Biggar STW Inlet Works CSO And EO
Storm overflow run by Scottish Water, discharging into Biggar Burn.
"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 28 February (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.
Twin outlet
Scottish Water runs another overflow within 300 m that also discharges into Biggar Burn. They share the sewer and the storm, so one outlet's figures are only part of what reaches the water.
This overflow: 2 spills in 2025. Distances are between the published outlet points.
Downstream of this overflow
The next gauge downstream that the river map places is Lyne Ford (Tweed), 20.3 km along the river.
Water-sampling points downstream
The nearest Environment Agency sampling points the river map places below Lyne Ford. 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
115 km along the river · Last sampled 4 Sep 2026 · 27 days ago - Tweed at Norham Bridge (B6470)
125 km along the river · Last sampled 27 Aug 2026 · 35 days ago - Tweed downstream of Norham
127 km along the river · No sample published 1 Oct 2023 – 30 Sep 2026
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
6 discharge periods since 7 Feb 2024. 5 of them come from Scottish Water's own event-duration-monitoring records (published by the company, Feb 2024 – Jul 2025); the live feed adds anything after that. The official annual count is the figure to quote.
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Wed 23 Sep 2026, 06:1549 min
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Sat 19 Jul 2025, 16:5753 min
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Sat 14 Jun 2025, 11:4016 min
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Wed 29 May 2024, 23:4425 min
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Thu 8 Feb 2024, 15:022 h 5 min
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Wed 7 Feb 2024, 11:392 h 51 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: Biggar Burn, 4.3 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
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.