Cumnock Underwood STW (3 & 6 Dwf) CSO
Storm overflow run by Scottish Water, discharging into Lugar Water.
"Not discharging" means the company's monitor reports no discharge right now — not that the water is clean. The feed publishes status only; no discharge volume is measured.
Year by year
Scottish Water's overflow data reported to SEPA (number of overflow events; Scottish Water does not use the 12/24-hour count). 2026 is our own running count, the same way, from the live feed since 23 September (when we began keeping every discharge it reports) — so it can only be lower than the full year. The official figure is published next spring.
"No data" means the monitor was not working or not required to report that year — not zero. Scottish Water counts each overflow event; England and Wales count 12/24-hour "spills", so these numbers are not directly comparable with English or Welsh overflows.
Downstream of this overflow
The next gauge downstream that the river map places is Langholm A (Lugar Water), 6.8 km along the river.
A river gauge measures the level of the river; it does not measure this overflow's discharge, and a spill does not by itself explain a change there. Traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.
Contains OS data © Crown copyright and database rights 2026.
Discharges we have recorded
202 discharge periods since 1 Jan 2024. 197 of them come from Scottish Water's own event-duration-monitoring records (published by the company, Jan 2024 – Dec 2025); the live feed adds anything after that. The official annual count is the figure to quote.
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1 h 20 min
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25 min
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25 min
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1 h 10 min
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10 min
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19 h 30 min
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2 h 0 min
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18 h 0 min
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30 min
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2 d 6 h
Show 30 earlier (of 202)
| Started | Ended | Discharge time |
|---|---|---|
| 30 min | ||
| 1 h 15 min | ||
| 1 d 2 h | ||
| 3 d 9 h | ||
| 30 min | ||
| 30 min | ||
| 11 h 30 min | ||
| 3 h 0 min | ||
| 1 h 0 min | ||
| 2 h 0 min | ||
| 45 min | ||
| 1 h 15 min | ||
| 1 d 10 h | ||
| 45 min | ||
| 30 min | ||
| 14 h 15 min | ||
| 11 h 45 min | ||
| 14 h 45 min | ||
| 3 h 0 min | ||
| 9 h 30 min | ||
| 30 min | ||
| 1 d 8 h | ||
| 1 d 0 h | ||
| 30 min | ||
| 6 h 0 min | ||
| 15 h 0 min | ||
| 2 d 0 h | ||
| 2 d 3 h | ||
| 45 min | ||
| 45 min |
The year figures above use the EA's 12/24-hour counting method, so they are comparable with the official figures; the monitor log's 204 raw blocks were merged into 202 continuous discharge periods (gaps under 15 min joined).
Rain nearby last 30 days
Nearest live rain gauge: Blackdyke Farm, 8.3 km away. Brown shading = when this overflow was discharging; ▼ = a discharge start.
Overflow shading is a timing match, not proof of cause — heavy rain and spills share a trigger. Times come from the water company’s event-duration monitor (site status only; no discharge volume is published).
Where it is
Tell me when this overflow discharges
One message when the company's monitor reports a new discharge here. At most one every 6 hours.
Setting this alert needs JavaScript. The alerts you already have are on your alerts page.
The alert repeats the monitor's status: whether the overflow is discharging, not how much or why. It can only tell you about a discharge that starts after you turn it on.
Concerned about this overflow?
Report pollution you can see or smell to the regulator straight away; the company handles complaints about the overflow itself.
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. Spill-event history and annual figures: Scottish Water overflow event data, Open Government Licence. Times are shown in UK local time. FloodRadar republishes the monitor's status; it does not measure discharges itself.