Balder Cottage CSO
Storm overflow operated by Northumbrian Water. The source names River Balder as the receiving water.
- 0
- Spills in 2025
- 0
- Recorded hours
- 75.1%
- Monitor operation
- 2
- Years listed
Checking the latest monitor report…
How it compares in 2025
Balder Cottage CSO recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count.
The monitor worked for 75.1% of 2025, so this count may be low and its rank may understate activity.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 0 | 0 |
| England | 12,009th of 14,239 | 11 | 22.3 |
| Northumbrian Water | 1,305th of 1,559 | 11 | 15.6 |
| Balder Catchment (trib of Tees) | 3rd of 3 | 25 | 32.7 |
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 | 0 | 0 hours | 75.1%Low coverage | Official data |
| 2024 | 0 | 0 hours | 92.8% | 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 overflow on the sewer network
- Permit
- 251/0925
- Activity reference
- 1
- Grid reference
- NZ0091720008
- Waterbody ID
- GB103025072240Official 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 0.3 km north-west of the Cotherstone 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
- Cotherstone STWCurrent status unknown
Northumbrian Water · River Balder
- The Hagg CSOCurrent status unknown
Northumbrian Water · Tributary of River Balder
- Windmill Cottage CSO The Mill Te066Current status unknown
Northumbrian Water · Unnamed Tributary of Lance Beck
- Romaldkirk Sewage Disposal WorksCurrent status unknown
Northumbrian Water · River Tees
Questions about Balder Cottage CSO
- Who operates Balder Cottage CSO?
- Northumbrian Water is the operator named in the annual record. The permit reference is 251/0925.
- Where does Balder Cottage CSO discharge?
- The source names River Balder as the receiving water. This does not show how far a discharge travelled.
- How many times did Balder Cottage CSO spill in 2025?
- The 2025 return records 0 counted spill events and 0 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 75.1% of the reporting period. Below 90%, some events can be missed, so the count and hours may understate activity.
- Is Balder Cottage CSO 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 Balder Cottage 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 Balder Cottage CSO compare with other overflows?
- Balder Cottage CSO recorded no spills in 2025. It is one of 2,231 overflows in England with a reported count of zero, out of 14,239 with a count. 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.