Current status of the river
The Friends of the Mimram
The Friends of the Mimram website has links to measurements from the Environment Agency including
the current flow levels
Monthly and historical rainfall levels
Monthly and historical groundwater levels
Riverfly Monitoring
Every month, local volunteers conduct Riverfly Monitoring at 17 sites along the Mimram. 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, or to get involved, please click here.
Affinity Water monitoring programme
To provide a benchmark to demonstrate the environmental effectiveness of reducing water abstraction from Fulling Mill and Digswell, Affinity Water have developed a monitoring programme. This includes:
a Machrophyte survey
monthly river flow measurements