Darwen - conf Roddlesworth to tidal sewage map and spill data

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

7
Outlet records: 137
Spills in 2025: 628
Recorded hours: 7
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 Darwen - conf Roddlesworth to tidal

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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BLACKBURN WwTW
United Utilities · River Darwen
Current status unknown
2025 annual record:19spills27.8hours

Brownedge Lane CSO
United Utilities · Cockshott Bk Trb River Darwen
Current status unknown
2025 annual record:2spills6.7hours
Cann Bridge Street CSO
United Utilities · River Darwen
Current status unknown
2025 annual record:16spills9.7hours
Duddle Lane CSO
United Utilities · Hennel Brook
Current status unknown
2025 annual record:8spills50.9hours
Field East of River Darwin CSO
United Utilities · River Darwin
Current status unknown
2025 annual record:56spills473.8hours
Revidge Road/Preston New Road
United Utilities · Tributary Arley Brook
Current status unknown
2025 annual record:0spills0hours
Yew Tree Drive CSO
United Utilities · Tributary of Arley Brook
Current status unknown
2025 annual record:36spills59.3hours

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
Field East of River Darwin CSO
United Utilities
56spills
2
Yew Tree Drive CSO
United Utilities
36spills
3
BLACKBURN WwTW
United Utilities
19spills
4
Cann Bridge Street CSO
United Utilities
16spills
5
Duddle Lane CSO
United Utilities
8spills

Spills over time

The median outlet on Darwen - conf Roddlesworth to tidal recorded 16 spills in 2025, against 11 across England.

6 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 1 recorded more spills, 4 fewer and 1 the same. Together they went from 194 to 137 spills, a fall of 29%.

Largest rises from 2024 to 2025

Yew Tree Drive CSO34 → 36

Year	Outlets with a count	Total spills	Median per outlet	England median
2025	7	137	16	11
2024	7	194	19	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 Darwen - conf Roddlesworth to tidal

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

BLACKBURN WwTWRiver Darwen · 19 spills in 2025
Brownedge Lane CSOCockshott Bk Trb River Darwen · 2 spills in 2025
Cann Bridge Street CSORiver Darwen · 16 spills in 2025
Duddle Lane CSOHennel Brook · 8 spills in 2025
Field East of River Darwin CSORiver Darwin · 56 spills in 2025
Revidge Road/Preston New RoadTributary Arley Brook · 0 spills in 2025
Yew Tree Drive CSOTributary of Arley Brook · 36 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: GB112071065300. The official waterbody record is a source lookup; its classification is not imported here.

All sources How the data works Report pollution

Questions about Darwen - conf Roddlesworth to tidal

Which outlets are linked to Darwen - conf Roddlesworth to tidal?: The source links 7 outlet records to waterbody GB112071065300. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Darwen - conf Roddlesworth to tidal?: 7 records report 137 spills in 2025 and 628 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 Darwen - conf Roddlesworth to tidal?: United Utilities operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Darwen - conf Roddlesworth to tidal 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 Darwen - conf Roddlesworth to tidal?: Every record with a monitor operation figure shows 90% or more for 2025.
Does this show if Darwen - conf Roddlesworth to tidal is safe?: No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.