Drainage Services in Alton

Alton stands at the head of the northern River Wey on chalk, and the stream through the town behaves as a winterbourne — it flows strongly when the chalk aquifer is charged after wet winters and can fall away in dry periods. That same aquifer rise pushes groundwater into any drain with open joints, so infiltration through the wetter months is a recognised local pattern rather than an occasional event.

The Georgian and Victorian town centre runs on shallow clay pipework, some of it combined, beneath narrow streets and listed frontages, with mature trees in the older residential roads causing root ingress into displaced joints. On the higher chalk at Four Marks and Medstead the ground drains freely and post-war pipework performs well, though clay-with-flints deposits in places hold water and slow soakaways. Villages such as Chawton and Bentley include a good number of properties on septic tanks and package treatment plants under the General Binding Rules.

For Alton we CCTV survey first to grade pipe condition and check specifically for groundwater infiltration, which is a genuine factor in this chalk valley head. High-pressure jetting clears root and silt blockages in the older clay runs, no-dig lining allows repairs in the historic centre without excavation, and rural drainage fields are designed from measured percolation given how variable the chalk and clay cover is here.