Monitoring our reach

Results from the HoTWater group in Henley provide a useful indication of conditions upstream, but they do not specifically reflect water quality at Wargrave and Shiplake.

SWIM are concerned about the health of our river, and the people who enjoy it, so we are planning to:

• Take weekly water samples at one or more locations around Wargrave and Shiplake, between May and October.

• Take occasional samples upstream and downstream of Wargrave Sewage Treatment Works.

• Use Roth R-Cards (& Surfers Against Sewage link), to test the samples for E. coli bacteria. 

• Publish the results. You can currently see a small number of 2025 test results for Shiplake below. You can also see them in the HoTWater app from Apple App Store.

Sponsors

Testing for E. coli does cost money — but by using R-Cards, we can keep the cost down to around £11 per test**.  

Tests have already been sponsored by Henley Sailing Club, and by local river users and residents. 

If you would like more information or would like to sponsor one or more tests, please contact us at:

 romaine.dapples.4i@icloud.com

We won’t ask for money until we have run some initial tests.

** £11 is based on the price that we actually paid for our first batch of tests. The price of tests is likely to vary over time, but all monies raised will be spent on buying as many tests as we can. If funds allow we may also include occasional lab based tests.

Results

Before reading the results below please make sure you have read the Terms and Conditions on our Home Page 

2025 test results: using Fluidion Alert 1 testing

2026 test results: using Roth R-Card E. coli testing

(Also, during 2026, we plan to publish occasional photographs of the R-Cards used in our tests. By doing so, we hope to provide insight into how the results have been obtained and interpreted. These photographs will be shared on the  SWIM in HoTWater blog )

2026 Sponsors:

Once we have seen results from some initial tests, we will ask for sponsorship, and will acknowledge the sponsors here:

J & I Crawford ,    Henley Sailing Club,  Your name here,    And yours

River conditions: