Most new smallholders plan their land around soil, crops, and livestock. Water supply is usually treated as something that is simply there — mains connection, a hose, perhaps a water butt. The experience of Spring 2025, the driest in England since 1893, made clear how quickly that assumption fails.
Quick Answer
The core problem: livestock require water continuously — a single dairy cow requires 50–100 litres per day; laying hens 250–500ml each. A mains supply failure or abstraction restriction during a drought means animal welfare is immediately at risk, not just crop production.
The trajectory: the UK Met Office projects average summer rainfall could fall 25% and summer river flows by 45% by 2050. Water abstraction licences are increasingly subject to restriction during dry periods. Mains supplies to farms are interrupted more frequently during drought. The smallholding that depends entirely on one source of water is increasingly exposed.
The practical response: diversify water sources before you need to. Rainwater harvesting from outbuilding roofs, a small holding tank or pond, and mulching to reduce crop irrigation need — together these reduce dependence on any single supply.
According to the Environment Agency’s June 2025 drought response, Spring 2025 across England was the driest since 1893, with farm irrigation reservoirs depleted early and abstraction licences subject to restriction as river flows fell below minimum requirements. AHDB’s livestock water supply guide is explicit: shallow boreholes can dry up in drought and watercourse abstraction can be restricted when flows fall below set criteria. In dry conditions, dependence on a single water source — mains, borehole, or abstraction — is a significant operational risk.
What Livestock Actually Need — and Why It Cannot Be Deferred
Irrigation is discretionary in an emergency — crops can be stressed and some yield lost. Livestock water is not. AHDB’s guide notes that livestock farms are classified as Category 4 Sensitive Customers for mains supply, given priority in supply interruptions because of animal welfare requirements. A laying hen requires 250–500ml per day in normal conditions; this rises substantially in heat. Sheep require 1–4 litres; a dry cow 30–40 litres. A water failure lasting 24–48 hours creates an immediate animal welfare crisis.
Four Water Sources — What Each Requires and What Each Risks
| Source | Suitable For | Risk in Drought | Requirements |
|---|---|---|---|
| Mains water | All uses — livestock, irrigation, domestic | Can be interrupted during system stress; most reliable overall | Metered; business account; follow water byelaws for livestock troughs to prevent backflow contamination |
| Borehole / groundwater | Irrigation, livestock with treatment | Shallow boreholes can dry up; deeper boreholes more reliable. Abstraction over 20,000 L/day requires Environment Agency licence | Drilling cost £5,000–£20,000+; pump; testing for quality; licence if above threshold |
| Surface water abstraction | Irrigation | High — Farmers Guide (July 2025): abstraction licences increasingly restricted in dry periods; summer 2022 and spring 2025 both triggered restrictions | Licence from Environment Agency; trickle irrigation no longer exempt |
| Rainwater harvesting | Irrigation, livestock (non-potable) | Low in drought — replenished by any rainfall event; useful as buffer | Collection from outbuilding roof area via gutters; IBC tanks or purpose-built tank; no licence required for roof collection |
Practical Responses That Cost Little to Start
What to Do
- Calculate your daily water use before you need to cut it— AHDB provides a farm water audit tool. A clear picture of daily requirements by livestock type and irrigation area is the starting point for any resilience planning
- Harvest rainwater from every outbuilding roof— an outbuilding with 50 square metres of roof captures roughly 35,000 litres per year in average UK rainfall. A 1,000-litre IBC tank costs under £100 used and connects directly to a standard downpipe. This is the lowest-cost water resilience measure available
- Mulch vegetable and fruit areas heavily— a 2–3 inch mulch layer on all growing areas significantly reduces irrigation need by retaining soil moisture. This is the most cost-effective way to reduce irrigation demand before investing in supply infrastructure
- Identify your water supply trigger points— at what point does a dry spell start affecting livestock welfare? What is your backup plan if the mains supply is interrupted? Knowing the answers before a drought means decisions are not made under pressure
- Check abstraction licence requirements now— if you abstract from any watercourse or from a borehole above 20 cubic metres per day, you require a licence. The Environment Agency is reviewing all licences; operating without one or exceeding licence conditions carries significant penalties
Common Mistakes
- Assuming mains supply is always available— it is not. Business water supplies are subject to interruption in drought conditions. Smallholdings with livestock should have a minimum of 48 hours of emergency water storage for animals
- Not separating potable and non-potable water systems— AHDB water regulations guidance specifies that installations intended for livestock or irrigation must be clearly marked as non-potable and physically separated from any connection to mains drinking water supply
- Installing a shallow borehole as the sole backup— shallow boreholes are the first to fail in drought. If investing in borehole infrastructure, depth is critical for reliability
Start Now
- Calculate daily livestock and irrigation water needs
- Connect at least one IBC tank to an outbuilding downpipe
- Check if any abstraction requires a licence
- Identify your emergency water backup for livestock
Longer Term
- Mulch all growing areas to reduce irrigation demand
- Build a written water plan before dry conditions arrive
- Explore DEFRA/Countryside Stewardship grants for water infrastructure
- Never rely on a single water source — diversify before you need to