Sewage Tank Cleaning

Wark Sewage Treatment Works: sewage overflow history (NWL01454)

Review available Environment Agency annual monitoring returns for Wark Sewage 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

2020

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	46	423.6	99.77
2024	48	271.75	99.22
2023	26	32.25	91.5
2022	Not reported	Not reported	0
2021	Not reported	Not reported	0
2020	12	47.66	100

Published record details

Reference: NWL01454
Location: N Tyne from Rede to Gunnerton Burn
Coordinates: 55.08424, -2.21663
Watercourse: River North Tyne
Sewerage company: Northumbrian Water
Asset type: Storm tank at WwTW
Permit reference: 231/1071
Discharge grid reference: NY8626976666
Reporting years: 2025, 2024, 2023, 2022, 2021, 2020
Catchment: N Tyne from Rede to Gunnerton Burn

Location

Wark Sewage Treatment Works
55.08424, -2.21663

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

Gunnerton STW4.5 km Gunnerton STW4.5 km Bellingham STW6.8 km Bellingham STW6.8 km Humshaugh STW8.4 km

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