Hollowell STW

Storm overflow operated by Anglian Water. The source names Brampton Branch R.Nene NT as the receiving water.

61
Spills in 2025: 1,190.3
Recorded hours: 100%
Monitor operation: 5
Years listed

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Hollowell STW recorded 61 spills in 2025. That is more than 92% of the 14,239 overflows in England with a reported figure, and ranks 1,061st nationally. Among Anglian Water overflows it ranks 38th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Hollowell Arm of Spratton Brook waterbody it ranks 1st of 5.

Group	Rank by spills	Median spills	Median hours
This outlet	–	61	1,190.3
England	1,061st of 14,239	11	22.3
Anglian Water	38th of 1,438	6	13.5
Hollowell Arm of Spratton Brook	1st of 5	5	13.8

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

From 2021 to 2025, the reported count went from 13 to 61 spills. The highest count was 191 in 2024 and the lowest was 13 in 2021. The monitor worked for less than 90% of 2024, so that count may be low.Amber bars mark years when the monitor worked for less than 90% of the year.

Year	Spills	Duration	Monitor operation	Source
2025	61	1,190.3 hours	100%	Official data
2024	191	3,585.3 hours	83.4%Low coverage	Official data
2023	121	1,297.5 hours	100%	Official data
2022	39	183.3 hours	100%	Official data
2021	13	14.8 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: Anglian Water
Outlet type: Storm tank at a wastewater treatment works
Permit: AW5NF254
Activity reference: A2
Grid reference: SP6947071890
Waterbody ID: GB105032045510Official 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 1.2 km west of the Creaton reference point in the ONS built-up areas data.

Area and water pages

Hollowell Arm of Spratton Brook waterbody →

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

Guilsborough CSO
Anglian Water · Tributary of Spratton Brook
Current status unknown

Creaton Hospital Sm
Anglian Water · Un-named trib River Nene
Current status unknown
Teeton Sp
Anglian Water · River Nene (Brixworth Branch)
Current status unknown
Creaton STW
Anglian Water · Brampton Branch R.Nene NT
Current status unknown

Questions about Hollowell STW

Who operates Hollowell STW?: Anglian Water is the operator named in the annual record. The permit reference is AW5NF254.
Where does Hollowell STW discharge?: The source names Brampton Branch R.Nene NT as the receiving water. This does not show how far a discharge travelled.
How many times did Hollowell STW spill in 2025?: The 2025 return records 61 counted spill events and 1,190.3 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 Hollowell 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 Hollowell 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 Hollowell STW compare with other overflows?: Hollowell STW recorded 61 spills in 2025. That is more than 92% of the 14,239 overflows in England with a reported figure, and ranks 1,061st nationally. Among Anglian Water overflows it ranks 38th of 1,438; the median Anglian Water overflow recorded 6 spills. On the Hollowell Arm of Spratton Brook waterbody it ranks 1st of 5. 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.