Is the river clean today? Storm overflows can release sewage into Dartmoor's rivers, especially after rain. This map shows the monitored overflow points and their recent status, so you can make an informed choice before you swim, paddle or let the dog in.
Open the full-screen river map →
How to read the map
Overflow status
Each marker is a monitored storm overflow. The colour shows whether it is spilling now, has spilled recently, or has been clear, based on the latest available readings.
What it does and does not tell you
The data reflects known, monitored overflows and the most recent readings, which can lag reality. Treat it as a strong guide, not a guarantee, and take extra care after heavy rain.
Swimming and paddling on Dartmoor
Choose your spot with care
Rivers rise fast on the moor and cold water carries its own risks. Combine this map with your own judgement, and check upstream as well as your chosen spot.
Storm overflow data via the National Storm Overflow Hub, Creative Commons Attribution 4.0. Our Dartmoor is a community project built with the help of AI. This information is provided in good faith and is not a substitute for official advice.
