Blue Green Algae Alerts
Last updated on Friday 5th July 2024.
Blue-green algae can be present in lochs and other water bodies in Shetland, especially in warmer weather, people are asked to exercise caution where blooms can be seen. Dogs and livestock should be kept away from these lochs to prevent any potential health effects. The public are advised not to bathe in any affected waters and fishermen should also exercise caution.
Anyone coming across any suspected algal blooms is encouraged to make any reports (photographs can also be uploaded) using the ‘Bloomin Algae’ app. This is available to download from a link online at https://www.ceh.ac.uk/our-science/projects/bloomin-algae .
SEPA will receive alerts when local blooms are reported via the app. These details will then be assessed and a judgement made as to whether it is blue-green algae and if a sample of the water should be taken.
Warning signs will be issued as necessary. Any Currently affected lochs are detailed below.
The public can report any sightings directly to SEPA via their online form at www.sepa.org.uk/report or by calling their Pollution Hotline on 0800 80 70 60 or to the SIC Environmental Health Team on 01595 745250 or by emailing ehadmin@shetland.gov.uk or via contact form.
Location of most recently reported Blue-Green Algal Blooms
| Areas / Lochs Affected | Grid Reference |
|---|---|
| Clickimin Loch, Lerwick | HU 464 410 |
Further Information
- Blue-green Algae exist in fresh waters in Great Britain and throughout the world; they are noticed when their concentrations increase to form "blooms" and when they form scums - looking like blue-green paint - or when they collect on the shore line.
- Being in direct contact with Blue-green Algae may give rise to adverse medical effects including skin rashes, eye irritations, vomiting and diarrhoea, fever and pains in muscles and joints. Toxic algae has in the past caused deaths in livestock and dogs.
- The treatment of water supplies removes Blue-green Algae and additional treatment may be applied to destroy or remove toxins should they arise. The actions currently taken are precautionary.
- The behaviour of Blue-green algae is very erratic. The level of its toxicity can fluctuate; it can appear one day, be dispersed by the wind but then re-accumulate and grow quickly again at any time