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Priority catchments

Diffuse Pollution in the Rural Environment A programme of rural diffuse pollution work started in March 2010, to help deliver the objectives outlined in the River Basin Management Plans (RBMPs) for the Scotland and Solway-Tweed river basin districts. Diffuse pollution priority catchments have been identified by SEPA as catchments failing to meet environmental standards. Each catchment has a dedic

Biodiversity

Biodiversity sustains the natural systems that provide vital goods and services to society, supporting tourism, farming, forestry, aquaculture and fishing industries. It adds variety to our urban green spaces and contributes to improving the health and wellbeing of the people of Scotland. For all of these reasons, biodiversity is important to SEPA. SEPA is a key partner in the delivery of the Scot

Household waste data

Publication When reported When published Household waste summary data and text, pre-release access list and quality report 2024 28th October 2025 Household waste summary data and text, pre-release access list and quality report 2023 29th October 2024 Household waste summary data and textHousehold waste summary data 2022 17th October Pre-release access list 2022 17th October Household

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. Radioactive waste advisers are specialists in radioactive waste disposal and environmental radiation protection. There is a requirement under European law for people who manage radioactive substances to appoint advisers, known as ‘radiation protection experts’ to advise them on radiological protection. In the UK, radiation protection experts working in for radioactive waste management and environm

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 substances online notifications and applications

We're in the process of moving to our Beta website and information on applying for authorisations is now also available there in a new radioactive substances section. Use the back button in your browser to return to this page. Links to our forms and guidance will remain here for a period of time to support the transition. Notifications If you wish to notify SEPA of certain lower risk r

Protected areas

Information regarding water bodies designated as protected areas.

Information regarding water bodies designated as protected areas. A significant number of the water bodies in Scotland are designated as protected areas. This is because of their importance for special purposes such as wildlife conservation, drinking water supply, shellfish harvesting or bathing. These designated areas are vital to ensure that the diverse ecosystems and cultural and economic benefits contained within them are safeguarded. Protected areas are als

Activities exempt from waste management licensing

Information regarding activities that may be exempt from waste management licensing, and the statutory controls to prevent environmental pollution and harm to human health

Information regarding activities that may be exempt from waste management licensing, and the statutory controls to prevent environmental pollution and harm to human health From the 1st November 2025, you will no longer be able to apply for the exemptions listed on this page. The information on this page remains to help existing exemption holders comply with their legal obligations, before transitioning to the new Environmental Authorisation (Scotland) Regulation (EASR) framework for authorisations. To find out what authorisation you will need when your exemption exp

Invasive non-native species

What are invasive non-native species? Non-native species (NNS) are plants and animals which have been introduced (accidentally or deliberately) outside of their native range through human activity. Many non-native species contribute positively to our lives, as livestock, crops, timber, garden plants or pets. However, a small proportion (10-15%) of non-native species spread rapidly and cause damage

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

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