Sample ID

Drain outlet

Area, location

Latitude

Longitude

Elevation (m)

Sample I

2

Goalkhali, Bastuhara colony

22˚50'54.96"N

89˚30'47.37"E

3.0

Sample II

3

Boyra Shahanghat bridge

22˚49'35.48"N

89˚31'46.76"E

4.6

Sample III

7

Gallamari, Gallamari bridge

22˚48'3.75"N

89˚32'25.62"E

4.0