Calder from River Colne to River Chald sewage map and spill data
41 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.
- 41
- Outlet records
- 998
- Spills in 2025
- 5,245
- Recorded hours
- 40
- Linked to a live feed
10 records show monitor operation below 90%. Annual figures describe the whole of 2025, not today.
Outlets on Calder from River Colne to River Chald
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 10 of 41 outlets
Open full map- Albion Mills/CSOCurrent status unknown
Yorkshire Water · River Calder
2025 annual record:52spills376.3hours - Baptist Lane/CSOCurrent status unknown
Yorkshire Water · Spring Mill Beck
2025 annual record:34spills97.3hours - Brewery Lane/CSOCurrent status unknown
Yorkshire Water · Culverted Tributary of River Calder
2025 annual record:14spills50.5hours - Calder Bank Road/CSOCurrent status unknown
Yorkshire Water · River Calder
2025 annual record:3spills2hours - Charles Street/No 2 CSOCurrent status unknown
Yorkshire Water · Old Mill Stream
2025 annual record:19spills63.8hours - Combs Hill/No 2 CSOCurrent status unknown
Yorkshire Water · Tributary of Calder & Hebble Nav.
2025 annual record:14spills11hours - Denby Dale Road/CSOCurrent status unknown
Yorkshire Water · Tributary of the River Calder
2025 annual record:1spill0.3hours - Dewsbury/STW/3Xdwf OverflowCurrent status unknown
Yorkshire Water · River Calder
2025 annual record:42spills413.5hours - Dewsbury/STW/6Xdwf OverflowCurrent status unknown
Yorkshire Water · River Calder
2025 annual record:19spills109.8hours - Fiddlers Hill/CSOCurrent status unknown
Yorkshire Water · Tributary of River Calder
2025 annual record:0spills0hours
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.
- 1Horbury/STW82spills
Yorkshire Water
- 2Horbury Bridge/No 2 CSO63spills
Yorkshire Water
- 3Healey Road Ossett/CSO58spills
Yorkshire Water
- 4Waterton Road/CSO56spills
Yorkshire Water
- 5Albion Mills/CSO52spills
Yorkshire Water
Spills over time
The median outlet on Calder from River Colne to River Chald recorded 20 spills in 2025, against 11 across England.
30 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 15 recorded more spills, 14 fewer and 1 the same. Together they went from 853 to 848 spills, a fall of 1%.
Largest rises from 2024 to 2025
- Waterton Road/CSO31 → 56
- Whinney Moor Pub Hse/CSO3 → 26
- Thornhill Dewsbury/2 CSO0 → 16
| Year | Outlets with a count | Total spills | Median per outlet | England median |
|---|---|---|---|---|
| 2025 | 41 | 998 | 20 | 11 |
| 2024 | 41 | 1,048 | 20 | 19 |
| 2023 | 39 | 1,209 | 18 | 20 |
| 2022 | 37 | 982 | 23 | 13 |
| 2021 | 31 | 771 | 16 | 19 |
| 2020 | 35 | 754 | 10 | 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 Calder from River Colne to River Chald
41 outlet records in alphabetical order. Each link opens the outlet page with its latest report and annual history.
A1 outlet
- Albion Mills/CSORiver Calder · 52 spills in 2025
B2 outlets
- Baptist Lane/CSOSpring Mill Beck · 34 spills in 2025
- Brewery Lane/CSOCulverted Tributary of River Calder · 14 spills in 2025
C3 outlets
- Calder Bank Road/CSORiver Calder · 3 spills in 2025
- Charles Street/No 2 CSOOld Mill Stream · 19 spills in 2025
- Combs Hill/No 2 CSOTributary of Calder & Hebble Nav. · 14 spills in 2025
D3 outlets
- Denby Dale Road/CSOTributary of the River Calder · 1 spill in 2025
- Dewsbury/STW/3Xdwf OverflowRiver Calder · 42 spills in 2025
- Dewsbury/STW/6Xdwf OverflowRiver Calder · 19 spills in 2025
F3 outlets
- Fiddlers Hill/CSOTributary of River Calder · 0 spills in 2025
- Fir Cottage/CSORiver Calder · 7 spills in 2025
- Forge Lane Dewsbury/CSOCalder · 41 spills in 2025
G1 outlet
- Great Cliff/SPSDennington Beck · 39 spills in 2025
H5 outlets
- Healey Road Ossett/CSORiver Calder · 58 spills in 2025
- Horbury Bridge/No 2 CSORiver Calder · 63 spills in 2025
- Horbury Road M1/CSOLupset Beck · 4 spills in 2025
- Horbury/STWRiver Calder · 82 spills in 2025
- Horbury/STW/6Xdwf OverflowRiver Calder · 47 spills in 2025
L2 outlets
- Lock Street/CSORiver Calder · 1 spill in 2025
- Lupset/CSOLupset Beck · 20 spills in 2025
N2 outlets
- Netherton/CSOPits Beck Culverted · 33 spills in 2025
- Newgate/CSORiver Calder · 1 spill in 2025
O3 outlets
- Ossett Spa/CSORiver Calder · 32 spills in 2025
- Ossett Towngate/No 2 CSOSpring Mill Beck · 11 spills in 2025
- Ossett Wakefield Rd/2 CSOClvrt Tributary Springfield Beck · 7 spills in 2025
P1 outlet
- Pildacre Lane/No 2 CSOPildacre Mill Beck · 28 spills in 2025
R3 outlets
- Railway St Dewsbury/CSORiver Calder · 13 spills in 2025
- Ravens Huddfld Rd/CSORiver Calder · 27 spills in 2025
- Ravensbridge Ind Est/CSORiver Calder · 21 spills in 2025
S6 outlets
- Saville Town/CSORiver Calder · 7 spills in 2025
- Scouthill R D/CSONot matched in EA Consents Database · 11 spills in 2025
- Spenborough/SPSRiver Calder and River Spen · 51 spills in 2025
- Spenborough/SPSRiver Calder and River Spen · 26 spills in 2025
- Swallows Nest/CSOTributary of River Calder · 1 spill in 2025
- Syke Ing/No 2 CSOChickenley Beck · 1 spill in 2025
T4 outlets
- Thornes Road Junct/CSOGill Syke · 4 spills in 2025
- Thornes Wharfe/CSORiver Calder · 30 spills in 2025
- Thornhill Dewsbury/1 CSORiver Calder · 36 spills in 2025
- Thornhill Dewsbury/2 CSORiver Calder · 16 spills in 2025
W2 outlets
- Waterton Road/CSOGill Syke · 56 spills in 2025
- Whinney Moor Pub Hse/CSOTributary of the River Calder · 26 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: GB104027062631. The official waterbody record is a source lookup; its classification is not imported here.
Questions about Calder from River Colne to River Chald
- Which outlets are linked to Calder from River Colne to River Chald?
- The source links 41 outlet records to waterbody GB104027062631. The link comes from the annual return; it does not model where a discharge travelled.
- How many spills were recorded for Calder from River Colne to River Chald?
- 41 records report 998 spills in 2025 and 5,245 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 Calder from River Colne to River Chald?
- 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 Calder from River Colne to River Chald are linked to a live feed?
- 40 of the 41 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 Calder from River Colne to River Chald?
- 10 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 Calder from River Colne to River Chald is safe?
- No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.