At a small but increasing number of observation boreholes provision is made for the routine transmission - usually by telephone line - of groundwater levels to local, or regional centres.

Where appropriate, data from observation boreholes remote from local influences should be considered. 4.4.2 Groundwater levels should be monitored regularly and compared with abstraction, rainfall and quality data.

If CO2 - driven EOR was undertaken in any area where there was an 'observation borehole' then tracers etc might be used in order to better understand CO2 migration under 'natural' conditions.

The Environment Agency's water situation report for the north west of England (which is published on the Gov.UK website) reports the situation for observation boreholes in the main bedrock aquifer in Cumbria and Lancashire, the Sherwood Sandstone.

The final conclusion from the pilot study was that the overall scheme appeared feasible and a significant number of large abstraction boreholes and observation boreholes, together with pipelines and control equipment, were installed in the Lambourn catchment and also in other nearby river catchments.