Here’s our October round-up from River Mole River Watch citizen-science testing across the River Mole and a dip into exciting data from the new AquaWatch live "Waka" sensors installed in September. October’s long dry spell finally broke with some substantial rain in the days just before our test weekend. This brought a welcome fall in phosphate, nitrate and ammonia levels after very high concentrations were measured during the dry spell with low flow in September and early Oc

We're changing our water quality reporting format to include a shorter snapshot report each month with a more detailed quarterly seasonal...

Summer 2025 put the River Mole under real pressure. Following the driest spring in over a century, June and August brought parched conditions and record heatwave days. Normally this would mean rising pollution and stressed aquatic life — but a very wet July, with nearly double the usual rainfall, diluted the river just enough to avert a crisis. Our citizen science monitoring shows this was a near-miss. Phosphate levels dipped slightly compared with 2024, but more than 70% of