In which case, the job becomes transferring the bottled samples into sample tubes in trays so that the machine can process them, and usually adding a barcode to each sample tube. The sample tubes need to be kept immaculate as well - some of the things that we test water for, like pesticides, are only present in miniscule concentrations. Might not actually save a great deal of time, and you need to buy and maintain a very expensive automated sampler.

When I used to work in the water industry, we were usually able to get PhD-qualified research chemists to do all this mind-numbing laboratory work. There's a bit of a surplus of qualified chemists compared to the number of chemist jobs available, so you got absurdly over-qualified people applying for these roles.