Grant scheme launched to help Bishop's Sutton residents upgrade septic tanks
Phase one of a new grant scheme, designed to protect the Solent and its rivers, has been launched in Winchester. Homeowners in Bishop Sutton that live along the Itchen River, and meet the criteria, can apply for up to £30,000 to replace outdated septic tanks with a modern Package Treatment Plant.
The Solent Householder Septic Tank Upgrade Grant is being delivered by the Solent Mitigation Partnership (SMP) with support from Winchester City Council. The scheme covers surveys, installation, and the first year’s servicing; homeowners will not be required to repay any grants awarded.
Winchester is the first district to benefit from the rollout. Phase 1 focuses on homes near the River Arle, a tributary of the River Itchen, where upgrades will deliver the greatest environmental benefit by reducing nutrient pollution entering local watercourses and the internationally protected River Itchen.
Older septic tanks can release nutrient‑rich wastewater into rivers and streams, damaging water quality and wildlife habitats. Replacing them with modern treatment systems helps protect local rivers and the wider Solent catchment.
Cllr Kelsie Learney, Cabinet Member for Climate and Nature Emergency: “Private septic tanks are a significant source of the pollution impacting our local rivers and chalk streams but are expensive to modernise. Tackling the financial barriers many of our residents face will help us improve water quality that much faster.”
Councillor Keith House, Chair of the Partnership for South Hampshire, said: “By working together across councils, we’re delivering practical, fully funded solutions that protect sensitive river environments while supporting residents.”
To be eligible, homes should fall within the correct water catchment area, have a septic tank that is over 10 years old. Priority for the grant will be given to Council Tax band A-D. Full details are available at: https://solentmitigationpartnership.co.uk/solent-householder-septic-tank-upgrade-grant-information.
The first phase will fund around 30 upgrades, backed by a £1 million investment. Places are limited and eligible residents are encouraged to apply early.
Phase two, to be launched later this year, will be for properties based in the New Forest.