Reddit mentions of Water Supply and Pollution Control (7th Edition)

I'm pretty sure these three books were what I used in my water engineering classes. They should help you out. Amazon has some pretty good textbooks, too, and there are plenty of places online to find a pdf version of textbooks, though I always got those from classmates so I can't help you find them.

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https://www.amazon.com/gp/product/0131409700/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

https://www.amazon.com/Water-Wastewater-Engineering-Mackenzie-Davis/dp/0071713840

https://www.amazon.com/Hydraulic-Engineering-2e-John-Roberson/dp/0471124664?ref_=fsclp_pl_dp_1#reader_0471124664