Ardnadam Wwps Ns164803
Storm overflow run by Scottish Water, discharging into Holy Loch.
"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 Holy Loch. They share the sewer and the storm, so one outlet's figures are only part of what reaches the water.
This overflow: 3 spills in 2025. Distances are between the published outlet points.
Discharges we have recorded
709 discharge periods since 1 Jan 2021. 707 of them come from Scottish Water's own event-duration-monitoring records (published by the company, Jan 2021 – Dec 2025); the live feed adds anything after that. The official annual count is the figure to quote.
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Sun 26 Apr 2026, 01:054 h 0 min
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Sat 14 Feb 2026, 17:111 min
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Fri 19 Dec 2025, 08:2937 min
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Mon 24 Feb 2025, 07:291 h 36 min
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Fri 24 Jan 2025, 12:401 h 50 min
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Sat 23 Nov 2024, 13:3621 min
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Wed 27 Dec 2023, 04:004 d 19 h
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Sun 17 Dec 2023, 07:309 d 18 h
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Sun 17 Dec 2023, 03:001 h 45 min
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Sat 16 Dec 2023, 13:153 h 15 min
Show 30 earlier (of 709)
| Started (UK time) | Ended | Discharge time |
|---|---|---|
| 15 Dec 2023, 22:30 | 04:00 | 5 h 30 min |
| 15 Dec 2023, 13:00 | 15:45 | 2 h 45 min |
| 14 Dec 2023, 11:48 | 15:45 | 3 h 57 min |
| 14 Dec 2023, 00:00 | 11:00 | 11 h 0 min |
| 12 Dec 2023, 23:45 | 00:45 | 1 h 0 min |
| 12 Dec 2023, 05:00 | 23:00 | 18 h 0 min |
| 7 Dec 2023, 13:30 | 12:00 | 3 d 22 h |
| 2 Dec 2023, 15:15 | 16:15 | 1 h 0 min |
| 1 Dec 2023, 14:15 | 16:00 | 1 h 45 min |
| 30 Nov 2023, 14:00 | 15:00 | 1 h 0 min |
| 29 Nov 2023, 13:15 | 14:30 | 1 h 15 min |
| 28 Nov 2023, 13:00 | 13:30 | 30 min |
| 26 Nov 2023, 23:30 | 01:00 | 1 h 30 min |
| 22 Nov 2023, 02:00 | 03:00 | 2 d 1 h |
| 18 Nov 2023, 00:45 | 15:15 | 2 d 14 h |
| 16 Nov 2023, 19:15 | 17:00 | 21 h 45 min |
| 16 Nov 2023, 13:00 | 15:45 | 2 h 45 min |
| 14 Nov 2023, 06:30 | 09:15 | 2 d 2 h |
| 13 Nov 2023, 07:15 | 02:15 | 19 h 0 min |
| 12 Nov 2023, 23:00 | 01:15 | 2 h 15 min |
| 12 Nov 2023, 20:30 | 22:00 | 1 h 30 min |
| 11 Nov 2023, 23:15 | 00:00 | 45 min |
| 8 Nov 2023, 07:00 | 20:45 | 13 h 45 min |
| 5 Nov 2023, 17:30 | 18:00 | 30 min |
| 4 Nov 2023, 15:15 | 17:45 | 2 h 30 min |
| 3 Nov 2023, 14:45 | 17:00 | 2 h 15 min |
| 2 Nov 2023, 14:45 | 16:45 | 2 h 0 min |
| 1 Nov 2023, 08:15 | 11:00 | 1 d 2 h |
| 29 Oct 2023, 23:30 | 02:30 | 3 h 0 min |
| 29 Oct 2023, 11:15 | 21:30 | 10 h 15 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 710 raw blocks were merged into 709 continuous discharge periods (gaps under 15 min joined).
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.