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Mill Stream

A stream near Abbotsbury, Dorset. No gauge of its own: what the river map and the banked data say about it.

Mill Stream is a stream on Ordnance Survey’s river map near Abbotsbury, Dorset, with about 1.3 km of mapped channel. On the map it flows out to the sea.

Next gauge downstream

None: the lower end of Mill Stream is tidal on the river map. The tide carries water past a gauge both ways there, so no gauge is named downstream of it.

Storm overflows on Mill Stream

1 storm overflow is placed on this stream on the river map. Each status is the water company’s own monitor.

Church Street Pumping Station Not discharging
Wessex Water · into Mill Stream · 2025: 10 spills, 13 h

A status says whether an overflow is discharging now, never how much or why. A monitor that is offline or has not reported is not “not discharging”. Sewage in Britain’s rivers →

Live status: © Wessex Water storm overflow activity data, licensed under CC BY 4.0. Annual spill figures: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence (OGL) v3.0.

Water-sampling points on Mill Stream

2 Environment Agency sampling points are placed on this stream. These are dated samples taken by hand, not live readings, and FloodRadar does not grade them.

Mill Stream downstream of Horsepool
Last sampled 4 Sep 2026 · 27 days ago · 30 samples banked
Mill Stream at Abbey Barn
Last sampled 4 Sep 2026 · 27 days ago · 27 samples banked

A sample is taken on a date; it says nothing about the water today. A sample below an overflow does not by itself show where anything in it came from.

Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.

Places along it

From its source towards its mouth, the settlements within a kilometre of it on the map: Abbotsbury.

On the map

The map needs JavaScript. Everything it shows is listed on this page.

The blue line is Mill Stream; grey lines are other mapped watercourses. Lines from OS Open Rivers (edition 2026-04).

DT3 4JH, a postcode page near where it ends on the map (about 730 m away) →All rivers with gauges →

What this page can and cannot tell you

Its line, its name and where it flows come from Ordnance Survey’s river map (OS Open Rivers, edition 2026-04), which leaves out many small streams, ditches and culverts. “Flows into” is the map’s word: a channel that is not on the map is not shown here, which does not mean it is not there.
No gauge measures Mill Stream itself, so its own level is not known here.
Storm overflows are listed only where the river map places them on this stream; an overflow it could not place is not counted.
Water samples are England’s only (the Environment Agency’s archive), placed where the map can place their sampling point.
Nothing on this page says whether any place floods. For an address, see its postcode page.