Dwr Cymru Welsh Water · overflow Curran Storm Overflow
Currently spilling
Recorded by the operator as Cardiff Bay.
The monitor for overflow Curran Storm Overflow (operator listed as Dwr Cymru Welsh Water) reports a spill into the Cardiff Bay (status timestamp in the public data: 2 Oct 2026 at 09:30 UTC).
📍 51.46769°, -3.17583°
1
spill event
14h
cumulative discharge
13.9 h
longest single event
2026-10-02
first event on record
In the last 30 days this overflow recorded 14h of discharge. Across Dwr Cymru Welsh Water's 2,359 monitored overflows the median was 0h. This site is in the top 7% by 30-day spill duration.
no rainfall data close enough
Rainfall comes from the nearest Environment Agency rain gauge within 10 km, using 15-minute readings rolled into hourly totals. Where a gauge is further away, or too many readings are missing, we say so rather than guess. Rain figures do not show whether a discharge was permitted; that is a matter for the regulator. How we keep the record.
The nearest Environment Agency rain gauge, Wick St Lawrence, is 19.8 km from this overflow. It recorded 0.0 mm in the last 48 hours.
| Day (UTC) | Rain |
|---|---|
| 2 Oct 2026 | 0.0 mm |
| 1 Oct 2026 | 0.0 mm |
| 30 Sept 2026 | 5.9 mm |
| 29 Sept 2026 | 0.5 mm |
| 28 Sept 2026 | 0.0 mm |
| 27 Sept 2026 | 0.4 mm |
| 26 Sept 2026 | 0.0 mm |
Rainfall comes from 15-minute Environment Agency readings rolled into hourly and daily totals; the 48-hour figure rests on 152 of 192 possible readings. The gauge is 19.8 km from this overflow, so it may not match the rain at the site itself, and the latest day may be incomplete. Rain figures do not show whether a discharge was permitted; that is a matter for the regulator. How we keep the record.
No surface-water sampling points within 5 km.
The record above is verifiable from public Environment Agency and water-company data. Three official accountability channels — pre-filled with the evidence on this page.
If you can see foam, sewage debris, dead fish, or smell something wrong — submit a citizen report. Confirmed reports are added to the Truth Engine and strengthen the public record on this overflow.
📷 Report what you saw →The official complaints route. Most companies require submission through their web form rather than email — open the form, then paste the pre-filled letter.
Subject: Storm overflow Curran Storm Overflow on the Cardiff Bay: request for information Dear Dwr Cymru Welsh Water, I am writing about storm overflow Curran Storm Overflow on the Cardiff Bay. Environment Agency storm overflow monitoring data for overflow Curran Storm Overflow on the Cardiff Bay (operator listed as Dwr Cymru Welsh Water) records 1 spill event starting between 2 September 2026 and 2 October 2026; none of them has a published end time. The most recent recorded event started on 2 October 2026 at 09:30 UTC. As of 2 October 2026 at 23:22 UTC, the monitor currently reports the overflow as spilling (status timestamp in the public data: 2 October 2026 at 09:30 UTC). Further details from the public record: - Open automated data flags on River Truth for this overflow: 1 (comparisons between public datasets, not findings of fault) - Location: 51.46769, -3.17583 - Sources: Environment Agency National Storm Overflow Hub and Water Quality Archive (Open Government Licence v3.0), cross-referenced via River Truth (https://rivertruth.co.uk/overflow/15180) These figures are taken from public monitoring data as published and may be revised by the publisher. They are not a finding that any permit condition has been breached. [Add your personal context here, for example how you use this stretch of water.] Please could you tell me: 1. Whether the monitoring record summarised above is accurate and complete 2. What caused the recorded spill events 3. What work, if any, is planned at this overflow, and on what timeline 4. What measures are in place to reduce spills from this overflow in future [Delete if not applicable: I have copied the Environment Agency, Ofwat and my MP into this correspondence.] Yours faithfully, [Your name] [Your address] [Your customer reference if you are a Dwr Cymru Welsh Water customer]
This overflow sits in the Cardiff South and Penarth constituency — currently represented by Stephen Doughty (Labour (Co-op)). Click below to open WriteToThem with the letter copied to your clipboard — paste it into the message box.
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Subject: Constituent query: storm overflow Curran Storm Overflow on the Cardiff Bay Dear [your MP, WriteToThem will fill this in], I am writing as your constituent about public storm overflow monitoring data for our area. Environment Agency storm overflow monitoring data for overflow Curran Storm Overflow on the Cardiff Bay (operator listed as Dwr Cymru Welsh Water) records 1 spill event starting between 2 September 2026 and 2 October 2026; none of them has a published end time. The most recent recorded event started on 2 October 2026 at 09:30 UTC. As of 2 October 2026 at 23:22 UTC, the monitor currently reports the overflow as spilling (status timestamp in the public data: 2 October 2026 at 09:30 UTC). Further details from the public record: - Open automated data flags on River Truth for this overflow: 1 (comparisons between public datasets, not findings of fault) - Location: 51.46769, -3.17583 - Sources: Environment Agency National Storm Overflow Hub and Water Quality Archive (Open Government Licence v3.0), cross-referenced via River Truth (https://rivertruth.co.uk/overflow/15180) These figures are taken from public monitoring data as published and may be revised by the publisher. They are not a finding that any permit condition has been breached. [Add your personal context here, for example how you and your family use this stretch of water.] I would like to ask: 1. Whether you support strengthening the regulatory regime for storm overflows, and monitor coverage in particular 2. Whether you would raise the monitoring data for this overflow with the Secretary of State for Environment, Food and Rural Affairs, the Environment Agency or Ofwat Yours sincerely, [Your name] [Your address (WriteToThem requires a postal address to verify your constituency)]
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For active pollution incidents — dead fish, foam, sewage on the riverbank — the EA hotline operates 24/7 and triggers a recorded investigation.