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Calder Water

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

Calder Water is a stream on Ordnance Survey’s river map near Kelvin, South Lanarkshire, with about 6.8 km of mapped channel. On the map it flows into Rotten Calder, which flows on into the River Clyde and out to the sea.

Next gauge downstream

Redlees on Rotten Calder, about 12 km along the river below where Calder Water ends on the map.

0.39 m Normal · easing 18 min ago

After that, Daldowie, about 14 km along the river.

No gauge measures Calder 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 Calder Water

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

East Kilbride, 100m U/S Flatt Bridge CSO Not discharging
Scottish Water · into Rotten Calder 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.

Places along it

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

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 Calder Water; grey lines are other mapped watercourses. Lines from OS Open Rivers (edition 2026-04).

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 Calder 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.