Ty Coch Way Storm Overflow

Year by year

Dŵr Cymru Welsh Water's annual Event Duration Monitoring return to Natural Resources Wales (12/24-hour spill count), as compiled by The Rivers Trust. 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.

Discharges we have recorded

128 discharge periods since 6 Jan 2020, 1 still open. 128 of them come from Dwr Cymru Welsh Water's own event-duration-monitoring records (published by the company, Jan 2020 – Dec 2021); the live feed adds anything after that. The official annual count is the figure to quote.

• Fri 31 Dec 2021, 11:45
  ongoing
  still discharging · EDM log · 552 blocks
• Thu 30 Dec 2021, 08:30
  12 h 0 min
  ended 20:45 · EDM log · 2 blocks
• Mon 27 Dec 2021, 10:30
  4 h 45 min
  ended 15:30 · EDM log · 2 blocks
• Sat 25 Dec 2021, 16:45
  20 h 0 min
  ended 13:15 · EDM log · 3 blocks · over 20 h 30 min
• Fri 24 Dec 2021, 14:45
  1 h 0 min
  ended 16:00 · EDM log · 2 blocks
• Mon 13 Dec 2021, 05:00
  2 h 0 min
  ended 07:00 · EDM log
• Tue 7 Dec 2021, 12:30
  1 h 15 min
  ended 14:00 · EDM log · 2 blocks
• Mon 1 Nov 2021, 01:45
  15 min
  ended 02:00 · EDM log
• Sun 31 Oct 2021, 05:45
  10 h 45 min
  ended 16:45 · EDM log · 2 blocks
• Sat 30 Oct 2021, 04:30
  5 h 15 min
  ended 10:00 · EDM log · 2 blocks

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 815 raw blocks were merged into 128 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.