Chester Marlston-Cum-Lache

Storm overflow operated by Dŵr Cymru Welsh Water. The source names Balderton Brook as the receiving water.

0
Spills in 2025: 0
Recorded hours: 99.9%
Monitor operation: 5
Years listed

The reported spill count was 1 lower than in 2024. This compares event counts, not discharge volume.

Current status unknown

We do not have a live report for this outlet. Its annual spill records are shown below.

How it compares in 2025

Chester Marlston-Cum-Lache recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count.

Group	Rank by spills	Median spills	Median hours
This outlet	–	0	0
England	12,009th of 14,239	11	22.3
Dŵr Cymru Welsh Water	114th of 122	14.5	29.3

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 2021 to 2025, the reported count went from 12 to 0 spills. The highest count was 12 in 2021 and the lowest was 0 in 2022. The monitor worked for less than 90% of 2022, 2023, 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	0	0 hours	99.9%	Official data
2024	1	0.3 hours	99.9%	Official data
2023	2	1.3 hours	54.4%Low coverage	Official data
2022	0	0 hours	4.9%Low coverage	Official data
2021	12	51.3 hours	100%	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: Dŵr Cymru Welsh Water
Outlet type: Storm discharge at a pumping station
Permit: CM0184801
Activity reference: A1
Grid reference: SJ3861263486
Waterbody ID: GB111067052150Official 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 discharge at pumping station”: storm discharge at a pumping station. The overflow is at a pumping station that moves sewage through the network.

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 3.5 km north-east of the Dodleston reference point in the ONS built-up areas data.

Area and water pages

Balderton drain waterbody →

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 ↗

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Questions about Chester Marlston-Cum-Lache

Who operates Chester Marlston-Cum-Lache?: Dŵr Cymru Welsh Water is the operator named in the annual record. The permit reference is CM0184801.
Where does Chester Marlston-Cum-Lache discharge?: The source names Balderton Brook as the receiving water. This does not show how far a discharge travelled.
How many times did Chester Marlston-Cum-Lache spill in 2025?: The 2025 return records 0 counted spill events and 0 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 99.9% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Chester Marlston-Cum-Lache discharging right now?: This record is not matched to a company live feed, so we cannot show a current report. Only the annual figures are available for this outlet.
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 Chester Marlston-Cum-Lache?: The annual return lists the asset type as “Storm discharge at pumping station”, which means storm discharge at a pumping station. The overflow is at a pumping station that moves sewage through the network.
How does Chester Marlston-Cum-Lache compare with other overflows?: Chester Marlston-Cum-Lache recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count. 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.