Wales · Natural Resources Wales
Dale
Use caution
Sewage discharge in the last 48h from Marloes WwTW Storm Overflow (2 recent events within 5km, Welsh Water).
High confidence — a discharge in the last 48 hours is the driving signal.
Status computed 4 Nov 2026, 07:58 UTC; statuses refresh every 15 minutes.
What we know
- Regulator classification
- Excellent
- Pollution risk forecast
- Not published for this spot
- Active discharges
- None within 5km
- Recent discharges (last 48 hours)
- 2 within 5km
- Upstream river network
- Downstream of a Welsh Water discharge in the last 48 hours
- Surrounding overflow coverage
- Within an ingested water company network
- Monitoring season
- Currently in regulator monitoring season
Last sampled 3 September 2026 · 2 months ago. Source: Natural Resources Wales.
Risk forecasts are published for 14% of Welsh spots only.
Most recent at Marloes WwTW Storm Overflow (Welsh Water) — ended 3 Nov 2026, 06:59 UTC.
Sewage-map data as of 4 Nov 2026, 07:40 UTC — discharges traced through the river network.
What this verdict means
Use caution means at least one signal argues against swimming right now — a discharge in the last 48 hours nearby or upstream, an elevated pollution risk forecast, or a weak classification. The evidence above shows which signal is driving it.
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.