Wales · Natural Resources Wales
Marine Lake, Rhyl
Use caution
Regulator classification: Sufficient.
High confidence — the regulator's own classification speaks for itself.
Status computed 27 Aug 2026, 01:28 UTC; statuses refresh every 15 minutes.
What we know
- Regulator classification
- Sufficient
- Pollution risk forecast
- Not published for this spot
- Active discharges
- None within 5km
- Recent discharges (last 48 hours)
- None within 5km
- Upstream river network
- None reported affecting this spot’s river reaches
- Surrounding overflow coverage
- Within an ingested water company network
- Monitoring season
- Currently in regulator monitoring season
Last sampled 12 August 2026 · 6 weeks ago. Source: Natural Resources Wales.
Risk forecasts are published for 14% of Welsh spots only.
Discharges traced through the river network by sewage-map.
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.