Clachan Balvicar WwTW CSO 2009 Nm771177

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.

Discharges we have recorded

536 discharge periods since 3 Jan 2024, 1 still open. 536 of them come from Scottish Water's own event-duration-monitoring records (published by the company, Jan 2024 – Dec 2024); the live feed adds anything after that. The official annual count is the figure to quote.

• Thu 26 Dec 2024, 11:20
  ongoing
  still discharging · EDM log · 37 blocks
• Thu 26 Dec 2024, 08:51
  2 h 9 min
  ended 11:00 · EDM log
• Mon 23 Dec 2024, 17:06
  2 d 15 h
  ended 08:30 · EDM log
• Mon 23 Dec 2024, 10:24
  5 h 51 min
  ended 16:15 · EDM log
• Mon 23 Dec 2024, 09:00
  1 h 0 min
  ended 10:00 · EDM log
• Mon 23 Dec 2024, 07:27
  33 min
  ended 08:00 · EDM log
• Mon 23 Dec 2024, 05:45
  21 min
  ended 06:06 · EDM log
• Mon 23 Dec 2024, 04:09
  21 min
  ended 04:30 · EDM log
• Mon 23 Dec 2024, 03:28
  17 min
  ended 03:45 · EDM log
• Mon 23 Dec 2024, 02:40
  20 min
  ended 03:00 · EDM log

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 572 raw blocks were merged into 536 continuous discharge periods (gaps under 15 min joined).

Concerned about this overflow?

Report pollution you can see or smell to the regulator straight away; the company handles complaints about the overflow itself.