Wells, boreholes and taps: how clean water projects actually work

When we talk about "building a well", we are using shorthand for a much richer set of choices. The right answer in a mountain village is different from the right answer on a dry plain or in a crowded town. Here is a plain-English tour of the main options, and the questions that matter most.

#The main technologies

1. Protected hand-dug wells

   Dug by hand to reach shallow groundwater, then lined, sealed at the top and fitted with a pump or covered bucket system. Cheaper, but shallow water can dry up in the dry season and is more vulnerable to contamination.

2. Boreholes

   Narrow holes drilled by machine, often tens of metres deep, to reach aquifers below. Fitted with a hand pump for smaller communities or a solar or motorised pump feeding taps for larger ones. More expensive, usually more reliable.

3. Spring protection

   Where water emerges naturally from a hillside, a spring box can capture and protect it from contamination, then pipe it to a collection point.

4. Rainwater harvesting

   Gutters and storage tanks on schools, clinics and homes capture rain. Useful where rainfall is reliable, often alongside another source.

5. Small piped schemes

   A borehole or spring feeds a storage tank and a network of taps, bringing water closer to more homes. These need more management, often through a local water committee or utility.

#What happens before anyone digs

Good projects start with listening. The community says where water is needed and who will use it. Hydrogeologists survey the ground to judge where water is likely and how deep. Local government plans are checked, so the new source fits into wider services rather than competing with them.

Water quality is tested before a source is opened and at intervals afterwards. Some groundwater naturally contains substances such as fluoride or arsenic, so testing is not a formality.

#Why maintenance decides everything

A water point that breaks and is never repaired helps no one. Researchers and practitioners, including the Rural Water Supply Network (opens in a new tab), have long highlighted that a significant share of rural hand pumps are out of action at any one time. The causes are rarely mysterious: no budget for spare parts, no trained mechanic nearby, or unclear responsibility.

The projects that last usually have a water committee or service provider, a small user fee or other funding set aside for repairs, access to spare parts and a mechanic, and monitoring so that breakdowns are noticed quickly.

#Water, sanitation and hygiene belong together

Clean water does the most good when it comes with safe toilets and somewhere to wash hands. That is why the sector talks about WASH: water, sanitation and hygiene. Many strong projects include latrines at schools and clinics, and hygiene education led by local people.

#How we intend to work

The Light Of God will not drill wells ourselves. Our first clean water campaign aims to raise £5,000, to be delivered through an experienced, reputable partner that works with communities, tests water, and plans for maintenance. We have not selected that partner yet. When we do, we will publish who they are, what the money will fund and how it is going. You can read about the campaign and see our commitments on transparency.