The problem with environmentalists is that it is full of militants that aren't engineers and have very strong opinions that don't pass the most cursory smell test.
I am all open to there being problems with re-using water used to cool datacenters (hence my question). But 1) "it boils" defies common sense, no component in a computer should run at >100 degree celcius continuously, so I find it hard to believe that datacentres boil water (and I would have noticed the big cooling tower on the side of them). 2) Legionnaire disease is certainly a big deal in residential buildings with stagnant warm water, sitting in pipes sometimes for days until someone takes a shower. I fail to see how it is a major issue for a continuously flowing industrial application where the water spends very little time at elevated temperature and is continuously flowing before being released into colder water. 3) "contact with metal is bad" certainly doesn't come from someone who has seen the water supply chain in the UK or any European country with ancient infrastructures. Many of which are still made of lead. 4) "water is then not suitable for human consumption", well neither is the water in a lake. All drinking water has been filtered and sterilised. I would be surprised water used for cooling has been treated that way. So unclear to me why there would be any expectation that the water coming out of a datacenter should be any cleaner than the water coming out of a lake.
Now there is common sense, and there are regulations. The two often form a perfectly disjoint venn diagram. So I am happy to believe that there are regulations resulting in absurd situations. But from an actual risk point of view, I don't see how a datacenter "consumes" water, in any comparable way than a swimming pool, agriculture, chemical plants, or gardening, where the water cannot be used for anything else after that. To me it is more akin to a nuclear power plant, which releases water at a slightly higher temperature (despite actually boiling it), and therefore has a fairly limited impact on the water supply.
I am all open to there being problems with re-using water used to cool datacenters (hence my question). But 1) "it boils" defies common sense, no component in a computer should run at >100 degree celcius continuously, so I find it hard to believe that datacentres boil water (and I would have noticed the big cooling tower on the side of them). 2) Legionnaire disease is certainly a big deal in residential buildings with stagnant warm water, sitting in pipes sometimes for days until someone takes a shower. I fail to see how it is a major issue for a continuously flowing industrial application where the water spends very little time at elevated temperature and is continuously flowing before being released into colder water. 3) "contact with metal is bad" certainly doesn't come from someone who has seen the water supply chain in the UK or any European country with ancient infrastructures. Many of which are still made of lead. 4) "water is then not suitable for human consumption", well neither is the water in a lake. All drinking water has been filtered and sterilised. I would be surprised water used for cooling has been treated that way. So unclear to me why there would be any expectation that the water coming out of a datacenter should be any cleaner than the water coming out of a lake.
Now there is common sense, and there are regulations. The two often form a perfectly disjoint venn diagram. So I am happy to believe that there are regulations resulting in absurd situations. But from an actual risk point of view, I don't see how a datacenter "consumes" water, in any comparable way than a swimming pool, agriculture, chemical plants, or gardening, where the water cannot be used for anything else after that. To me it is more akin to a nuclear power plant, which releases water at a slightly higher temperature (despite actually boiling it), and therefore has a fairly limited impact on the water supply.