Although Chichester Harbour is not a designated bathing water, we monitor water quality regularly and compare the results with standards from the Bathing Water Directive. You can view historical results on the Chichester District Council website, the most recent water quailty results are shown below.

Discharges affecting water quality in the Harbour

There are three Waste Water Treatment Works (WWTW) that discharge treated effluent into the Harbour - at Apuldram, Bosham and Thornham. The works were upgraded in April 2008 so all sewage now receives Ultra Violet and bacteriological treatment, and some of the nutrients are removed before the effluent is discharged. However, when there are heavy storm water or high groundwater conditions, the WWTW may not be able to cope with the volume of water entering the system. In these conditions, diluted sewage which has only received primary treatment (removal of unsightly solids) may be discharged into the Harbour.

Storm discharges at Apuldram are treated by Ultra Violet light so the impact of a storm discharge is reduced. However, good hygiene is advised, such as hand washing and covering open wounds. 

Telemetry at the WWTWs records actual storm water discharges and email notification of these can be received directly from Southern Water, visit for further information.

Chichester Harbour Conservancy carries out regular water sampling at eleven key sites across the harbour and water quality monitoring has shown that all parts of the Harbour are consistently meeting the standards of the European Bathing Water Directive. If a water sample should fail to meet the standards, the relevant harbour sailing clubs are informed.

Further information and water quality testing results are available on the Chichester District Council Website.

Latest Water Quality Results