river water

river water (countable and uncountable, plural river waters)

1. Water in or taken from a river.
   • 1978, Haslam, River Plants, →ISBN, page 115:

     They can be changed in various ways; for instance, river water is more turbid than that of lakes, since rivers drain water from the land, ...

   • 2006, C. A. Brebbia & ‎J. S. Antunes do Carmo, Water Pollution VIII: Modelling, Monitoring and Management, →ISBN, page 67:

     All these five directly use Pavana River, thus river water quality is very important for them.

   • 2008, Makoto Taniguchi, ‎William C. Burnett, ‎& Yoshihiro Fukushima, From Headwaters to the Ocean, →ISBN:

     River waters are used as drinking water and irrigation water for agricultural fields.

• riverwater, river-water

• “river water” in Lexico, Dictionary.com; Oxford University Press.