The leading names in the roster include Tetra Tech (NASDAQ:TTEK), Roper Technology (NYSE:ROP) Ecolab (NYSE:ECL), Idexx Laboratories (NASDAQ:IDXX), Pentair (NYSE:PNR) and Danaher. 7 A-Rated Healthcare Stocks to Buy for the Long Haul Given that global freshwater has a limited supply, analysts expect water prices to surge faster than the inflation rate. On the results, CEO Walter Lynch remarked, ““In the first six months in 2021, we invested $782 million with the majority dedicated to needed infrastructure improvements to better serve our customers.