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South Terrace CSO (G003): sewage overflow history

Review available Environment Agency annual monitoring returns for South Terrace CSO (G003). 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

2021

2022

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	1	0.07	99.72
2024	6	4.5	98.65
2023	11	16	99.98
2022	2	1.75	99.99
2021	4	4.5	99.99

Published record details

Reference: NWL01243
Location: Derwent from Burnhope Burn to River Tyne
Coordinates: 54.91323, -1.81294
Watercourse: Tongue Burn
Sewerage company: Northumbrian Water
Asset type: SO on sewer network
Permit reference: 234/1147
Discharge grid reference: NZ1209057630
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Derwent from Burnhope Burn to River Tyne

Location

South Terrace CSO (G003)
54.91323, -1.81294

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

Pennine View CSO0.5 km Chopwell Park Footpath CSO0.5 km Blackhall Mill Pumping Station0.7 km Tay Street CSO0.8 km Chopwell Road CSO0.8 km

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