24 May 2011

The weather is warming up in the US and in Oregon (where all that nice pine came from) the routine annual lake testing for blue-green algae is about to kick-off.  Grand Lake St Mary’s has vomited up masses of algae and the warning signs are going up.  They will need to add “Not So…” in front of this lake’s name soon.  The use of chemicals to control algae and plants in lakes in the US is a huge industry and they love using all sorts of herbicides to keep their waterways clear.  Not sure that I agree with this approach but there it is.  The Pompton Lakes (Jersey) are coming up for a dosing and I found an interesting comment from a reader – which shows that some people are properly informed (the last sentence is insightful): “I am surprised that algae or anything else grows in Pompton Lake, after Dupont dosed it with toxic chemicals for the last 100 years. Where do you think the high levels of mercury found in fish in the lake came from? The least the billion dollar profit making corporate giant Dupont could do is pony up some money to restore the daamge they’ve done in Pompton lakes! And the algae are growing due to overloads of pollutants (nutrients, phosphorus and nitrogen) and sediments caused by over-development in the watershed. Chemical treatment is NOT the answer – it is a costly band aid that causes its own environmental problems. The solution is t reduce the pollution and better aerate the pond”.

Lake Hamilton (Victoria, Oz) is still off-limits.  I came across a health warning published in Hungary, addressing the recent algal problems in Lake Rotorua in New Zealand and show this below.  It shows a high level of alertness for this type of problem.  Narrative detail is also provided.  This level of reporting to the world at large illustrates just how far South Africa still have to progress in this field of environmental management.

Leave a Reply

Your email address will not be published. Required fields are marked *