Mexboro Swinton/STW

Storm overflow operated by Yorkshire Water. The source names River Don as the receiving water.

106
Spills in 2025: 800.5
Recorded hours: 85.7%
Monitor operation: 4
Years listed

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Mexboro Swinton/STW recorded 106 spills in 2025. That is more than 98% of the 14,239 overflows in England with a reported figure, and ranks 204th nationally. Among Yorkshire Water overflows it ranks 21st of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Don from Greasborough Dyke to River Dearne waterbody it ranks 2nd of 37.

The monitor worked for 85.7% of 2025, so this count may be low and its rank may understate activity.

Group	Rank by spills	Median spills	Median hours
This outlet	–	106	800.5
England	204th of 14,239	11	22.3
Yorkshire Water	21st of 2,176	16	37.8
Don from Greasborough Dyke to River Dearne	2nd of 37	15	72.8

Rank 1 has the most spills. Equal counts share a rank. Only overflows with a reported count are ranked. Counts do not measure volume, so a higher rank does not mean more sewage.

Annual spill history

From 2022 to 2025, the reported count went from 62 to 106 spills. The highest count was 169 in 2023 and the lowest was 62 in 2022. The monitor worked for less than 90% of 2022, 2025, so those counts may be low.Amber bars mark years when the monitor worked for less than 90% of the year.

Year	Spills	Duration	Monitor operation	Source
2025	106	800.5 hours	85.7%Low coverage	Official data
2024	119	1,108.9 hours	92.3%	Official data
2023	169	2,576 hours	97.1%	Official data
2022	62	322.3 hours	81.8%Low coverage	Official data

A missing figure means the source did not provide a usable value. A zero is shown as zero. Monitor operation below 90% can make comparison less reliable.

Outlet details

Water company: Yorkshire Water
Outlet type: Storm tank at a wastewater treatment works
Permit: 2160
Activity reference: A2
Grid reference: SK4694099190
Waterbody ID: GB104027057452Official waterbody record ↗
Location source: Official annual grid reference
Location precision: About 1 metres
Location note: Unknown

About the name and type

The annual return lists this asset as “Storm tank at WwTW”: storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.

The waterbody link opens the Environment Agency record for the exact ID in the return. It is a source lookup; we do not import its classification.

Where it is

The recorded position is about 1.3 km south-west of the Mexborough reference point in the ONS built-up areas data.

Area and water pages

Check the official record

Public access to this outlet is unknown. Do not enter restricted land or use this page as a route guide.

Open official source ↗

Other outlet records nearby

Carlisle Street/CSO
Yorkshire Water · Sheff & South Yorks Nav Canal
Current status unknown

Lime Grove/CSO
Yorkshire Water · Clvrt Tributary of Kilnhurst Cut
Current status unknown
Britain Street/CSO
Yorkshire Water · River Don via Public Sewer
Current status unknown
Swinton Road/CSO
Yorkshire Water · River Don via Pubic Sewer
Current status unknown

Questions about Mexboro Swinton/STW

Who operates Mexboro Swinton/STW?: Yorkshire Water is the operator named in the annual record. The permit reference is 2160.
Where does Mexboro Swinton/STW discharge?: The source names River Don as the receiving water. This does not show how far a discharge travelled.
How many times did Mexboro Swinton/STW spill in 2025?: The 2025 return records 106 counted spill events and 800.5 hours of recorded discharge. Spills are counted with the 12/24-hour method, so this is not a count of every start signal.
Can I trust the 2025 figures for this outlet?: The monitor worked for 85.7% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Mexboro Swinton/STW discharging right now?: This record is linked to a company live feed. The panel above shows the latest report we hold, with its date. That report can be old, and the monitor can be offline, so check the date before relying on it. A report that no discharge is taking place is not a water-quality result.
How accurate is the map marker?: The marker comes from the grid reference in the official annual return, which is accurate to about 1 metres. It shows the recorded outlet position, not the extent of any discharge.
What kind of outlet is Mexboro Swinton/STW?: The annual return lists the asset type as “Storm tank at WwTW”, which means storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
How does Mexboro Swinton/STW compare with other overflows?: Mexboro Swinton/STW recorded 106 spills in 2025. That is more than 98% of the 14,239 overflows in England with a reported figure, and ranks 204th nationally. Among Yorkshire Water overflows it ranks 21st of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Don from Greasborough Dyke to River Dearne waterbody it ranks 2nd of 37. Ranks compare counted spill events only. They do not compare volume or harm.
Does zero spills mean the water was safe?: No. A zero means the annual return recorded zero counted spill events for this outlet and year. It is not a water-quality test, and pollution can come from other sources.