Mainsforth Terrace SPS
Storm overflow operated by Northumbrian Water. The source names North Sea as the receiving water.
- 35
- Spills in 2025
- 129.2
- Recorded hours
- 31.1%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Mainsforth Terrace SPS recorded 35 spills in 2025. That is more than 78% of the 14,239 overflows in England with a reported figure, and ranks 2,896th nationally. Among Northumbrian Water overflows it ranks 269th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees Coastal waterbody it ranks 4th of 32.
The monitor worked for 31.1% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 35 | 129.2 |
| England | 2,896th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 269th of 1,559 | 11 | 15.6 |
| Tees Coastal | 4th of 32 | 3 | 2.7 |
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 | 35 | 129.2 hours | 31.1%Low coverage | Official data |
| 2024 | 4 | 4 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
- 255/1095
- Activity reference
- A1
- Grid reference
- NZ5199931956 & NZ5179731901
- Waterbody ID
- GB650301500005Official 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 1.5 km east of the Hartlepool reference point in the ONS built-up areas data.
Designated bathing waters within 3 km in a straight line:
Distance does not show that water from this outlet reaches a bathing water. Check the official bathing-water profile for its classification and advice.
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
- Bridge Street SPSCurrent status unknown
Northumbrian Water · North Sea
- Albion Terrace Storm RetentionCurrent status unknown
Northumbrian Water · North Sea
- Glentower Grove SPSCurrent status unknown
Northumbrian Water · Tributary North Sea (at Carr House)
- South End Cottages CSOCurrent status unknown
Northumbrian Water · Culverted watercourse to North Sea
Questions about Mainsforth Terrace SPS
- Who operates Mainsforth Terrace SPS?
- Northumbrian Water is the operator named in the annual record. The permit reference is 255/1095.
- Where does Mainsforth Terrace SPS discharge?
- The source names North Sea as the receiving water. This does not show how far a discharge travelled.
- How many times did Mainsforth Terrace SPS spill in 2025?
- The 2025 return records 35 counted spill events and 129.2 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 31.1% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Mainsforth Terrace 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 Mainsforth Terrace 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 Mainsforth Terrace SPS compare with other overflows?
- Mainsforth Terrace SPS recorded 35 spills in 2025. That is more than 78% of the 14,239 overflows in England with a reported figure, and ranks 2,896th nationally. Among Northumbrian Water overflows it ranks 269th of 1,559; the median Northumbrian Water overflow recorded 11 spills. On the Tees Coastal waterbody it ranks 4th of 32. 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.