Table 2.

Hg concentration (mg/L) in water samples from the Ecuadorian Amazon

Province	n	Min	p50	Mean	p95	Max	S.D
Sucumbíos	36	0.0006	0.0011	0.0023	0.0078	0.0099	0.0025
Orellana	16	0.0005	0.0005	0.0011	0.0038	0.0088	0.0020
Napo	23	0.0006	0.0007	0.0025	0.0096	0.0099	0.0032
Pastaza	13	0.0005	0.0005	0.0005	0.0007	0.0011	0.0001
Morona Santiago	39	0.0005	0.0005	0.0010	0.0029	0.0041	0.0009
Zamora Chinchipe	20	0.0006	0.0013	0.0021	0.0054	0.0065	0.0018

0.006 mg/L = limit of Hg for human health protection in drinking water (INEN, 1108) 0.0002 mg/L = admissible quality criteria for the preservation of aquatic life and wildlife in fresh, marine and estuarine waters (TULSMA, 2015)