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Glengonnar Water

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

Glengonnar Water is a stream on Ordnance Survey’s river map near Crawfordjohn, South Lanarkshire, with about 10 km of mapped channel. On the map it flows into the River Clyde and out to the sea.

Next gauge downstream

Abington on the River Clyde, about 500 m along the river below where Glengonnar Water ends on the map.

0.66 m Normal · easing 15 min ago

After that, Sills of Clyde, about 43 km along the river.

No gauge measures Glengonnar Water 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.

Storm overflows on Glengonnar Water

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

Leadhills WwTW CSO Not discharging
Scottish Water · into Glengonnar Water · no official annual figure

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: © Scottish Water, near-real-time Overflow Map data, open licence for reuse. EDM monitors indicate overflows; they do not confirm them, and this is not advice on water quality.

On the map

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

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

The River Clyde, the river it joins →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 Glengonnar Water 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.
No water-sampling point with a banked sample is placed on this stream. Only England’s samples are banked, and only where the map can place their sampling point.
Nothing on this page says whether any place floods. For an address, see its postcode page.