Earlston, White Swan CSO
Storm overflow run by Scottish Water, discharging into Leader 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
The Environment Agency's official annual returns, counted the EA's way (12/24-hour spills). 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.
A spill is the EA's 12/24-hour count: the first 12 hours of a discharge count as one, each further 24 hours with discharge as one more. "Monitor" is the share of that year the monitor was working, so a 0 beside a working monitor is a real zero; "no data" means the monitor produced no usable data that year — not zero. Years before 2024 are matched to this site by name and location, because the EA's site IDs changed that year; a monitor figure beside one of them means the outlet's permit confirms the match.
Other outlets here
Scottish Water runs 3 other overflows within 300 m that also discharge into Leader Water. They share the sewer and the storm, so one outlet's figures are only part of what reaches the water.
Downstream of this overflow
Its water reaches 2 gauges next on the river map, on different channels: Sprouston (Tweed), 33.6 km along the river; Sprouston (River Tweed), 33.6 km along the river.
Water-sampling points downstream
The nearest Environment Agency sampling points the river map places below the gauges above. Points between this overflow and that gauge cannot be put in order with it on the map, so they are not listed.
- Tweed upstream confluence with River Till
50 km along the river, below Sprouston · Last sampled 4 Sep 2026 · 34 days ago - Tweed at Norham Bridge (B6470)
59 km along the river, below Sprouston · Last sampled 27 Aug 2026 · 42 days ago - Tweed downstream of Norham
61 km along the river · Last sampled 11 Sep 2013, before the imported period
A sample is dated: it is not the river now, and its results are on its own page. A sample taken after a discharge does not show that the discharge caused what was measured. Samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.
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
2 discharge periods since 20 Jun 2026. Recorded from the live status feed only — Scottish Water has not published an event-level log we hold, so this is what the feed has shown us, not a complete record. The official annual count is the figure to quote.
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30 min
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10 min
The year figures above use the EA's 12/24-hour counting method, so they are comparable with the official figures.
Rain nearby last 30 days
Nearest live rain gauge: Boleside, 8.8 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. Times are shown in UK local time. FloodRadar republishes the monitor's status; it does not measure discharges itself.