Riverfly Monitoring

Every month, local volunteers conduct Riverfly Monitoring on the Ash at several sites.  Their sampling technique involves a 3-minute kick sample of the river bed, and identification and counting of the aquatic invertebrates caught.  This gives a good indication of water quality and  can alert authorities to any recent pollution incidents. 

To find out more about Riverfly monitoring in Hertfordshire, or to get involved, please click here.

Design by LTD Design Consultants and build by Garganey Consulting.