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Bourne Brook

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

Bourne Brook is a stream on Ordnance Survey’s river map near Hazel End, Essex, with about 4.9 km of mapped channel. On the map it flows into the River Stort, which flows on into the River Lea (River Lee), then Nazeing Drain, then Holyfield Channel, then the River Lea (River Lee); beyond that the map has a gap, so where it goes next is not known.

Next gauge downstream

Bishops Stortford, Grange Paddocks on the River Stort, about 410 m along the river below where Bourne Brook ends on the map.

-0.26 mASD Below normal · steady 30 min ago

After that, Sawbridgeworth, about 9.7 km along the river.

No gauge measures Bourne Brook itself. A gauge downstream shows water that has already passed it, mixed with everything else that has joined on the way, so it says nothing exact about this stream.

Water-sampling points on Bourne Brook

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.

Bourne Brook Savenend Farm
Last sampled 11 Dec 2023 · 2.8 years ago · 3 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: Mallows Green, Uppend, Farnham Green, Chatter End, Hazel End, Level's Green, Hockerill.

Place names: OS Open Names. Contains OS data © Crown copyright and database rights 2026.

On the map

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

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

The River Stort, the river it joins →CM23 2BP, a postcode page near where it ends on the map (about 180 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 Bourne Brook itself, so its own level is not known here.
No storm overflow is placed on this stream on the river map. That is not the same as none: the map cannot place every overflow.
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.

This uses Environment Agency flood and river level data from the real-time data API (Beta). Licence: Open Government Licence v3.0.