** Shares of Environmental Group EGL.AX up as much as 11.5% to A$0.29, their highest level since February 13

** The emission control systems provider says it received an order for the design and construction of a A$1.9 million ($1.24 million) per- and poly-fluoroalkyl substances (PFAS) treatment plant

** The facility will treat both water and soil contaminated with PFAS, a persistent environmental pollutant of increasing regulatory focus, adds co

** Stock down 12.7% YTD, including the day's moves

($1 = 1.5323 Australian dollars)

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com))