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Aquatic Classification

There are a number of significant environmental problems caused by a number of pressures, including diffuse and point source pollution, alterations to beds, banks and shores, alterations to water levels and flows and the presence of invasive non-native species. In order to measure these pressures and their potential effects, we use an aquatic classification system which covers rivers, lochs, estuaries, coastal and groundwater bodies. These are split into management units called water bodies, with a classification produced for each body (the number of water bodies between years varies slightly, as some water body boundaries are reviewed to ensure that they can be managed appropriately).

There are a number of significant environmental problems caused by a number of pressures, including diffuse and point source pollution, alterations to beds, banks and shores, alterations to water levels and flows and the presence of invasive non-native species. In order to measure these pressures and their potential effects, we use an aquatic classification system which covers rivers, lochs, estuaries, coastal and groundwater bodies. These are split into management units called water bodies, with a classification produced for each body (the number of water bodies between years varies slightly, as some water body boundaries are reviewed to ensure that they can be managed appropriately). We produce an annual Water Framework Directive (WFD) Classification for all the water bodies in Scotland. Classification results for 2007 to the current year can be found on the Water Classification Hub. Read the State of Scotland's Water Environment 2024 summary report (MS Word, 1.17 MB). Most of our water environment is already in a good condition and subject to fewer pressures than most other E

Radioactive waste advisers

There is a requirement under European law for people who keep or use radioactive material, or who accumulate or dispose of radioactive waste, to appoint advisers, known as ‘radiation protection experts’ to advise them on radiological protection.

There is a requirement under European law for people who keep or use radioactive material, or who accumulate or dispose of radioactive waste, to appoint advisers, known as ‘radiation protection experts’ to advise them on radiological protection. This content has moved to our BETA website. Visit our new Radioactive substances topics page or our EASR authorisations page....

Modelling

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

Zero Waste

SEPA works with the Scottish Government and Zero Waste Scotland to achieve the objectives and targets of the Zero Waste Plan, published in 2010. We have a wide range of responsibilities including regulating waste management activities such as landfills, incinerators and the export of waste, administering the producer responsibility schemes for packaging, WEEE and batteries, collecting and interpre

Technical guidance

Further technical guidance This page brings together a number of ancillary guidance documents and previous email bulletin information relating to modelling of marine fish-farms for CAR licence applications. Auxiliary biomass sampling transect In areas where the tidal residual current is weak, the auxiliary transect (site-specific sampling 2) may be aligned along a bearing reciprocal to the primary

Submit data

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

Reservoirs

The majority of dams will require an authorisation from SEPA under "The Water Environment (Controlled Activities)(Scotland) Regulations 2011 (CAR). This authorisation number will start CAR/.../... If you don't have a CAR authorisation for your dam, then you should contact your local SEPA team to discuss this. You can find more advice on impoundments and water resources authorisations on our Enviro

Previous classification schemes

Before the introduction of the Water Framework Directive, SEPA had a number of classification schemes which we used to report the status of Scotland's water environment.

Before the introduction of the Water Framework Directive, SEPA had a number of classification schemes which we used to report the status of Scotland's water environment. Before the introduction of the Water Framework Directive, SEPA had a number of classification schemes which we used to report the status of Scotland's water environment. Classification schemes Coastal water quality Estuarine water quality Loch water quality River water quality Water quality classification results 2006 2005 2004 2003 2002 2001 1996 - 2000 classifications River classification E

Land

Through its ability to filter and retain nutrients, land helps to protect air and water quality, support habitats and enhance biodiversity. Healthy, well-managed land also plays an important part in flood risk management.

Through its ability to filter and retain nutrients, land helps to protect air and water quality, support habitats and enhance biodiversity. Healthy, well-managed land also plays an important part in flood risk management. We are transitioning to a new website, and some content from this section is now on our Beta site. Land quality – defined by its ability to sustain and fulfil a variety of uses – is vital to health and wellbeing. Through its ability to filter and retain nutrients, land helps to protect air and water quality, support habitats and enhance biodiversity. Healthy, well-managed land also plays an

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