DEVIANTO, L. A.; HARDIANTO, Y. Z. M. Y.; YUSUF, A. .; CHRISTIANDY, W. .; ELVILIANA, E. .; HAJI, A. T. S. . Preliminary Assessment of Spring Water Sources as Raw Water using the Weighted Arithmetic Water Quality Index in Batu City, Indonesia. Envirotek : Jurnal Ilmiah Teknik Lingkungan, [S. l.], v. 18, n. 2, p. 106–114, 2026. DOI: 10.33005/envirotek.v18i2.2393. Disponível em: https://envirotek.upnjatim.ac.id/index.php/envirotek/article/view/2393. Acesso em: 31 oct. 2026.