Nunthorpe No 1 SPS
Storm overflow operated by Northumbrian Water. The source names Tributary of Marton West Beck as the receiving water.
- 20
- Spills in 2025
- 215
- Recorded hours
- 99.9%
- Monitor operation
- 5
- Years listed
The reported spill count was 15 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Nunthorpe No 1 SPS recorded 20 spills in 2025. That is more than 63% of the 14,239 overflows in England with a reported figure, and ranks 5,045th nationally. Among Northumbrian Water overflows it ranks 529th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Marton West Beck Catchment (trib of Tidal Tees) waterbody it ranks 1st of 11.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 20 | 215 |
| England | 5,045th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 529th of 1,559 | 11 | 15.6 |
| Marton West Beck Catchment (trib of Tidal Tees) | 1st of 11 | 2 | 1.7 |
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 | 20 | 215 hours | 99.9% | Official data |
| 2024 | 35 | 416 hours | 100% | Official data |
| 2023 | 37 | 385.6 hours | 100% | Official data |
| 2022 | 12 | 84.7 hours | 100% | Official data |
| 2021 | 39 | 540.8 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
- Northumbrian Water
- Outlet type
- Storm discharge at a pumping station
- Permit
- 25/04/1621
- Activity reference
- A1
- Grid reference
- NZ5318413831
- Waterbody ID
- GB103025072210Official 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 4.2 km north-west of the Great Ayton 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
- Grange Mill Combined Sewer OverflowCurrent status unknown
Northumbrian Water · River Leven
- Tanton Road CSOCurrent status unknown
Northumbrian Water · Meadowfield Stell
- Great Ayton Sewage Treatment WorksCurrent status unknown
Northumbrian Water · River Leven
- Abbey Court (Ampleforth Avenue) CSOCurrent status unknown
Northumbrian Water · Cross Beck
Questions about Nunthorpe No 1 SPS
- Who operates Nunthorpe No 1 SPS?
- Northumbrian Water is the operator named in the annual record. The permit reference is 25/04/1621.
- Where does Nunthorpe No 1 SPS discharge?
- The source names Tributary of Marton West Beck as the receiving water. This does not show how far a discharge travelled.
- How many times did Nunthorpe No 1 SPS spill in 2025?
- The 2025 return records 20 counted spill events and 215 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 Nunthorpe No 1 SPS 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 Nunthorpe No 1 SPS?
- 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 Nunthorpe No 1 SPS compare with other overflows?
- Nunthorpe No 1 SPS recorded 20 spills in 2025. That is more than 63% of the 14,239 overflows in England with a reported figure, and ranks 5,045th nationally. Among Northumbrian Water overflows it ranks 529th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Marton West Beck Catchment (trib of Tidal Tees) waterbody it ranks 1st of 11. 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.