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Mayfield Sewage Treatment Works: sewage overflow history (SVT01520)

Review available Environment Agency annual monitoring returns for Mayfield 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	56	379.25	99.86
2024	7	3.41	100
2023	10	8.94	91.3
2020	0	0	100

Published record details

Reference: SVT01520
Location: Dove - conf R Manifold to conf R Churnet
Coordinates: 52.99648, -1.77754
Watercourse: River Dove
Sewerage company: Severn Trent Water
Asset type: Storm tank at WwTW
Permit reference: T/29/35581/R
Discharge grid reference: SK1502844374
Reporting years: 2025, 2024, 2023, 2020
Catchment: Dove - conf R Manifold to conf R Churnet

Location

Mayfield Sewage Treatment Works
52.99648, -1.77754

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

Mayfield Sewage Treatment Works0 km Hanging Bridge No.1 Sps1.4 km Clifton - Watery Lane/Green Lane (CSO)1.4 km Clifton - Mayfield Road PS (CSO)1.6 km Ashbourne STW2.2 km

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