TABLE 3.

Levels of 4-CP and 2,4-DCP in potable water and WWTP effluent samples in mg/L (mean ± SD, n = 3).

Sample	4-CP					2,4-DCP
	Sample 1	Sample 2	Sample 3	Mean	SD	Sample 1	Sample 2	Sample 3	Mean	SD
WWTP influent	1.04 × 10ˉ⁴	1.15 × 10ˉ⁴	6.43 × 10ˉ⁵	9.43 × 10ˉ⁵	2.66 × 10ˉ⁵	9.81 × 10ˉ⁵	1.72 × 10ˉ⁴	6.39 × 10ˉ⁵	1.11 × 10ˉ⁵	5.51 × 10ˉ⁵
WWTP effluent	5.61 × 10ˉ⁵	1.27 × 10ˉ⁵	4.04 × 10ˉ⁶	2.43 × 10ˉ⁵	2.79 × 10ˉ⁵	ND	ND	5.40 × 10ˉ⁶	1.80 × 10ˉ⁶	3.12 × 10ˉ⁶
Bottled water brand A	ND	9.32 × 10ˉ⁷	5.81 × 10ˉ⁶	2.25 × 10ˉ⁶	3.12 × 10ˉ⁶	ND	3.68 × 10ˉ⁶	1.31 × 10ˉ⁵	5.60 × 10ˉ⁶	6.77 × 10ˉ⁶
Bottled water brand B	ND	6.95 × 10ˉ⁶	3.42 × 10ˉ⁶	3.46 × 10ˉ⁶	3.48 × 10ˉ⁶	5.56 × 10ˉ⁶	1.37 × 10ˉ⁵	3.68 × 10ˉ⁶	7.66 × 10ˉ⁶	5.35 × 10ˉ⁶
Bottled water brand C	ND	ND	9.78 × 10ˉ⁶	3.26 × 10ˉ⁶	5.64 × 10ˉ⁶	8.80 × 10ˉ⁷	ND	6.85 × 10ˉ⁶	2.58 × 10ˉ⁶	3.73 × 10ˉ⁶
Bottled water brand D	1.97 × 10ˉ⁶	8.90 × 10ˉ⁷	6.74 × 10ˉ⁶	3.20 × 10ˉ⁶	3.11 × 10ˉ⁶	1.47 × 10ˉ⁵	8.37 × 10ˉ⁶	6.28 × 10ˉ⁶	9.77 × 10ˉ⁶	4.36 × 10ˉ⁶
Tap water	9.96 × 10ˉ⁶	1.90 × 10ˉ⁵	ND	9.65 × 10ˉ⁶	9.50 × 10ˉ⁶	6.23 × 10ˉ⁶	1.90 × 10ˉ⁵	5.97 × 10ˉ⁶	9.27 × 10ˉ⁶	5.49 × 10ˉ⁶

ND, not detected.