This report, commissioned by the Countryside Council for Wales (CCW), presents the
data from the study of three lake sites in Clwyd, North Wales. Lake physical
characteristics, water chemistry and aquatic macrophytes were recorded at Llyn Helyg
(SJ 115774), Llyn Bedydd (SJ 471392) and Pant-yr-ochain Pools (SJ 348533).
All results presented here, except those for water chemistry, are based on one-off
sampling and surveys in July 2000. Recognized experts verified Charophyte and
Ranunculus specimens from Llyn Helyg. Water samples were collected on four occasions
(July 2000, Nov 2000, Feb 2001 and May 2001). Samples for TP, SRP, NO3 and Chl a
were frozen on site and analysed at the CEH laboratories, Penicuik
