I was pleased to note that in John Foley’s letter (The Argus, June 24) he recognises the importance of the downland to the north of Patcham.

Given that 80% of the city’s drinkable water supply comes from the aquifer forming the Brighton Block, of which Patcham is an integral part, it is clearly a primary component of the city’s wellbeing.

The area of focus is known to be highly karstic in character, has been researched both on a local and international basis and was seen in the past to be so vulnerable and so important as to warrant protection by an Act of Parliament.

This led to a zone of protection two miles in radius centred on Patcham pumping station.

It seems hardly fair, therefore, to consider the comparison of possible schemes against the known facts as dismissing such schemes out of hand.

Groundwater is easy to contaminate but very difficult, if not impossible, to remediate.

We, as a generation, have been extremely fortunate that our forefathers protected these areas for us. We should do the same for future generations.

At a time when there seems to be so much indifference shown to this vital and basic need, we should strive to ensure the path we choose does not lead to higher prices or, ultimately, water poverty.

Dr James Rhodes, Larkfield Way, Brighton