River Dart water testing programme
We test weekly for bacteria along the length of the river to gain information to share with our community about the Water Quality in the River Dart and to evidence both the need for change and the changes as they happen.
Our River Dart Water testing programme is currently looking at E-coli and enterococcus in the river water. Bacteria samples are analysed in a lab and are of a comparable standard to sampling done by the Environment Agency and South West Water.
Is it safe to swim in the River Dart ?
Data collected by Friends of the Dart, the Environment Agency and other partners will help to slowly understand the level of bacteria in the water. It is important to note that our testing does not cover other harmful chemicals or toxins. It is also only one sample a week., which may miss pollution incidents that take place in between our samples. As far as we are aware, the pollution sources affecting the river have not changed significantly over the last few years. We can’t tell you if it is safe to swim, you must also assess river conditions and if they are suitable for your level of health.
As the picture becomes more complete we will work with experts to help interpret the data and provide guidance for people using the river.
Water Testing results
The following chart shows a high level summary of the sites being tested weekly by Friends of the Dart and the Environment Agency. Areas within the tidal section of the Dart are classified according to coastal bathing water standards. Those upstream of Totnes weir are classified according to inland bathing water standards.
Sites tested by the Environment agency are Steamer Quay Totnes, Stoke Gabriel, Dittisham and Warfleet Dartmouth. These sites will be tested until the end of September by the EA and then this testing will be continued by FOD. Sites tested by Friends of the Dart include Dartington Beach, Dartington Pontoon and Holne Weir.
Click on the image to make it bigger. The summary data shows that on the moor (at Holne) water quality is very good. Downstream in the tidal area (Dittisham, Stoke Gabriel and Dartmouth) where the river is wider it is generally good. In the middle of the river (Dartington, Totnes and Bidwell Brook) the results are very mixed and often poor. We’re investigating to understand the specific sources of pollution affecting this part of the river.
Site Specific results
The table above shows only a snapshot. Click on the links below to view more detailed information on each site.
Further results will be uploaded here. You may also download this presentation for more background.