Navasota ISD approves air purifiers Posted in: News Navasota Independent School District Board of Trustees unanimously approved the purchase of air purifiers totaling $201,563 that will be used throughout the campus and on busses. NISD Assistant Superintendent of Operations Dr. Ronnie Gonzalez said $160,993 will be used to purchase air purifiers for classrooms, instructional areas, nurse’s stations, cafeterias, kitchens,PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today!