Ovington STW
Storm overflow operated by Northumbrian Water. The source names Tees as the receiving water.
- 21
- Spills in 2025
- 21.4
- Recorded hours
- 71.8%
- Monitor operation
- 5
- Years listed
Checking the latest monitor report…
How it compares in 2025
Ovington STW recorded 21 spills in 2025. That is more than 64% of the 14,239 overflows in England with a reported figure, and ranks 4,856th nationally. Among Northumbrian Water overflows it ranks 509th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees from River Greta to River Skerne waterbody it ranks 5th of 12.
The monitor worked for 71.8% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 21 | 21.4 |
| England | 4,856th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 509th of 1,559 | 11 | 15.6 |
| Tees from River Greta to River Skerne | 5th of 12 | 15.5 | 32.8 |
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 | 21 | 21.4 hours | 71.8%Low coverage | Official data |
| 2024 | 8 | 6 hours | 100% | Official data |
| 2023 | 4 | 0.5 hours | 43.2%Low coverage | Official data |
| 2022 | 0 | 0 hours | 100% | Official data |
| 2021 | 5 | 0.1 hours | 99.3% | 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
- Inlet storm overflow at a wastewater treatment works
- Permit
- 252/0366
- Activity reference
- A2
- Grid reference
- NZ1330315050
- Waterbody ID
- GB103025072190Official 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 “Inlet SO at WwTW”: inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
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 4.3 km south-west of the Gainford 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
- Winston STWCurrent status unknown
Northumbrian Water · River Tees
- Newholme C.S.O.Current status unknown
Northumbrian Water · Unnamed Tributary of Tees
- Gainford Sewage Treatment WorksCurrent status unknown
Northumbrian Water · River Tees
- Gainford Sewage Treatment WorksCurrent status unknown
Northumbrian Water · River Tees
Questions about Ovington STW
- Who operates Ovington STW?
- Northumbrian Water is the operator named in the annual record. The permit reference is 252/0366.
- Where does Ovington STW discharge?
- The source names Tees as the receiving water. This does not show how far a discharge travelled.
- How many times did Ovington STW spill in 2025?
- The 2025 return records 21 counted spill events and 21.4 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 71.8% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Ovington STW 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 Ovington STW?
- The annual return lists the asset type as “Inlet SO at WwTW”, which means inlet storm overflow at a wastewater treatment works. The overflow is at the inlet of a treatment works, where wastewater enters the works.
- How does Ovington STW compare with other overflows?
- Ovington STW recorded 21 spills in 2025. That is more than 64% of the 14,239 overflows in England with a reported figure, and ranks 4,856th nationally. Among Northumbrian Water overflows it ranks 509th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees from River Greta to River Skerne waterbody it ranks 5th of 12. 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.