Hertford from Source to River Derwent sewage map and spill data
7 storm overflows listed in the 2025 annual return name this water. All are operated by Yorkshire Water. Check the latest company report for each outlet below.
- 7
- Outlet records
- 159
- Spills in 2025
- 634
- Recorded hours
- 6
- Linked to a live feed
1 records show monitor operation below 90%. Annual figures describe the whole of 2025, not today.
Outlets on Hertford from Source to River Derwent
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 7 of 7 outlets
Open full map- Folkton Carr Ln/CSOCurrent status unknown
Yorkshire Water · Ditch
2025 annual record:22spills40.3hours - Gristhorpe Tank/CSOCurrent status unknown
Yorkshire Water · Tributary of River Hertford
2025 annual record:6spills34.8hours - Hunmanby Stonegate/CSOCurrent status unknown
Yorkshire Water · Tributary Main Drain River Hertford
2025 annual record:65spills193.5hours - Hunmanby/STWCurrent status unknown
Yorkshire Water · Tributary of River Hertford
2025 annual record:23spills155.3hours - Muston/CSOCurrent status unknown
Yorkshire Water · Unnamed Tributary of Hertford
2025 annual record:25spills188hours - Outgaits Lane/CSOCurrent status unknown
Yorkshire Water · Unnamed Tributary of River Hertford
2025 annual record:0spills0hours - Staxton Village/CSOCurrent status unknown
Yorkshire Water · Ditch
2025 annual record:18spills21.8hours
No outlets match these filters.
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.
- 1Hunmanby Stonegate/CSO65spills
Yorkshire Water
- 2Muston/CSO25spills
Yorkshire Water · monitor coverage 83%, below 90%
- 3Hunmanby/STW23spills
Yorkshire Water
- 4Folkton Carr Ln/CSO22spills
Yorkshire Water
- 5Staxton Village/CSO18spills
Yorkshire Water
Spills over time
The median outlet on Hertford from Source to River Derwent recorded 22 spills in 2025, against 11 across England.
5 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 0 recorded more spills, 4 fewer and 1 the same. Together they went from 146 to 128 spills, a fall of 12%.
| Year | Outlets with a count | Total spills | Median per outlet | England median |
|---|---|---|---|---|
| 2025 | 7 | 159 | 22 | 11 |
| 2024 | 7 | 183 | 25 | 19 |
| 2023 | 7 | 208 | 23 | 20 |
| 2022 | 6 | 104 | 11.5 | 13 |
| 2021 | 5 | 98 | 24 | 19 |
| 2020 | 4 | 100 | 14 | 18 |
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 Hertford from Source to River Derwent
7 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.
- Folkton Carr Ln/CSODitch · 22 spills in 2025
- Gristhorpe Tank/CSOTributary of River Hertford · 6 spills in 2025
- Hunmanby Stonegate/CSOTributary Main Drain River Hertford · 65 spills in 2025
- Hunmanby/STWTributary of River Hertford · 23 spills in 2025
- Muston/CSOUnnamed Tributary of Hertford · 25 spills in 2025
- Outgaits Lane/CSOUnnamed Tributary of River Hertford · 0 spills in 2025
- Staxton Village/CSODitch · 18 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: GB104027067811. The official waterbody record is a source lookup; its classification is not imported here.
Questions about Hertford from Source to River Derwent
- Which outlets are linked to Hertford from Source to River Derwent?
- The source links 7 outlet records to waterbody GB104027067811. The link comes from the annual return; it does not model where a discharge travelled.
- How many spills were recorded for Hertford from Source to River Derwent?
- 7 records report 159 spills in 2025 and 634 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 Hertford from Source to River Derwent?
- Yorkshire Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
- Which outlets on Hertford from Source to River Derwent are linked to a live feed?
- 6 of the 7 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 Hertford from Source to River Derwent?
- 1 of the listed records have monitor operation below 90% for 2025. Events can be missed when a monitor is not working, so low counts from those outlets may understate activity.
- Does this show if Hertford from Source to River Derwent is safe?
- No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.