Background
Southern Water supplies water in the Sussex North Water Supply Zone (SNWSZ) from a source at Pulborough. This source is hydrologically linked to internationally protected sites in the Arun Valley.
In September 2021, Natural England issued a Position Statement highlighting concerns that this groundwater source might harm biodiversity in these sites. They advised that anyone applying for planning permission or proposing a project in the SNWSZ must demonstrate water neutrality to meet the Conservation of Habitats and Species Regulations 2017.
Water Neutrality requirements withdrawn
On 31 October 2025, Natural England issued a statement confirming that it has withdrawn its Water Neutrality Position Statement. You can read the statement below.
Natural England, Southern Water and the Environment Agency agreed to reduce the licence cap on water abstraction. This change gives enough certainty that development will not harm the protected habitats in the Arun Valley.
This means that development within the SNWSZ will no longer be required to demonstrate that it is water neutral and local authorities do not need to consider these measures when determining relevant plans or projects. To reflect the latest position on water neutrality, we have updated the local list.