Jakarta, Sept. 27 -- Indonesia's Ministry of Environment has found that most of the country's rivers are polluted, with all monitoring points in three provinces showing contamination.

Environment Minister Hanif Faisol Nurofiq said water quality monitoring in the first half of 2025 covered 4,480 points across 1,480 rivers. Results showed that 70.7 percent were moderately polluted.

"Only 29.3 percent met quality standards, usually located in the upper reaches of rivers," Nurofiq said in Jakarta on Saturday.

He noted that pollution was found at every monitoring point in Jakarta, the Riau Islands, and South Papua. Jakarta's river water, in particular, was deemed hazardous if consumed.

Nurofiq added that five priority river basins - the Ci...