Minutes 73
Llangynllo Kington 2414 Hours 15 Minutes 139
Llanwrtyd Wells Powys 1784 Hours 15 Minutes 127
Abernant Lake Llanwrtyd Wells 1805 Hours 30 Minutes 139
Dolwen Fields Llanwrtyd Wells 194 Hours 0 Minutes 50
Llanyre WwTW - Hours - Minutes -
Rhayader 885 Hours 30 Minutes 80
Caphon Bridge Ystradgynlais 202 Hours 0 Minutes 49
Pontneddfechan Neath 1525 Hours 0 Minutes 171
Cynghordy WwTW 795 Hours 30 Minutes 102
Ystradgynlais Nr Gough Arms 135 Hours 30 Minutes 33
Claypon Bridge Ynyscedwyn 100 Hours 45 Minutes 16
Mason Arms Ystradgynlais 121 Hours 0 Minutes 21
Waun Gyrlais Penrhos Swansea 108 Hours 15 Minutes 30
Ystradgynlais Penrhos 122 Hours 0 Minutes 17
Swansea - Abercrave 1239 Hours 15 Minutes 130
Penycae - Swo.M'Hole 14 Abercrave St.Davids C 117 Hours 0 Minutes 19
Machynlleth - Popular Road 22 Hours 0 Minutes 42
Machynlleth - Doll Street 252 Hours 30 Minutes 60
Machynlleth - Heol Penrallt 0 Hours 0 Minutes 0
Ceinws Esgairgeiliog 388 Hours 45 Minutes 35
Machynlleth 733 Hours 15 Minutes 94
Pandy WwTW 64 Hours 15 Minutes 13
Newbridge on Wye WwTW 166 Hours 45 Minutes 38
Bronllys 82 Hours 45 Minutes 58
Rhayader - St. Brides 10 Hours 0 Minutes 10
Three Cocks - Gwernyfred Park 6 Hours 15 Minutes 2
Trefecca - Old Railway 83 Hours 30 Minutes 34
Tanyard Presteigne 15 Hours 30 Minutes 4
Howey 331 Hours 30 Minutes 45
Builth Wells 1181 Hours 15 Minutes 96
Brecon - Supermarket 51 Hours 30 Minutes 46
Crickhowell - Upstream of Garn SPS 34 Hours 45 Minutes 17
Aberbaiden WwTW 415 Hours 30 Minutes 58
Rhayader WwTW 157 Hours 45 Minutes 37
Sennybridge WwTW 2 Hours 15 Minutes 6
Crickhowell - Bridge End Car Park 21 Hours 0 Minutes 6
Llyswen - Church Road 252 Hours 15 Minutes 57
Crickhowell - Garn SPS EO 136 Hours 45 Minutes 56
Llandrindod Wells - Ddole Road 641 Hours 30 Minutes 58
Erwood - A470 110 Hours 15 Minutes 25
Rhayader - Mill Street 48 Hours 30 Minutes 11
Llandrindod Wells - Temple Street 208 Hours 15 Minutes 60
Llangorse - Llynfi Bridge 1 Hours 15 Minutes 1
Llandrindod Wells - near Rock Park Close 242 Hours 30 Minutes 53
Norton WwTW 1 Hours 30 Minutes 2
Llanwrthwl WwTW 0 Hours 0 Minutes 0