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Long-term river water quality indicator
SEPA publishes a long-term river water quality indicator, based on a network of sites covering 253 water bodies (rivers or sections of rivers). This indicator is based on a consistent set of five water quality parameters which are sensitive to organic pollution, nutrients and toxic substances, and which provide a measure of species diversity across approximately 10% of all water bodies.
SEPA publishes a long-term river water quality indicator, based on a network of sites covering 253 water bodies (rivers or sections of rivers).
This indicator is based on a consistent set of five water quality parameters which are sensitive to organic pollution, nutrients and toxic substances, and which provide a measure of species diversity across approximately 10% of all water bodies.
Monitoring
In 2011, the Scottish Environment Protection Agency (SEPA) established an indicator of river water quality based on a network of sites covering 253 water bodies (rivers or sections of rivers), which account for approximately 10% of all water bodies. The indicator is based on a consistent set of five water quality parameters which are sensitive to organic pollution, nutrients and toxic s
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
Aquaculture information
Fish farm survey report (October 2018) - supporting data
Fish farm survey report (October 2018) - dataset
IQI workbooks
Setterness
Djuba Wick
Wick of Vatsetter
Vidlin Voe
Holms Geo
Loura Voe
Taing of Railsburgh
Teisti Geo
Bow of Hascosay
Emamectin Benzoate
SEPA Emamectin Benzoate (EmBz) analytical method
SEPA EmBz analytical method validation
SEPA chemistry validation procedure
EmBz validation
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
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
Velocity
Information regarding water bodies designated as protected areas.
Information regarding water bodies designated as protected areas.
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
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
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
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
River Basin Management Planning
An introduction to our river basin planning work.
An introduction to our river basin planning work.
River basin management planning (RBMP) protects and improves Scotland’s water environment for the benefit of people, wildlife and the economy.
Much of the water environment in Scotland is in good condition. However, there are still significant problems affecting water quality, physical condition, water resources, and the migration of wild fish.
The River Basin Management Plans