Dwr Cymru Welsh Water · overflow Gwendoline Street Sports Ground Storm Overflow
No active event
Ogwr Fawr
Recorded by the operator as Ogwr Fach River. The outfall is 1 m from the Ogwr Fawr on the Ordnance Survey river network, which is the river this page groups it under.
The monitor for overflow Gwendoline Street Sports Ground Storm Overflow (operator listed as Dwr Cymru Welsh Water) reports no current spill. The data records 18 spill events totalling 28 h in the last 30 days.
📍 51.61682°, -3.53935°
Spill record· since 6 May 2026
88
spill events
228h
cumulative discharge
32.5 h
longest single event
2026-05-18
first event on record
In the last 30 days this overflow recorded 28h of discharge. Across Dwr Cymru Welsh Water's 2,359 monitored overflows the median was 0h. This site is in the top 4% by 30-day spill duration.
On the Ogwr Fach River· 3 other overflows
3 other overflows discharge into the Ogwr Fach River. Combined recorded discharge in the last 30 days: 124h.
What the water company itself reported in its annual returns for this overflow, year by year, as republished by The Rivers Trust. Hours are the total reported discharge duration; monitor working is the share of the year the event monitor was operating (a figure of 0% may mean no usable monitoring data rather than no spills). These figures are the operator's own reporting, not our measurement, and our live record above begins on 6 May 2026.
Nearby water quality· 0 sampling points within 5 km
No surface-water sampling points within 5 km.
Take action
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.
Are you here right now?
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.
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 Gwendoline Street Sports Ground Storm Overflow on the Ogwr Fach River: request for information
Dear Dwr Cymru Welsh Water,
I am writing about storm overflow Gwendoline Street Sports Ground Storm Overflow on the Ogwr Fach River.
Environment Agency storm overflow monitoring data for overflow Gwendoline Street Sports Ground Storm Overflow on the Ogwr Fach River (operator listed as Dwr Cymru Welsh Water) records 18 spill events starting between 17 September 2026 and 17 October 2026; the 17 with a published end time total 28 h. The most recent recorded event started on 15 October 2026 at 23:30 UTC.
As of 17 October 2026 at 20:45 UTC, the monitor does not report the overflow as spilling.
Further details from the public record:
- On the Ogwr Fawr, per the OS Open Rivers network (Ordnance Survey, Open Government Licence)
- Location: 51.61682, -3.53935
- 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/13214)
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]
2. Write to the MP for this stretch
This overflow sits in the Rhondda and Ogmore constituency — currently represented by Chris Bryant (Labour). Click below to open WriteToThem with the letter copied to your clipboard — paste it into the message box.
Prefer to write to the MP for where you live? Enter your postcode and we'll redirect WriteToThem accordingly.
Preview the letter
Subject: Constituent query: storm overflow Gwendoline Street Sports Ground Storm Overflow on the Ogwr Fach River
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 Gwendoline Street Sports Ground Storm Overflow on the Ogwr Fach River (operator listed as Dwr Cymru Welsh Water) records 18 spill events starting between 17 September 2026 and 17 October 2026; the 17 with a published end time total 28 h. The most recent recorded event started on 15 October 2026 at 23:30 UTC.
As of 17 October 2026 at 20:45 UTC, the monitor does not report the overflow as spilling.
Further details from the public record:
- On the Ogwr Fawr, per the OS Open Rivers network (Ordnance Survey, Open Government Licence)
- Location: 51.61682, -3.53935
- 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/13214)
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)]
MP details are looked up live from the UK Parliament Members API under the Open Parliament Licence v3.0. River Truth makes no claim about this MP's voting or advocacy record on water issues — they are shown solely as the elected representative for this constituency.
3. Report to the Environment Agency
For active pollution incidents — dead fish, foam, sewage on the riverbank — the EA hotline operates 24/7 and triggers a recorded investigation.