The Environment Agency has issued a drought permit to South West Water to help secure the public water supply at Wimbleball Reservoir. The reservoir, which serves 390,000 people, is experiencing exceptionally low levels for this time of year, standing at 18% total storage capacity as of 4 October, compared to 30% at the same time last year.
The permit allows South West Water to temporarily pause normal compensation flow to the River Haddeo. This is conditional on releasing an equivalent volume downstream to support abstraction from the River Exe for public supply. These measures aim to conserve Wimbleball’s water storage, with conditions in place to protect the Haddeo, the Exe, and their associated habitats and wildlife.
However, the Environment Agency has stressed that the permit alone is insufficient to guarantee supplies, and South West Water must adhere to its drought plan. The company has also applied to Defra for a non-essential use ban, which would restrict water usage for certain businesses across Mid Devon, parts of East Devon, and Dorset.
The National Drought Group, with Environment Agency representation, continues to meet weekly to coordinate the sector's response. The government's strengthened Water Bill also plans wholesale reform of the industry.
The Environment Agency is closely monitoring water companies to ensure compliance with statutory drought plans, including enhanced monitoring and faster processing of drought permit applications, balancing public supply needs with environmental protection.
“"Drought has not gone away with the arrival of autumn and the rain that would normally accompany the change in season. Steps must be taken to secure public water supply and we are keeping a close eye on the environment, ready to respond to signs of impact and distress. The goal is to get the most out of our water supplies and that means being extra careful in how we use it. This applies to everyone."
The UK's weather forecast for October is expected to be changeable. The upcoming winter is crucial for water resource recovery. Above-average rainfall in Devon, Cornwall, and the Isles of Scilly this winter could see the area move into a fragile recovery state by April 2027. Conversely, the region might enter the dry months with a water deficit.
South West Water initially applied for the drought permit on 16 September, amending it 13 days later. Due to the worsening situation, an urgency case was applied for on 1 October, removing the need for public examination of objections. The permit, granted on 2 October, will remain in effect until 28 February 2027 unless withdrawn earlier.
Drought permits and orders are legal mechanisms providing flexibility in managing water resources during exceptional rainfall shortages. Water companies can apply to the Environment Agency for permits to alter abstraction conditions or sources.
