Sewage Tank Cleaning

High Royd Sewage Treatment Works: sewage overflow history (YWS00815)

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

← All records

Annual monitoring returns

2020

2021

2022

131

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	57	548.17	99.99
2024	91	1,051.67	99.99
2023	131	2,707.82	99.99
2022	99	1,655.37	99.74
2021	90	876.17	99.98
2020	1	3.56	99.71

Published record details

Reference: YWS00815
Location: Calder from Colden Water to Ryburn Confluence
Coordinates: 53.71124, -1.93039
Watercourse: River Calder
Sewerage company: Yorkshire Water
Asset type: Storm tank at WwTW
Permit reference: 967
Discharge grid reference: SE0469223871
Reporting years: 2025, 2024, 2023, 2022, 2021, 2020
Catchment: Calder from Colden Water to Ryburn Confluence

Location

High Royd Sewage Treatment Works
53.71124, -1.93039

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

High Royd Sewage Treatment Works0 km High Royd Sewage Treatment Works0.1 km Hollins Lane CSO0.6 km Longbottom Bridge CSO0.7 km Pear Tree Hollins CSO0.8 km

Sewage Tank Cleaning

Need help with sewage at a property or site?

Describe the affected area and the type of assistance you are seeking, such as sewage removal, tank cleaning or pump station cleaning. Include any information already available about the source of the problem.

Discuss sewage removal