Runwell-Brock Hill Overflow

Storm overflow operated by Anglian Water. The source names tributary River Crouch as the receiving water.

23
Spills in 2025: 41
Recorded hours: 96.7%
Monitor operation: 5
Years listed

The reported spill count was 23 higher than in 2024. This compares event counts, not discharge volume.

Current status unknown

Checking the latest monitor report…

How it compares in 2025

Runwell-Brock Hill Overflow recorded 23 spills in 2025. That is more than 67% of the 14,239 overflows in England with a reported figure, and ranks 4,513th nationally. Among Anglian Water overflows it ranks 231st of 1,438; the median Anglian Water overflow recorded 6 spills. On the Crouch (d/s Wickford) waterbody it ranks 1st of 4.

Group	Rank by spills	Median spills	Median hours
This outlet	–	23	41
England	4,513th of 14,239	11	22.3
Anglian Water	231st of 1,438	6	13.5
Crouch (d/s Wickford)	1st of 4	3	7.1

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 0 to 23 spills. The highest count was 35 in 2022 and the lowest was 0 in 2021. The monitor worked for less than 90% of 2022, 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	23	41 hours	96.7%	Official data
2024	0	0 hours	100%	Official data
2023	32	159 hours	100%	Official data
2022	35	201.5 hours	62.1%Low coverage	Official data
2021	0	0 hours	91.8%	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: Anglian Water
Outlet type: Storm overflow on the sewer network
Permit: ASENF12108
Activity reference: A1
Grid reference: TQ7459094770
Waterbody ID: GB105037028550Official 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 south-west of the Runwell reference point in the ONS built-up areas data.

Area and water pages

Crouch (d/s Wickford) 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

Runwell - Downham Road Combined Sewer Overflow
Anglian Water · tributary River Crouch
Current status unknown

Runwell-Church End La Overflow
Anglian Water · tributary River Crouch
Current status unknown
Wickford Elizabeth Drive Mh9603 Fdt
Anglian Water · River Crouch
Current status unknown
Runwell-Tps
Anglian Water · Trib River Crouch
Current status unknown

Questions about Runwell-Brock Hill Overflow

Who operates Runwell-Brock Hill Overflow?: Anglian Water is the operator named in the annual record. The permit reference is ASENF12108.
Where does Runwell-Brock Hill Overflow discharge?: The source names tributary River Crouch as the receiving water. This does not show how far a discharge travelled.
How many times did Runwell-Brock Hill Overflow spill in 2025?: The 2025 return records 23 counted spill events and 41 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 96.7% of the reporting period, so the annual figures cover most of the year. They still do not measure discharge volume.
Is Runwell-Brock Hill Overflow 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 Runwell-Brock Hill Overflow?: 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 Runwell-Brock Hill Overflow compare with other overflows?: Runwell-Brock Hill Overflow recorded 23 spills in 2025. That is more than 67% of the 14,239 overflows in England with a reported figure, and ranks 4,513th nationally. Among Anglian Water overflows it ranks 231st of 1,438; the median Anglian Water overflow recorded 6 spills. On the Crouch (d/s Wickford) 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.