Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters

Table 2

Criterion maximum concentration and maximum contaminant concentration of some pesticides and heavy metals in freshwaters in the United States.

	CMCs (ng/ml)	MCLs (ng/ml)
Pesticides
Carbaryl	2.1	—
Chlorpyrifos	0.083	—
Diazinon	0.17	—
Parathion	0.065	—
Dieldrin	0.24	—
Lindane	0.95	0.2
Atrazine	—	3
2,4-D	—	70
Diquat	—	20
Heavy metals
Arsenic	340 (1.0)	10
Cadmium	1.8 (1.14)	5
Chromium^3+	570 (0.316)	50
Chromium^6+	16 (0.982)	50
Copper	- (0.96)	130
Lead	82 (1.46)	15
Mercury	1.4 (0.85)	2
Nickel	470 (0.998)	—
Silver	3.2 (0.85)	100
Zinc	120 (0.978)	500

Note: CMC: criterion maximum concentration for the recommended aquatic life in the United States. Numbers in parentheses of CMCs for heavy metals are conversion factors for dissolved metals. MCL: maximum contaminant limit concentration for drinking water in the United States.