St Michaels Road/Manor Road CSO
Storm overflow operated by United Utilities. The source names River Alt (tidal) as the receiving water.
- 80
- Spills in 2025
- 412.5
- Recorded hours
- 79.8%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
St Michaels Road/Manor Road CSO recorded 80 spills in 2025. That is more than 96% of the 14,239 overflows in England with a reported figure, and ranks 512th nationally. Among United Utilities overflows it ranks 156th of 2,270; the median United Utilities overflow recorded 15 spills. On the MERSEY MOUTH - transitional waterbody it ranks 1st of 23.
The monitor worked for 79.8% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 80 | 412.5 |
| England | 512th of 14,239 | 11 | 22.3 |
| United Utilities | 156th of 2,270 | 15 | 29.1 |
| MERSEY MOUTH - transitional | 1st of 23 | 22 | 45.4 |
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
| Year | Spills | Duration | Monitor operation | Source |
|---|---|---|---|---|
| 2025 | 80 | 412.5 hours | 79.8%Low coverage | Official data |
| 2024 | 120 | 649.6 hours | 99% | 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
- United Utilities
- Outlet type
- Storm overflow on the sewer network
- Permit
- 01SEF0013
- Activity reference
- A1
- Grid reference
- SD2955001655
- Waterbody ID
- GB641211630001Official 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 “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 2 km south of the Hightown (Sefton) 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
- St Andrew's Road/St Michael's Road CSOCurrent status unknown
United Utilities · Mersey Estuary
- Dibbs Lane CSOCurrent status unknown
United Utilities · Mersey Estuary
- O/S 32 Hall Road East CSOCurrent status unknown
United Utilities · River Mersey Estuary
- Outside 49 St Andrews Road CSOCurrent status unknown
United Utilities · Mersey Estuary
Questions about St Michaels Road/Manor Road CSO
- Who operates St Michaels Road/Manor Road CSO?
- United Utilities is the operator named in the annual record. The permit reference is 01SEF0013.
- Where does St Michaels Road/Manor Road CSO discharge?
- The source names River Alt (tidal) as the receiving water. This does not show how far a discharge travelled.
- How many times did St Michaels Road/Manor Road CSO spill in 2025?
- The 2025 return records 80 counted spill events and 412.5 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 79.8% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is St Michaels Road/Manor Road CSO 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 St Michaels Road/Manor Road CSO?
- 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 St Michaels Road/Manor Road CSO compare with other overflows?
- St Michaels Road/Manor Road CSO recorded 80 spills in 2025. That is more than 96% of the 14,239 overflows in England with a reported figure, and ranks 512th nationally. Among United Utilities overflows it ranks 156th of 2,270; the median United Utilities overflow recorded 15 spills. On the MERSEY MOUTH - transitional waterbody it ranks 1st of 23. 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.