SEKSYEN 2 KUALITI AIR SUNGAI / SECTION 2 RIVER WATER QUALITY 2 (f) : Tren Kualiti Air Sungai Berdasarkan Sub-Indeks SS (2008- 2019) 2 (f) : River Water Quality Trend Based on SS Sub-Index (2008-2019) Buku KOMPENDIUM 2019