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Monitoring Summary Report for March 2025
Monitoring Summary Report for March 2025
7th April 2025 - our summary of monitoring for March is published today, featuring our invertebrates of the month.
You can read it here.
Upper Itchen Restoration CIC awarded grant to monitor Oxygen levels in River
Upper Itchen Restoration CIC awarded grant to monitor Oxygen levels in River
March 2025 - Upper Itchen Restoration CIC has been awarded a generous grant by Winchester City Council under its Community Small Grants Scheme. This will enable us to add Dissolved Oxygen (DO) testing to our monitoring.
Good levels of DO are essential to many creatures living in the river. In particular, brown trout depend on high levels of DO, and their eggs will not develop without it. This is also true of many invertebrates, such as mayflies.
We believe that DO levels in the Itchen are not always sufficient for a healthy ecosystem. One factor is climate change (because warmer water can hold less oxygen, and our data shows gradual warming of water). Another is excess nutrients, which can cause algal blooms (like that of 2022), resulting in fluctuations in DO which impact on creatures living in the river – see our explainer on Eutrophication on our Nutrient Pollution page.
Appledown Lane Waste Water Treatment Works, Alresford
Appledown Lane Waste Water Treatment Works, Alresford
February 2025 - Southern Water has agreed to include a tracer study at the Appledown Lane waste water treatment works in Alresford in its planned programme of work, known as AMP8, for 2025-30. The Appledown Lane works discharges treated effluent into groundwater. Although this effluent has been treated at the works, it still contains levels of phosphate and other nutrients which could impact the chalk aquifer and the Upper Itchen ecosystem. Noone knows where this discharged effluent goes underground ! The tracer study is intended to find the route this waste water takes through the fissures in the underlying chalk, to establish if there are any negative impacts.
Upper Itchen Restoration CIC awarded grant for monitoring
Upper Itchen Restoration CIC awarded grant for monitoring
January 2025 - Upper Itchen Restoration CIC has been awarded a generous grant of £1,000 by New Alresford Town Council (NATC) to support continuing monitoring of water quality. The money will enable us to purchase consumables for other sampling equipment to continue monitoring at 10 river locations for 2 years up to 2027.
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