Community Lab Results

The results of our Community Water Lab will be posted here! For more information about the lab and how you can get involved or get a test done, visit our Community Water Lab page.

  • E. coli for recreation in inland waters in England is recommended to be <1,000 CFU/100mL.
  • This test also gives us a reading for total coliform, but there are no set recommended levels and so most people should be looking at E. coli.
  • Our regular tests allow us to test to up to >2,420 CFU/100mL. If we suspect that a sample will be higher than that, we perform a careful dilution with 50% mineral or distilled water (as well as a blank) to allow us to read results up to >4,840 CFU/100mL. In some instances, we dilute to 10% sample with 90% dilutant, allowing us to measure up to >24,200 CFU/100mL.
  • Each test is collected by, and processed by, volunteers on Friday mornings. We can only process samples that have been sponsored (by community sponsors or through a grant) or purchased (£15/sample, much more affordable than traditional labs).
  • Water Rangers is providing this information as a service to the community. Our code of conduct does not allow us to take any political stance. Learn more about our code of conduct to understand why.

Help us test regularly!

We need help to monitor these locations (and others) every week! Learn more about how you, your local councillor, or a local business can help us test!

June 7, 2024

Results for 7th June! Click on the Location ID to view trend data. Some locations are upstream/downstream from a point of interest.

May 31, 2024

Results for May 31st! Click on the Location ID to view trend data. Some locations are upstream/downstream from a point of interest.

May 23, 2024

Results for May 23rd! Click on the Location ID to view trend data. Click on the E. coli link to view the May 23rd results. Some locations are upstream/downstream from a point of interest.

May 17, 2024

Results for May 17th! Click on the Location ID to view trend data. Click on the E. coli link to view the May 17th results. Some locations are upstream/downstream from a point of interest.

May 10, 2024

Results for May 10th are ordered from the beginning of the river. Click on the Location ID to view trend data. Click on the E. coli link to view the May 10th results. Some locations are upstream/downstream from a point of interest.

May 4, 2024

All read over 2419.6CFU/100mL for total coliforms.

For E. coli, Shalford Mill read 770CFU/100mL. Peperharrow and Downstream of Slyfield read 2419.6CFU/100mL. The rest of the samples all read as greater than 2419.6 CFU/100mL. For reference, for recreation, levels should be below 1,000 CFU/100mL.

Individual location results:

Next week, we’re recommending a 50% dilution on all samples as well as sample locations in Bordon, Liphook, and Haslemere.

This monitoring was supported by a grant from Godalming Town Council.

Thank you!

Special thanks to this week's sponsor, Godalming Town Council. This lab also wouldn't be possible without the generosity of the River Wey Trust, ZERO Guildford, and the University of Surrey.