For those interested in GIS and water quality, be sure to read the latest JWMM paper by Shwesin Koko, Ranjna Jindal, and Romanee Thongdara from Mahidol University and Kim Irvine from the National Institute of Education (NIE) Singapore. Learn about spatial and temporal variations of dissolved oxygen in wastewater treatment ponds using GIS kriging interpolation for Cha-Am Municipality, Thailand.