Boreholes play a vital role in public and private water supplies; in some cases, the same source has provided a reliable and cost-effective supply of water for over a hundred years. However, like everything else, wells and boreholes don’t last forever and they benefit from a little love, care and understanding to ensure continued service and to maximise their efficiency. Dr Phil Ham, principal hydrogeologist, Envireau Water, gives a practical guide to installing and rejuvenating a water supply borehole.