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Depth Provides an indication of the potential depth of flood water. Even shallow floodwater can be dangerous and can impact you and your property. Areas where there is not currently sufficient information to show the depth of floodwater are coloured grey....

Our groundwater monitoring networks ensure that Scotland’s groundwater supplies are adequately protected. SEPA’s nitrate monitoring network aims to identify areas affected by nitrate pollution, or at risk of being affected, and to find out if any improvement actions taken to address nitrate problems are effective. To achieve these aims, SEPA currently monitors 270 groundwater sites across Scotland

Velocity Indicates the speed of flood water and the direction in which it is travelling within Potentially Vulnerable Areas (PVAs). Velocity direction is available only within the river flood maps. It is sampled at a 150m resolution therefore cannot be used to identify detailed flow pathways. The velocity displayed on the river flood map shows the general speed and direction of flood water over a

Air Scottish Pollutant Release Inventory (SPRI) Radioactive substances Our radioactive substances data return forms were revised in March 2026. EASR sealed source data return (Excel, 49 kB) EASR radioactive waste data return(Excel, 80 kB) EASR intention to transfer radioactive waste/contaminated items for the first time (MS Word, 202 kB) Offshore data return (Excel, 59 kB) Waste Waste da

Marine aquaculture modelling Computer modelling is used as a guide to determining licensed discharge quantities of anti-parasitic chemicals and organic waste arising from marine fish-farm operations. The modelling tools promoted by SEPA provide robust predictions in most cases, requiring relatively little site-specific information. Nevertheless, the quality of the model outputs is dependent upon g

Continuous water quality monitoring equipment was deployed in the inner Clyde estuary adjacent to Govan in 2011. Low dissolved oxygen concentrations are known to occur in the inner Clyde estuary at this location as a result of the decomposition of organic wastes from discharges and urban run off. Limited mixing between fresh water and more dense saltwater leads to large differences between the sal

The SEPA Marine National Environmental Monitoring Buoy Network provides real time, high frequency environmental data from strategic locations around the coast, as part of SEPA obligations to monitoring the marine environment. What is being monitored? Continuous monitoring equipment gathers dissolved oxygen, water temperature, salinity and chlorophyll-a data at regular intervals. The data is stored

SEPA often receives environmental event notifications for issues for which are the statutory responsibility of other organisations. To help you get to the right place quickly the table below provides a quick guide to a number of issues, together with how you can contact the right organisation. Responsibilities by topic Responsibilities Organisations Abandoned vehicles Your local authority Y

Links Acronyms and abbreviations Glossary of terms European Waste Catalogue – for coding waste NACE and SIC codes Recovery and Disposal codes* Scottish Government guidance on applying the waste hierarchy Nomenclature of Units for Territorial Statistics (NUTS) areas(14kb) Waste strategy areas(86kb) *Recovery and Disposal codes Waste management activities are classed as recovery (R) or disposal (D

Find your National Grid Reference. Help in finding your NGR (National Grid Reference) Find your National Grid Reference (NGR) SEPA have developed a web based NGR tool using online maps to help determine a National Grid Reference. By entering your postcode a map of your area will displayed. By clicking on the map a 10 character National Grid Reference will be displayed for your use. Reading a National Grid Reference (NGR) The British National Grid System divides the Uni