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Bicester Wastewater Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Bicester Wastewater Treatment Works. Compare reported spill counts, total duration and monitor operation by year, with source details and gaps in the series identified.

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Annual monitoring returns

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	34	450.25	99.99
2024	89	1,171	99.97
2023	66	839.25	99.22

Published record details

Reference: TWL00038
Location: Langford Brook (Bicester to Ray inc Gagle Brook)
Coordinates: 51.88734, -1.15897
Watercourse: Langford Brook
Sewerage company: Thames Water
Asset type: Storm tank at WwTW
Permit reference: CNTD.0023
Discharge grid reference: SP5798021310
Reporting years: 2025, 2024, 2023
Catchment: Langford Brook (Bicester to Ray inc Gagle Brook)

Location

Bicester Wastewater Treatment Works
51.88734, -1.15897

Understanding annual storm overflow figures

The Environment Agency's annual returns report storm overflow monitoring information supplied by water companies. Spill counts use the regulatory 12/24-hour block method, so a counted spill is not necessarily a single uninterrupted discharge. Duration is the reported total time in spill, rather than the volume of sewage discharged. Monitor operation indicates the percentage of the reporting period for which the monitor operated. Missing values, incomplete monitoring and changes in recorded outlet details can affect comparisons between years. These annual figures describe historical reporting periods, not live discharge conditions or the cause of sewage problems at an individual property.

Nearby records

Bucknell Pumping Station4.6 km Middleton Stoney WWTW4.7 km Charlton-On-Otmoor WWTW5.5 km Weston-On-The-Green WWTW5.8 km Weston-on-the-green STW Pumping Sta5.8 km

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