Aislaby Quay SPS
Storm overflow operated by Northumbrian Water. The source names River Tees as the receiving water.
- 4
- Spills in 2025
- 38
- Recorded hours
- 94.1%
- Monitor operation
- 6
- Years listed
The reported spill count was 12 lower than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Aislaby Quay SPS recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among Northumbrian Water overflows it ranks 1,017th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees from Skerne to Tidal Limit waterbody it ranks 29th of 34.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 4 | 38 |
| England | 9,334th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 1,017th of 1,559 | 11 | 15.6 |
| Tees from Skerne to Tidal Limit | 29th of 34 | 14 | 36.3 |
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 | 4 | 38 hours | 94.1% | Official data |
| 2024 | 16 | 137.8 hours | 100% | Official data |
| 2023 | 11 | 100.2 hours | 99.6% | Official data |
| 2022 | 3 | 18.2 hours | 82.3%Low coverage | Official data |
| 2021 | 8 | 59 hours | 99.9% | Official data |
| 2020 | 4 | 18.7 hours | 96.4% | 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
- 254/1928
- Activity reference
- A1
- Grid reference
- NZ4071712229 & NZ4071412228
- Waterbody ID
- GB103025072595Official waterbody record ↗
- Location source
- Official annual grid reference
- Location precision
- About 1 metres
- Location note
- The source cell states 2 grid references. This marker uses the first stated reference.
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 1.6 km west of the Yarm 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
- Old Yarm SPSCurrent status unknown
Northumbrian Water · River Tees
- Worsall Road SPSCurrent status unknown
Northumbrian Water · Skytering Beck (R.TEES Catch)
- West Street SPSCurrent status unknown
Northumbrian Water · River Tees
- Aislaby Road Pumping StationCurrent status unknown
Northumbrian Water · Tees Estuary
Questions about Aislaby Quay SPS
- Who operates Aislaby Quay SPS?
- Northumbrian Water is the operator named in the annual record. The permit reference is 254/1928.
- Where does Aislaby Quay SPS discharge?
- The source names River Tees as the receiving water. This does not show how far a discharge travelled.
- How many times did Aislaby Quay SPS spill in 2025?
- The 2025 return records 4 counted spill events and 38 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 94.1% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Aislaby Quay 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 Aislaby Quay 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 Aislaby Quay SPS compare with other overflows?
- Aislaby Quay SPS recorded 4 spills in 2025. That is more than 30% of the 14,239 overflows in England with a reported figure, and ranks 9,334th nationally. Among Northumbrian Water overflows it ranks 1,017th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees from Skerne to Tidal Limit waterbody it ranks 29th of 34. 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.