Long Riston North/STW
Storm overflow operated by Yorkshire Water. The source names Stonley Goat Dyke as the receiving water.
- 26
- Spills in 2025
- 300.5
- Recorded hours
- 100%
- Monitor operation
- 3
- Years listed
The reported spill count was 1 higher than in 2024. This compares event counts, not discharge volume.
Checking the latest monitor report…
How it compares in 2025
Long Riston North/STW recorded 26 spills in 2025. That is more than 70% of the 14,239 overflows in England with a reported figure, and ranks 4,061st nationally. Among Yorkshire Water overflows it ranks 786th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Foredyke Stream Lower to Holderness Dr waterbody it ranks 1st of 4.
| Group | Rank by spills | Median spills | Median hours |
|---|---|---|---|
| This outlet | – | 26 | 300.5 |
| England | 4,061st of 14,239 | 11 | 22.3 |
| Yorkshire Water | 786th of 2,176 | 16 | 37.8 |
| Foredyke Stream Lower to Holderness Dr | 1st of 4 | 13 | 150.9 |
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 | 26 | 300.5 hours | 100% | Official data |
| 2024 | 25 | 243 hours | 100% | Official data |
| 2023 | 26 | 230.8 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
- Yorkshire Water
- Outlet type
- Storm tank at a wastewater treatment works
- Permit
- WRA7249
- Activity reference
- A2
- Grid reference
- TA1193042430
- Waterbody ID
- GB104026066910Official 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 tank at WwTW”: storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment 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 0.8 km north-west of the Long Riston 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
- Leven/STWCurrent status unknown
Yorkshire Water · Leven Town Drain
- Bowlams Dyke/CSOCurrent status unknown
Yorkshire Water · Leven Drain
- Leven West Street/CSOCurrent status unknown
Yorkshire Water · Leven Drain
- Skirlaugh Church Lane/CSOCurrent status unknown
Yorkshire Water · Lambwath Stream
Questions about Long Riston North/STW
- Who operates Long Riston North/STW?
- Yorkshire Water is the operator named in the annual record. The permit reference is WRA7249.
- Where does Long Riston North/STW discharge?
- The source names Stonley Goat Dyke as the receiving water. This does not show how far a discharge travelled.
- How many times did Long Riston North/STW spill in 2025?
- The 2025 return records 26 counted spill events and 300.5 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 100% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
- Is Long Riston North/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 Long Riston North/STW?
- The annual return lists the asset type as “Storm tank at WwTW”, which means storm tank at a wastewater treatment works. The overflow comes from storm storage at a treatment works.
- How does Long Riston North/STW compare with other overflows?
- Long Riston North/STW recorded 26 spills in 2025. That is more than 70% of the 14,239 overflows in England with a reported figure, and ranks 4,061st nationally. Among Yorkshire Water overflows it ranks 786th of 2,176; the median Yorkshire Water overflow recorded 16 spills. On the Foredyke Stream Lower to Holderness Dr waterbody it ranks 1st of 4. 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.