HYDROGEOCHEMICAL FACIES AND DRINKING-WATER SUITABILITY OF GROUNDWATER IN OIL-IMPACTED NIGER DELTA COMMUNITIES: A PIPER DIAGRAM AND WHO COMPLIANCE ASSESSMENT OF OKERENKOKO, KURUTIE, AND KUNUKUNUMA, DELTA STATE, NIGERIA. INTERNATIONAL JOURNAL OF MARITIME AND INTERDISCIPLINARY REASEARCH (IJMIR), [S. l.], v. 8, n. 3, p. 327–346, 2026. Disponível em: https://ijmir.edu.ng/index.php/ijmir/article/view/136. Acesso em: 12 nov. 2026.