GROUNDWATER TESTING TESTING THE CHEMICAL AND PHYSICAL PROPERTIES OF GROUNDWATER: PENGUJIAN SIFAT KIMIA DAN FISIKA AIRTANAH . JISTECH [Internet]. 2024 Nov. 20 [cited 2026 Jul. 3];13(2). Available from: https://www.jistechunipa.com/index.php/istech/article/view/428