Dwr Cymru Welsh Water · overflow Rhydlewis South WwTW Storm Overflow
No active event
Recorded by the operator as Nant Collen.
The monitor for overflow Rhydlewis South WwTW Storm Overflow (operator listed as Dwr Cymru Welsh Water) reports no current spill. The data records 50 spill events totalling 1.7 h in the last 30 days.
📍 52.09925°, -4.41633°
255
spill events
8h
cumulative discharge
52 min
longest single event
2026-05-11
first event on record
In the last 30 days this overflow recorded 2h of discharge. Across Dwr Cymru Welsh Water's 2,359 monitored overflows the median was 0h. This site is in the top 20% by 30-day spill duration.
1 other overflow discharges into the Nant Collen.
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 Rhydlewis South WwTW Storm Overflow on the Nant Collen: request for information Dear Dwr Cymru Welsh Water, I am writing about storm overflow Rhydlewis South WwTW Storm Overflow on the Nant Collen. Environment Agency storm overflow monitoring data for overflow Rhydlewis South WwTW Storm Overflow on the Nant Collen (operator listed as Dwr Cymru Welsh Water) records at least 50 spill events starting between 18 September 2026 and 18 October 2026; the 44 with a published end time total 1.7 h. The most recent recorded event started on 17 October 2026 at 15:11 UTC. As of 18 October 2026 at 01:33 UTC, the monitor does not report the overflow as spilling. Further details from the public record: - On the Nant Collen, per the OS Open Rivers network (Ordnance Survey, Open Government Licence) - Location: 52.09925, -4.41633 - 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/14690) 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 Ceredigion Preseli constituency — currently represented by Ben Lake (Plaid Cymru). 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 Rhydlewis South WwTW Storm Overflow on the Nant Collen 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 Rhydlewis South WwTW Storm Overflow on the Nant Collen (operator listed as Dwr Cymru Welsh Water) records at least 50 spill events starting between 18 September 2026 and 18 October 2026; the 44 with a published end time total 1.7 h. The most recent recorded event started on 17 October 2026 at 15:11 UTC. As of 18 October 2026 at 01:33 UTC, the monitor does not report the overflow as spilling. Further details from the public record: - On the Nant Collen, per the OS Open Rivers network (Ordnance Survey, Open Government Licence) - Location: 52.09925, -4.41633 - 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/14690) 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.