This download service provides spatial data relating to: - SEPA Licensed Sites

This dataset contains concentrations of dissolved organic carbon, dissolved inorganic carbon, nutrients and concentrations of greenhouse gases CO2, CH4 and N2O from nine sites across the River Tay catchment. Water was sampled on a monthly basis between February 2009 and December 2010. The locations of sampling sites were based on existing flow gauging and water sampling sites of the Scottish Environment Protection Agency (SEPA).

A simple, nationally standardised monitoring technique where volunteers undertake a monthly kick sample of the river bed at a fixed location, and count the abundance of eight key groups of freshwater invertebrates providing an overall score. This score is assessed against a ‘trigger level’ which can indicate severe changes in river water quality, and local RMI groups report trigger level breaches directly to their local ecological contact at the Environment Agency (EA)/Scottish Environment Protection Agency (SEPA)/National Resources Wales (NRW)/Northern Ireland Environment Agency (NIEA). Used alongside routine monitoring by the EA/SEPA/NRW/NIEA, this RMI scheme ensures that water quality is checked more widely, and remedial action is taken at the earliest opportunity if any severe perturbations are detected. This active monitoring also acts as a deterrent to incidental polluters. Successful schemes are underway in catchments across the UK, with data stored on our database, Cartographer. Verified data is freely available to view and download under the terms of the Open Government Licence.