Southern Water Drought Measures: Precautionary Steps Explained

Southern Water has applied to the Department for Environment, Food & Rural Affairs (Defra) for a Drought Order and a Non-Essential Use Ban (NEUB) covering Hampshire and the Isle of Wight. The move follows the Environment Agency declaring more than half of England in drought, with the company framing the application as a precautionary step to “protect water supplies and the environment.”

Hampshire and the Isle of Wight were among seven English regions declared to be in drought conditions last month. The proposed measures are not yet in force, and the company has stressed that the application does not guarantee they will be introduced. A spokesperson told the BBC: “These are precautionary measures and making an application does not mean they will be introduced. However, we must follow the regulatory process to protect water supplies and the environment if dry conditions persist.”

What the Non-Essential Use Ban would mean for businesses

Unlike hosepipe bans, which mainly restrict household activities like watering gardens or washing cars, NEUBs specifically target businesses. According to water regulator Ofwat, if the ban comes into force, businesses would have to stop using water for activities including:

• Filling or maintaining a non-domestic swimming pool, paddling pool, or pond
• Operating a mechanical vehicle washer
• Cleaning any vehicle or non-domestic premises

These restrictions are designed to reduce non-essential water consumption while protecting critical supplies. The consultation period runs from Tuesday 4 to 11 August, giving businesses and residents a chance to respond before any final decision.

Why the River Test is central to the application

The River Test, the longest chalk stream in the UK, rises at Ashe near Basingstoke and flows 40 miles to Southampton Water. Southern Water says protecting the river remains one of its “highest priorities.” The Drought Order would allow the company to continue taking water from the Test even if river flows drop lower, a critical measure for maintaining supply during prolonged dry conditions.

Chalk streams like the Test are ecologically sensitive, and low flows can harm fish populations and aquatic plants. The precautionary approach reflects the need to balance water supply for customers with environmental protection, a tension that is becoming more pronounced as drought events become more frequent.

Leakage reduction: 4,000 repairs and a 30% drop

Southern Water has also highlighted its broader efforts to reduce water loss. The company has repaired 4,000 leaks and reduced leakage by about 30% over the past two years. While these efforts are not directly linked to the drought measures, they form part of the company’s strategy to “do everything possible to protect water supplies.”

Reducing leakage is a key component of water resource management, especially during drought. The company says it is also helping customers save water, though specific programs were not detailed in the announcement.

Regulatory context and next steps

The application to Defra is a formal step in the regulatory process. The consultation window is short, reflecting the urgency of the situation. If the Drought Order is granted, Southern Water would gain the legal authority to implement the NEUB and continue abstraction from the Test under lower flow conditions.

This is not the first time UK water companies have sought such measures during dry spells, but the scale of the current drought—more than half of England affected—makes the precautionary approach particularly significant. The outcome will depend on the consultation responses and Defra’s assessment of the environmental and supply risks.

For businesses in Hampshire and the Isle of Wight, the message is clear: prepare for potential restrictions, even though they are not yet in force. The consultation is an opportunity to voice concerns or suggest adjustments before any final decision.

As the climate continues to shift, such measures may become more common. The balance between water supply, environmental protection, and economic activity is a delicate one, and Southern Water’s application is a test case for how regulators and utilities respond to prolonged drought.

For more on how extreme weather is affecting infrastructure and energy, see our analysis of Southern Europe’s extreme heat and its economic impact. And for a look at how technology is helping manage resources, check out Downing Street’s tech agenda.