Carlisle Street East/CSO
Storm overflow operated by Yorkshire Water. The source names Duke of Norfolk'S Culvert as the receiving water.
- 9
- Spills in 2025
- 3.5
- Recorded hours
- 100%
- Monitor operation
- 6
- Years listed
The reported spill count was 3 higher than in 2024. This compares event counts, not discharge volume.
We do not have a live report for this outlet. Its annual spill records are shown below.
How it compares in 2025
Carlisle Street East/CSO recorded 9 spills in 2025. That is more than 45% of the 14,239 overflows in England with a reported figure, and ranks 7,492nd nationally. Among Yorkshire Water overflows it ranks 1,317th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Car Brook from Source to River Don waterbody it ranks 7th of 18.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 9 | 3.5 |
| England | 7,492nd of 14,239 | 11 | 22.3 |
| Yorkshire Water | 1,317th of 2,176 | 16 | 37.8 |
| Car Brook from Source to River Don | 7th of 18 | 8 | 3.3 |
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
| Year | Spills | Duration | Monitor operation | Source |
|---|---|---|---|---|
| 2025 | 9 | 3.5 hours | 100% | Official data |
| 2024 | 6 | 1.8 hours | 99.4% | Official data |
| 2023 | 6 | 3 hours | 89%Low coverage | Official data |
| 2022 | 5 | 1.5 hours | 99.9% | Official data |
| 2021 | 11 | 12.8 hours | 55.7%Low coverage | Official data |
| 2020 | 1 | 0.3 hours | 96.1% | 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 overflow on the sewer network
- Permit
- E4
- Activity reference
- 2
- Grid reference
- SK3743789533
- Waterbody ID
- GB104027057360Official 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 3.4 km north-east of the Sheffield reference point in the ONS built-up areas data.
Area and water pages
- Waverley and Catcliffe area →
- Greasbrough area →
- Brinsworth area →
- Rotherham area →
- Sheffield area →
- Thorpe Hesley area →
- Ecclesfield and Grenoside area →
- Treeton area →
- Wentworth (Rotherham) area →
- Rawmarsh area →
- Whiston area →
- Highlane area →
- Ridgeway area →
- Chapeltown and High Green area →
- Car Brook from Source to River Don 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
- Carlisle Street 129/CSOCurrent status unknown
Yorkshire Water · Duke of Norfolk'S Culvert
- Owler Lane/CSOCurrent status unknown
Yorkshire Water · Bagley Dyke
- Dunmow Road/CSOCurrent status unknown
Yorkshire Water · Bagley Dyke
- Meadowhall Way/No 2 CSOCurrent status unknown
Yorkshire Water · River Don
Questions about Carlisle Street East/CSO
- Who operates Carlisle Street East/CSO?
- Yorkshire Water is the operator named in the annual record. The permit reference is E4.
- Where does Carlisle Street East/CSO discharge?
- The source names Duke of Norfolk'S Culvert as the receiving water. This does not show how far a discharge travelled.
- How many times did Carlisle Street East/CSO spill in 2025?
- The 2025 return records 9 counted spill events and 3.5 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 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Carlisle Street East/CSO 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 Carlisle Street East/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 Carlisle Street East/CSO compare with other overflows?
- Carlisle Street East/CSO recorded 9 spills in 2025. That is more than 45% of the 14,239 overflows in England with a reported figure, and ranks 7,492nd nationally. Among Yorkshire Water overflows it ranks 1,317th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Car Brook from Source to River Don waterbody it ranks 7th of 18. 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.