Bellozanne Sewage Treatment Works compliance dataBellozanne Sewage Treatment Works compliance data
Produced by the Freedom of Information officeAuthored by Infrastructure and Environment and published on
02 April 2026.Prepared internally, no external costs.
Request 811303906
Provide the compliance data for the Bellozanne Sewage Treatment Works (STW), specifically regarding the discharge of treated sewage effluent into St Aubin’s Bay under permit DC/2000/07/01.
Now that the new STW has been fully operational for over two years (since December 2023), provide the following performance metrics for the period of 1 January 2025 to 1 March 2026:
1. Total Nitrogen (TN) and Ammonia: Please provide the monthly average and maximum recorded values for Total Nitrogen and Ammoniacal Nitrogen in the final effluent.
2. Compliance Returns: Please confirm if any "Exceedance Notifications" or "Breach Reports" were filed by the operator in relation to this permit during the specified period.
3. Storm Overflows: Please provide the total number of hours and the estimated volume of partially treated effluent discharged via the storm outfall during heavy rainfall events.
4. BOD and Suspended Solids: The monthly 95th percentile results for Biochemical Oxygen Demand (BOD) and Suspended Solids.
5. PFAS Monitoring: Any available data regarding the presence of PFOS/PFOA in the final effluent or processed sludge during the last 12 months.
Response
1, 3 and 4
The information request can be found in the attached document
Freedom of Information response 811303906 - Attachment.pdf
2
There have been no “Exceedance Notifications" or "Breach Reports” in the specified time period.
5
Data regarding the presence of PFOS/PFOA in the final effluent or processed sludge during the last 12 months can be found on www.gov.je using the link below, therefore Article 23 of the Freedom of Information (Jersey) Law 2011 applies.
PFAS Testing Results Paper.pdf
PFAS in Jersey
Article applied
Article 23 - Information accessible to applicant by other means
(1) Information is absolutely exempt information if it is reasonably available to the applicant, otherwise than under this Law, whether or not free of charge.
(2) A scheduled public authority that refuses an application for information on this ground must make reasonable efforts to inform the applicant where the applicant may obtain the information.
gov.je