Spital/Calow/Muster Brook 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: 236
Spills in 2025: 1,453
Recorded hours: 7
Linked to a live feed

1 records show monitor operation below 90%. Annual figures describe the whole of 2025, not today.

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

Outlets on Spital/Calow/Muster Brook

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

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Calow Oaks Farm/No 2 CSO
Yorkshire Water · Tributary of Calow Brook
Current status unknown
2025 annual record:26spills83hours

Hasland By-Pass/CSO
Yorkshire Water · Spittal Brook
Current status unknown
2025 annual record:51spills180hours
Heathcote Drive/CSO
Yorkshire Water · Spital Brook
Current status unknown
2025 annual record:14spills85hours
Hunloke Road/CSO
Yorkshire Water · Tributary of Muster Brook
Current status unknown
2025 annual record:3spills4hours
Temple Normanton/STW
Yorkshire Water · Muster Brook
Current status unknown
2025 annual record:44spills284.3hours
Valley Crescent/CSO
Yorkshire Water · Spital Brook Culverted
Current status unknown
2025 annual record:30spills32.8hours
Williamthorpe/STW
Yorkshire Water · Williamthorpe Reservoir
Current status unknown
2025 annual record:68spills783.8hours

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
Williamthorpe/STW
Yorkshire Water
68spills
2
Hasland By-Pass/CSO
Yorkshire Water
51spills
3
Temple Normanton/STW
Yorkshire Water
44spills
4
Valley Crescent/CSO
Yorkshire Water
30spills
5
Calow Oaks Farm/No 2 CSO
Yorkshire Water
26spills

Spills over time

The median outlet on Spital/Calow/Muster Brook recorded 30 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. 2 recorded more spills, 3 fewer and 0 the same. Together they went from 259 to 219 spills, a fall of 15%.

Largest rises from 2024 to 2025

Valley Crescent/CSO14 → 30
Hasland By-Pass/CSO37 → 51

Year	Outlets with a count	Total spills	Median per outlet	England median
2025	7	236	30	11
2024	7	292	37	19
2023	7	473	77	20
2022	5	178	22	13
2021	4	113	21	19
2020	4	135	19	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 Spital/Calow/Muster Brook

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

Calow Oaks Farm/No 2 CSOTributary of Calow Brook · 26 spills in 2025
Hasland By-Pass/CSOSpittal Brook · 51 spills in 2025
Heathcote Drive/CSOSpital Brook · 14 spills in 2025
Hunloke Road/CSOTributary of Muster Brook · 3 spills in 2025
Temple Normanton/STWMuster Brook · 44 spills in 2025
Valley Crescent/CSOSpital Brook Culverted · 30 spills in 2025
Williamthorpe/STWWilliamthorpe Reservoir · 68 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: GB104027057640. The official waterbody record is a source lookup; its classification is not imported here.

All sources How the data works Report pollution

Questions about Spital/Calow/Muster Brook

Which outlets are linked to Spital/Calow/Muster Brook?: The source links 7 outlet records to waterbody GB104027057640. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Spital/Calow/Muster Brook?: 7 records report 236 spills in 2025 and 1,453 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 Spital/Calow/Muster Brook?: 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 Spital/Calow/Muster Brook are linked to a live feed?: 7 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 Spital/Calow/Muster Brook?: 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 Spital/Calow/Muster Brook is safe?: No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.