Groundsure Hazard Alerts

Based on the Indicative Radon Atlas (1km). Properties will be flagged as "radon affected" if it falls within a 1km square where over 1% of properties are classed as in a radon affected area. 

Based on the Environment Agency river and coastal data and Ambiental surface water and groundwater data. 

Based on a combination of datasets to provide an indication of natural instability risk within the vicinity of a property. The following dataset categories are used; natural ground subsidence (shrink-swell, landslide, collapsible and compressible deposits, running sands and dissolution features), non-coal mining, infilled land, historical underground workings, historic surface ground workings, historical mining features, natural cavities, mining cavities, historical and current landfills.

Based on the official route data from HS2, and will include both the original proposed route and current consultation route for phase 2.

This provides 2 alerts: 

1. London Underground is based on the following data; London Underground, Docklands Light Railway, other subway systems and active railways. 
2. Based on the Crossrail 1 route.

Based on data collected by Glenigan from all UK local Authorities. This is then divided into categories based on the following rules:

Based on the official Coal Mining Reporting Area, as defined by The Coal Authority. 

Based on the Cheshire Brine Compensation District as defined by the Cheshire Brine Subsidence Compensation Board. 

Based on a combination of over 20 datasets, with varying search distances to provide an indication of mining risk within the vicinity of a property. 

The response will include a breakdown of the non-coal mining risk types along with a dynamic list of known details. The mining types are Coal, Evaporite, Hydrocarbon, Metals, Stone and Unspecified. Where they are known we will return the specific mineral detail e.g. lead or clay, however there will be some instances where this information is not known, and an empty array [ ] will be returned. A full list of possible returns are shown below (All possible returns table).

Based on a combination of over 20 datasets, with varying search distances to provide an indication of mining risk within the vicinity of a property. 

Based on a combination of datasets to provide an indication of natural instability risk within the vicinity of a property. The following dataset categories are used; natural ground subsidence (shrink-swell, landslide, collapsible and compressible deposits, running sands and dissolution features - rank 3 (low) or above), non-coal mining hazards, infilled land, historical underground workings, historic surface ground workings, historical mining features, natural cavities, mining cavities, historical and current landfills.

Based on SatSense satellite monitoring data, accurate to the millimetre, and designed to

identify location-specific notable or unusual levels of ground movement observed by

measurements from satellite radar.

Based on the official Coal Mining Reporting Areas, as defined by The Coal Authority 

Based on the Cheshire Brine Compensation District as defined by the Cheshire Brine

Subsidence Compensation Board.

This provides a single end point comprising the individual non-coal, ground stability, satellite monitoring, coal and brine GeoRisk Alerts. Each return will include a single JSON response based on the 5 risks. An example return:

{

  “coal”: true,

  “nonCoal”: true,

  “groundStability”: false,

  “brine”: true,

  “groundMovement”: "unknown"