Hiz (DS Hitchin) sewage map and spill data

2 storm overflows listed in the 2025 annual return name this water. All are operated by Anglian Water. Check the latest company report for each outlet below.

2
Outlet records: 16
Spills in 2025: 26
Recorded hours: 2
Linked to a live feed

Annual figures describe the whole of 2025, not today.

Official waterbody record ↗How spills are counted Search the national map

Outlets on Hiz (DS Hitchin)

Filter by the latest company report. The map follows the filters.

Filters apply to the map and list. Recent stops need a current report and a recorded stop time. They do not show whether water is safe.

Showing 2 of 2 outlets

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Hitchin STW
Anglian Water · River Hiz
Current status unknown
2025 annual record:3spills0.5hours

Hitchin STW
Anglian Water · River Hiz
Current status unknown
2025 annual record:13spills25.5hours

Most recorded spills in 2025

The highest 2025 counts among these outlets. A count is events, not volume or harm. Equal counts share a rank.

1
Hitchin STW
Anglian Water
13spills
2
Hitchin STW
Anglian Water
3spills

Spills over time

The median outlet on Hiz (DS Hitchin) recorded 8 spills in 2025, against 11 across England.

1 outlet has a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 0 recorded more spills, 1 fewer and 0 the same. Together it went from 21 to 13 spills, a fall of 38%.

Year	Outlets with a count	Total spills	Median per outlet	England median
2025	2	16	8	11
2024	2	65	32.5	19
2023	2	95	47.5	20
2022	2	42	21	13
2021	2	7	3.5	19

Earlier returns list fewer of these outlets, so totals are not comparable between years. The median per outlet and the like-for-like change are fairer comparisons. Counts are events, not volume.

All outlet records on Hiz (DS Hitchin)

2 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.

Hitchin STWRiver Hiz · 3 spills in 2025
Hitchin STWRiver Hiz · 13 spills in 2025

Sources and dates

Outlet locations, waterbody links and spill figures come from the Environment Agency 2025 event duration monitoring annual return. The latest company reports come from each operator’s live feed and carry their own dates. Waterbody ID: GB105033037700. The official waterbody record is a source lookup; its classification is not imported here.

All sources How the data works Report pollution

Questions about Hiz (DS Hitchin)

Which outlets are linked to Hiz (DS Hitchin)?: The source links 2 outlet records to waterbody GB105033037700. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Hiz (DS Hitchin)?: 2 records report 16 spills in 2025 and 26 recorded hours. All listed records have a usable count. Outlets can discharge at the same time, so the hours are not the time the whole water was affected.
Who is responsible for the outlets on Hiz (DS Hitchin)?: Anglian Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Hiz (DS Hitchin) are linked to a live feed?: 2 of the 2 records are matched to a monitor in a company live feed. A link does not mean the monitor is working now. Use the status filters above to see the latest report for each outlet, with its date. The rest show annual figures only.
How complete is the monitoring for Hiz (DS Hitchin)?: Every record with a monitor operation figure shows 90% or more for 2025.
Does this show if Hiz (DS Hitchin) is safe?: No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.