Regional and local coverage

Geochemical Baseline Survey of the Environment (G-BASE)

The Geochemical Baseline Survey of the Environment (G-BASE) project has collected samples at a density of one sample per 2 km2 from rural environments across parts of Great Britain, and at a density of four sites per 1 km2 within the build-up areas of 25 major cities . Soils were sampled by multiple campaigns between 1985 and 2013 (older samples from previous reconnaissance projects are also available). Each site has a surface sample (5-20 cm) and a profile sample (35-50 cm). A third topsoil sample (0-2 cm) was also collected across Greater London. For each sample, a suite of over 50 elements have been analysed.

See G-BASE rural geochemical mapping for further information on the areas that have been sampled between 1985 and 2014 and how to acquire this data.

High density soil geochemical data are also available for 25 major cities and towns of Great Britain. Soil samples were collected as part of the Geochemical Baseline Survey of the Environment (G-BASE) project at a density of four sites per 1 km2 within the build-up areas. At each sampling site a surface (5-20 cm) and a profile (35-50 cm) sample were collected (and a third topsoil sample from 0-2 cm across Greater London).

The data are held and maintained by the British Geological Survey. Final analyses from summer 2013 sampling will be available from summer 2016.
We are currently preparing all G-BASE soil data for visualisation and release via the UKSO.