TABLE 4.

Apparent first-order rate constants for bacterial oxidation of ¹⁴CH₂Br₂ and ¹⁴CH₃Br^a

Water type	kapp (day−1) for:
	Dibromomethane	Methyl bromide
Freshwater	0.30 ± 0.15 (2/2)b	0.20 ± 0.18 (3/3)
Estuarine	0.37 ± 0.31 (2/2)	0.019 ± 0.013 (10/4)
Coastal seawater	0.44 ± 0.10 (7/5)	0.0084 ± 0.006 (10/6)
Hypersaline-alkaline	0.58 ± 0.19 (4/3)	0.0023 ± 0.0017 (5/3)

^aValues were determined by using equation 1. 

^bAverage ± standard deviation. The values in parentheses are number of experiments/number of separately collected water samples.