This is one of the data centres that went to the extra expense of building a closed loop cooling system that would, supposedly, not waste water on a continuous basis. Apparently, even these are not so clean to set up. Governments are going to need to start paying more attention to the commissioning process apparently.

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"Meta said that it's supporting its general contractor, Fortis, which stopped discharging and began hauling wastewater offsite"

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Governments should also watch where this wastewater is being hauled to, and likely just dumped.

This closed loop system needs to be filled and flushed, which is the operation discussed in the article. The bacterium was described as a possible airborne hazard if used for irrigation, it's not a regulated substance though so dump and dilute might be perfectly safe.