Article 9 of our Water Stress series is now up, and this one asks a question that becomes increasingly difficult the longer you think about it. What happens when there simply isn't enough water for everyone? Homes need water for drinking, washing and sanitation. Farmers need it to grow our food and water livestock. Rivers, ponds and wildlife need enough left in the environment to survive. Firefighters may need enormous quantities during exactly the hot, dry conditions causing the shortage. Industry and energy production need water, while new housing and data centres are adding new demands. So who gets priority? While writing the article, I realised there may be another question we should ask first: Who actually needs drinking-quality water? Do we really need to spend energy and money treating water until it is safe enough to drink, only to flush our toilets with it? Could rainwater water our gardens? Could greywater flush toilets? Could recycled water supply some industrial processes and cooling systems? Could farms store more winter rainfall for irrigation? Every alternative source potentially reduces the number of people and activities competing for the same drinking-water supply. But eventually, during a severe enough drought, difficult choices may still have to be made. And I don't think the answer is simply to produce a league table of homes, farms, wildlife, industry and technology. We need to understand what happens elsewhere in the system when we withhold water from each of them. If we stop irrigating a farm, what happens to food production? If we take more from a river, what happens to its ecosystem? If we restrict a factory, what does it produce? If a data centre needs water, what services depend upon it? And perhaps every major new development should have to answer another very simple question before it is built: Where will your water come from — particularly during a drought? 🔗 Read Article 9 — Who Gets the Water?