I've submitted my objection and concerns to Southern Water as part of their latest consultation as part of the Hampshire Water Transfer and Water Recycling Project.
More information on the project can be found on Southern Water's website
Local community group Havant Matters has also set up a very useful website; this has lots of information and is a great reference to use.
My five-page objection is here. I am objecting to the proposals over concerns about water quality, biodiversity impacts on Langstone Harbour, harm to The Solent, the inadequate consideration of alternative options and Southern Water's disregard for local people.
