Wales · Natural Resources Wales
Jackson's Bay Barry Island
Avoid swimming
Welsh Water reports Penarth Kymin Storm Overflow is currently discharging and the operator's own published linkage names this bathing water as affected.
High confidence — the operator itself reports an active discharge affecting this water.
Status computed 23 Aug 2026, 05:43 UTC; statuses refresh every 15 minutes.
What we know
- Regulator classification
- Good
- Pollution risk forecast
- Not published for this spot
- Active discharges
- None within 5km
- Recent discharges (last 48 hours)
- 1 within 5km
- Upstream river network
- Downstream of a Welsh Water discharge in the last 48 hours
- Operator-published linkage
- Welsh Water names this bathing water as affected by Penarth Kymin Storm Overflow — discharging right now
- Surrounding overflow coverage
- Within an ingested water company network
- Monitoring season
- Currently in regulator monitoring season
Last sampled 4 August 2026 · 7 weeks ago. Source: Natural Resources Wales.
Risk forecasts are published for 14% of Welsh spots only.
Most recent at Barry Town Long Sea Storm Overflow (Welsh Water) — ended 21 Aug 2026, 19:00 UTC.
Sewage-map data as of 23 Aug 2026, 05:30 UTC — discharges traced through the river network.
The operator’s own published hydrological assessment — a stronger attribution than distance alone.
What this verdict means
Avoid swimming is driven by the strongest negative signals this map tracks: an active sewage discharge affecting this water, or a regulator classification of Poor or a closure. After a discharge ends, waiting at least 48 hours before swimming is the standard advice.
Every verdict here is computed from regulator classifications, sample dates, pollution-risk forecasts, and water-company discharge reports — it is not a water test. Absence of a negative signal is not positive confirmation of safety, and conditions on the day (rainfall, currents, cold) matter as much as water quality. Read how statuses are decided.