Sewage Map

Tees sewage map and spill data

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

40
Outlet records
965
Spills in 2025
5,061
Recorded hours
37
Linked to a live feed

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

Official waterbody record ↗How spills are countedSearch the national map

Outlets on Tees

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 40 outlets

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  • A66 Rider Sewer CSO

    Northumbrian Water · Old River Tees

    Current status unknown
    2025 annual record:4spills2.7hours
  • Abbey Court (Ampleforth Avenue) CSO

    Northumbrian Water · Cross Beck

    Current status unknown
    2025 annual record:8spills15.5hours
  • Acklam Road CSO

    Northumbrian Water · The Old River Tees

    Current status unknown
    2025 annual record:29spills111.7hours
  • Acklam Road CSO

    Northumbrian Water · The Old River Tees

    Current status unknown
    2025 annual record:21spills66.8hours
  • Acklam Road CSO

    Northumbrian Water · The Old River Tees

    Current status unknown
    2025 annual record:16spills17.8hours
  • Acklam Street SPS

    Northumbrian Water · The River Tees

    Current status unknown
    2025 annual record:44spills60.9hours
  • Billingham STW

    Northumbrian Water · North Sea

    Current status unknown
    2025 annual record:71spills339.1hours
  • Billingham STW

    Northumbrian Water · North Sea

    Current status unknown
    2025 annual record:6spills11.7hours
  • Billingham STW

    Northumbrian Water · North Sea

    Current status unknown
    2025 annual record:3spills1.8hours
  • Billingham STW

    Northumbrian Water · North Sea

    Current status unknown
    2025 annual record:25spills126.5hours

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. 1
    Graythorp STW

    Northumbrian Water

    94spills
  2. 2
    Cargo Fleet SPS

    Northumbrian Water

    87spills
  3. 3
    Cargo Fleet SPS

    Northumbrian Water

    81spills
  4. 4
    Billingham STW

    Northumbrian Water

    71spills
  5. 5
    Portrack Sewage Treatment Works

    Northumbrian Water

    58spills

Spills over time

The median outlet on Tees recorded 17.5 spills in 2025, against 11 across England.

31 outlets have a comparable count for both 2024 and 2025, with the monitor working at least 90% of each year. 7 recorded more spills, 20 fewer and 4 the same. Together they went from 1,085 to 848 spills, a fall of 22%.

Largest rises from 2024 to 2025

YearOutlets with a countTotal spillsMedian per outletEngland median
20254096517.511
2024401,1861619
202329346.520
20222422113
202128944.519

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 Tees

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

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: GB510302509900. The official waterbody record is a source lookup; its classification is not imported here.

All sourcesHow the data worksReport pollution

Questions about Tees

Which outlets are linked to Tees?
The source links 40 outlet records to waterbody GB510302509900. The link comes from the annual return; it does not model where a discharge travelled.
How many spills were recorded for Tees?
40 records report 965 spills in 2025 and 5,061 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 Tees?
Northumbrian Water operates every listed outlet. Contact the operator or the official pollution service if you see a problem in the water.
Which outlets on Tees are linked to a live feed?
37 of the 40 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 Tees?
4 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 Tees is safe?
No. Event duration data does not measure bacteria, chemicals or current water quality. Use official local water-quality advice for that question.