Irfon pH test sites map
Irfon pH Jan 2020
Irfon pH March 2019
Restoring Water Quality in the Upper Wye & Irfon
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The Wye and Usk FoundationThe Right Bank, The SquareTalgarthBreconLD3 0BW
The Wye & Usk Foundation is a charity registered in England and Wales (no. 1080319).