50% of our supply is from surface water (reservoirs and rivers) and 50% of our supply is from groundwater stored in underground aquifers.
After a dry start to September over a months’ worth of rain fell in the last 2 weeks resulting in above average rainfall for the region at 162% of the Long Term Average (LTA). Rainfall for the last 6 – 12 months has been split across the region with areas of the East seeing between 86-100% rainfall and areas of the North and West seeing between 108-151% of the LTA.
River flows across the region range from exceptionally high in the North and West, to exceptionally low in the East. River Base flows continue to remain low in the Rivers in the east following low rainfall in the summer months.
Groundwater levels show an East/West Split, with areas of the East exceptionally low for the time of year and similar to those seen in 1991. Exceptionally high levels are present in the aquifers in the North due to consistently average or above rainfall throughout the Summer months and into Autumn.
Although we’re not planning any customer restrictions this year, the amount of rainfall we receive this winter will be crucial to bolster our supplies for next year. Across Norfolk Suffolk and Essex, we need at least average amounts of rainfall throughout this winter to ensure there are no restrictions next year. We continue to monitor the situation very closely undertaking additional monitoring at our groundwater and surface water sites.
We ask our customers to remain “Waterwise” whatever the weather. Get some top tips on how to save drops.
The graphs below show monthly rainfall for the region compared to average and the volumes held in our main storage reservoirs up until the end of September 2019.
The Environment Agency also monitors the water resource situation and complies a monthly report, available from their website.