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Long Eau

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

Long Eau is a stream on Ordnance Survey’s river map near Great Carlton, Lincolnshire, with about 9.0 km of mapped channel. On the map it flows into Great Eau, which flows on into Saltfleet Haven and out to the sea.

Next gauge downstream

None before the water reaches tidal water, about 5.0 km downstream. Below that, gauges read the tide.

Storm overflows on Long Eau

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

Manby STW Not discharging
Anglian Water · into Long Eau · 2025: 18 spills, 20 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: © Anglian 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 Long Eau

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

Long Eau Three Bridges
Last sampled 7 Sep 2026 · 24 days ago · 35 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: Great Carlton, Three Bridges.

On the map

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

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

LN11 7TU, a postcode page near where it ends on the map (about 880 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 Long Eau 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.