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Rivers in eastern Scotland approaching critical low levels for the third time

SEPA’s latest weekly Water Scarcity Report shows that: 

• Six river catchments remain at Moderate Scarcity – the Deveron, Ythan, Don (Aberdeenshire), Esk, Firth of Tay and Tyne (Lothian).  
• There are now six catchments at Alert, with the Almond and Tweed joining Findhorn, Spey, Dee (Aberdeenshire) and Firth of Forth.  
• Orkney, Thurso and Clyde catchments have been raised to Early Warning. 

There are currently no restrictions on abstraction licence holders.  

Sustained low flows

This is the third time that parts of eastern Scotland have been approaching Significant Scarcity in 2025. The first was in May during a dry spell of hot, dry weather and it happened again in July after several weeks of high temperatures and little rain. On both occasions rainfall arrived just before regulatory action was required. However, river flows in these areas have never fully recovered to normal, leaving them vulnerable to the current conditions. 

Following a very dry autumn and winter, rivers entered spring with below-average levels. A dry spring and summer have compounded the situation. While the west is mostly back to normal conditions following rain at the start of June, rivers in the east remain particularly vulnerable due to the rain shadow effect and the way these rivers are fed by snowmelt and groundwater. Some eastern catchments experience rainfall levels similar to East Anglia, leaving them more susceptible to prolonged low flows. 

Recent rain has not been enough to offset months of low rainfall and high evaporation. In some areas, river levels remain well below what is typical for the time of year and the ground is dry, meaning much of the water from showers and downpours runs off quickly rather than soaking in. 

Assessing water scarcity

SEPA uses a combination of river flows, soil moisture, and groundwater data to determine water scarcity levels of Early Warning, Alert and Moderate Scarcity. 

To identify the most severe situations, SEPA uses DRAT (Drought Risk Assessment Tool) stations, which monitor river flows closely. If a DRAT station shows that river flow is at Q95 - a recognised low-flow threshold in hydrology - for 30 consecutive days the catchment is classified as experiencing Significant Scarcity. This science-led approach is used to track environmental conditions and help prevent lasting harm to rivers, lochs and the ecosystems that depend on them.  

If conditions do not improve and these areas move to Significant Scarcity, SEPA will need to take regulatory action. Measures may include limiting or temporarily suspending abstractions where necessary. These decisions will be based on sound science and environmental monitoring, including recognised hydrological low-flow thresholds based on river flow records that span decades. Restrictions will only be in place for the shortest time possible. 

SEPA continues to engage with abstraction licence holders to ensure that those in affected areas are informed and prepared. Everyone from farmers and producers to industry and manufacturers are urged to use water efficiently and manage this shared resource responsibly. Advice is available on SEPA’s website, as well as from SEPA staff contacting abstractors with licences in areas at risk. 

Eilidh Johnston, SEPA’s Senior Manager in Water Industry and Rural Economy, said:    

“Rivers in eastern Scotland remain under sustained pressure. Approaching Significant Scarcity for the third time this year in some areas highlights the vulnerability of eastern Scotland's water environment. We understand that after such a long period the message may feel repetitive, and it's easy to assume that rainfall will arrive in time to ease the pressure as it has before. But there's no guarantee that will happen this time. That's why it's vital that businesses continue to stay engaged, understand conditions in their area and take action where needed. 

“Throughout the spring and summer, we’ve been working closely with abstractors in the areas most at risk - including calling licence holders directly. We’ll also continue to work with organisations like NFUS, Scotch Whisky Association and Scottish Golf to ensure advice is shared and impacts are understood. Clear, early communication continues to be provided, so no one is caught off guard.  

“We know how important water is to the Scottish economy, particularly sectors like farming, food and drink, and energy. We also know that without a healthy water environment those sectors cannot thrive. As an effective regulator, our role is to balance the needs of businesses with the health of the environment they rely on. It is crucial that these environments do not become so stressed that they struggle to recover, which would reduce the water resources available to those businesses in the long term.” 

SEPA continues to urge all abstractors from farmers and producers to industry and manufacturers to use water efficiently and manage this shared resource responsibly. SEPA staff are contacting abstractors with licences in areas at risk and advice is available on SEPA’s website sepa.org.uk/waterscarcity.  

Notes to Editors

Q95 is a recognised benchmark in hydrology, which is used as a low flow threshold. It’s calculated by looking at a catchment’s 30-year dataset from 1991 to 2020 and looking at the lowest 5% of flows in that time frame.  

Water scarcity levels

• Early Warning: Conditions are drying. No action required, but abstractors should start preparing. 
• Alert: Water levels are falling. SEPA advises voluntary reductions in non-essential water use for abstractors. 
• Moderate Scarcity: Environmental impact is clear. Action from abstractors is expected to protect rivers and the species that rely on them. 
• Significant Scarcity: Critical river levels. Restrictions on abstraction licences may be imposed. 

Data sources

• SEPA Water Scarcity situation report - 14th August 2025
• SEPA’s river level network - Find Scottish water levels information
• Rainfall data for Scotland - Scottish Rainfall Data
• DRAT - Water scarcity data - provided by Scottish Environment Protection Agency

DRAT stations and Significant Scarcity

Significant scarcity is reached when river flows have been very low for 30 or more days. We use a tool called the Drought Risk Assessment Tool (DRAT) to set significant scarcity level. 

DRAT is a network of flow gauging stations that SEPA monitor across Scotland and are used to set significant water scarcity when flows have been low for a sustained period of time. 

Data has been collected at these stations for a long period of time, so this allows us to give context to what is currently happening with the amount of flow in rivers relative to what you would normally expect. 

The river flow stations are each used as a representation of the conditions over an area, called a significant water scarcity area. The area and representative gauging stations are displayed on the tool.

Further support and useful links

The National Water Scarcity Plan explains how water resources will be managed prior to and during periods of prolonged dry weather. This is to ensure the correct balance is struck between protecting the environment and providing resource for human and economic activity.

Report dry private water supplies and rivers and burns in your area to help SEPA assess water scarcity stress.

All water abstractors should be aware of the potential risk of water scarcity this summer, monitor their water use, and plan ahead for a range of weather conditions. Find further advice for abstractors and irrigators on our website.