Mill Ln CSO Uplyme

Storm overflow operated by South West Water. The source names River Lim (S) as the receiving water.

10
Spills in 2025: 36.1
Recorded hours: 8.3%
Monitor operation: 5
Years listed

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Mill Ln CSO Uplyme recorded 10 spills in 2025. That is more than 47% of the 14,239 overflows in England with a reported figure, and ranks 7,195th nationally. Among South West Water overflows it ranks 860th of 1,357; the median South West Water overflow recorded 21 spills. On the Lim waterbody it ranks 3rd of 6.

The monitor worked for 8.3% of 2025, so this count may be low and its rank may understate activity.

Group	Rank by spills	Median spills	Median hours
This outlet	–	10	36.1
England	7,195th of 14,239	11	22.3
South West Water	860th of 1,357	21	39.4
Lim	3rd of 6	9	27.4

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 0 to 10 spills. The highest count was 29 in 2023 and the lowest was 0 in 2021. The monitor worked for less than 90% of 2025, so that count 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	10	36.1 hours	8.3%Low coverage	Official data
2024	2	1.4 hours	100%	Official data
2023	29	652.7 hours	100%	Official data
2022	0	0 hours	100%	Official data
2021	0	0 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: South West Water
Outlet type: Storm overflow on the sewer network
Permit: 201817
Activity reference: A1
Grid reference: SY33129331
Waterbody ID: GB108044009760Official waterbody record ↗
Location source: Official annual grid reference
Location precision: About 10 metres
Location note: Unknown

About the name and type

The annual return lists this asset as “SO on sewer network”: storm overflow on the sewer network. The return places this overflow on the sewer 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 0.5 km east of the Uplyme reference point in the ONS built-up areas data.

Designated bathing waters within 3 km in a straight line:

Distance does not show that water from this outlet reaches a bathing water. Check the official bathing-water profile for its classification and advice.

Area and water pages

Lim 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 ↗

Other outlet records nearby

Uplyme STW SSO Uplyme
South West Water · Tributary of the River Lim
Current status unknown

Horn Bridge Spst Pscsoeo Lyme Regis
South West Water · River Lim
Current status unknown
Jericho CSO Lyme Regis
South West Water · River Lim
Current status unknown
Goslings Bridge CSO Lyme Regis
South West Water · River Lim(S)
Current status unknown

Questions about Mill Ln CSO Uplyme

Who operates Mill Ln CSO Uplyme?: South West Water is the operator named in the annual record. The permit reference is 201817.
Where does Mill Ln CSO Uplyme discharge?: The source names River Lim (S) as the receiving water. This does not show how far a discharge travelled.
How many times did Mill Ln CSO Uplyme spill in 2025?: The 2025 return records 10 counted spill events and 36.1 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 8.3% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
Is Mill Ln CSO Uplyme 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 10 metres. It shows the recorded outlet position, not the extent of any discharge.
What kind of outlet is Mill Ln CSO Uplyme?: The annual return lists the asset type as “SO on sewer network”, which means storm overflow on the sewer network. The return places this overflow on the sewer network.
How does Mill Ln CSO Uplyme compare with other overflows?: Mill Ln CSO Uplyme recorded 10 spills in 2025. That is more than 47% of the 14,239 overflows in England with a reported figure, and ranks 7,195th nationally. Among South West Water overflows it ranks 860th of 1,357; the median South West Water overflow recorded 21 spills. On the Lim waterbody it ranks 3rd of 6. 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.