“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), vol. 8, no. 3, Aug. 2026, pp. 327-46, https://ijmir.edu.ng/index.php/ijmir/article/view/136.