Table 1. Physical parameters of sediments from Butuanon River
Sampling Stations
Key Industry
pH
% Silt
% Organic Matter
Upstream
None but preceeded with agricultural areas
7.1±0.3
31.46 ±0.42
3.365 ±0.505
Midstream
Furniture, Paint-thinner, Gas Station
7.0 ±0.1
39.19 ±2.26
4.692 ±1.470
Downstream
Food and Feeds, Galvanized Iron, Aluminum
7.1 ±0.2
45.25 ±0.87
5.375 ±0.526