Salen Septic Tank CSO
Storm overflow run by Scottish Water, discharging into Sound Of Mull.
"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 published data for monitored overflows (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.
Discharges we have recorded
107 discharge periods since 3 Jan 2024. 96 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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Wed 30 Sep 2026, 03:448 h 46 min
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Sun 27 Sep 2026, 18:323 h 23 min
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Sun 27 Sep 2026, 04:377 h 18 min
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Sat 26 Sep 2026, 03:3917 h 53 min
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Thu 24 Sep 2026, 20:2113 h 48 min
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Thu 24 Sep 2026, 14:571 h 6 min
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Thu 24 Sep 2026, 12:4755 min
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Thu 24 Sep 2026, 10:0132 min
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Wed 23 Sep 2026, 21:508 h 40 min
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Tue 22 Sep 2026, 20:0011 h 52 min
Show 30 earlier (of 107)
| Started (UK time) | Ended | Discharge time |
|---|---|---|
| 22 Sep 2026, 17:37 | 18:25 | 48 min |
| 19 Dec 2025, 14:59 | 17:32 | 2 h 33 min |
| 19 Dec 2025, 11:07 | 12:21 | 1 h 14 min |
| 19 Dec 2025, 05:55 | 06:45 | 50 min |
| 19 Dec 2025, 02:26 | 03:58 | 1 h 32 min |
| 18 Dec 2025, 15:33 | 23:11 | 7 h 39 min |
| 18 Dec 2025, 07:56 | 10:06 | 2 h 10 min |
| 18 Dec 2025, 04:18 | 04:38 | 20 min |
| 17 Dec 2025, 05:52 | 06:13 | 21 min |
| 15 Dec 2025, 08:43 | 09:03 | 20 min |
| 15 Dec 2025, 06:42 | 07:54 | 1 h 12 min |
| 15 Dec 2025, 03:00 | 03:38 | 38 min |
| 14 Dec 2025, 14:53 | 00:07 | 9 h 14 min |
| 14 Dec 2025, 11:22 | 12:43 | 1 h 21 min |
| 14 Dec 2025, 06:07 | 06:54 | 47 min |
| 13 Dec 2025, 23:09 | 02:27 | 3 h 19 min |
| 13 Dec 2025, 14:03 | 15:29 | 1 h 26 min |
| 10 Dec 2025, 20:22 | 22:07 | 1 h 45 min |
| 10 Dec 2025, 00:48 | 01:37 | 49 min |
| 9 Dec 2025, 21:02 | 21:19 | 17 min |
| 9 Dec 2025, 09:35 | 10:03 | 28 min |
| 9 Dec 2025, 06:42 | 08:01 | 1 h 18 min |
| 6 Dec 2025, 18:32 | 22:58 | 4 h 25 min |
| 27 Nov 2025, 06:07 | 08:03 | 1 h 56 min |
| 26 Nov 2025, 19:43 | 02:43 | 7 h 0 min |
| 6 Oct 2025, 15:20 | 21:19 | 5 h 59 min |
| 3 Oct 2025, 16:02 | 12:51 | 1 d 20 h |
| 2 Oct 2025, 17:02 | 01:47 | 8 h 45 min |
| 1 Oct 2025, 08:00 | 10:57 | 2 h 57 min |
| 27 Sep 2025, 15:45 | 17:08 | 1 h 23 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: Tobermory, 13.7 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.