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Swarland Old Sewage Works CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Swarland Old Sewage Works CSO. 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	18	123.58	96.6
2024	33	244	99.83
2023	37	315.5	99.89
2022	18	58.25	99.79
2021	29	207.5	99.87

Published record details

Reference: NWL01336
Location: Coquet from Forest Burn to Tidal Limit
Coordinates: 55.32374, -1.73253
Watercourse: Mere Burn
Sewerage company: Northumbrian Water
Asset type: SO on sewer network
Permit reference: 223/0947
Discharge grid reference: NU1707003330
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Coquet from Forest Burn to Tidal Limit

Location

Swarland Old Sewage Works CSO
55.32374, -1.73253

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

Lanehead Pumping Station1 km Swarland Fence Pumping Station2.5 km Whittle Colliery Village STW3.3 km Main Street CSO3.3 km Felton Recreation Ground CSO3.4 km

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