TABLE 2.

Dissipation of free chlorine in reclaimed water distribution systems

Location	Season	Chlorine concn (mg/liter)a
		Effluent	Storage	DS1b	DS2b	DS3b
California	Winter	2.5 A	0.15 E	0.13 E	0.09 E	0.02 E
	Spring	1.43 C	0.05 E	0.04 E	0.03 E	0.06 E
	Summer	1.78 B	0.14 E	0.11 E	0.11 E	0.14 E
	Fall	0.75 D	0.03 E	0.02 E	0.01 E	0.01 E
Florida	Winter	1.64 I	0.09 J	0.03 K	<0.01 K	<0.01 K
	Spring	4.33 G	0.08 J	0.65 J	0.20 J	0.10 J
	Summer	2.68 H	0.10 J	0.10 J	0.13 J	0.07 J
	Fall	5.06 F	0.20 J	0.15 J	0.14 J	0.03 J
Massachusetts	Winter	<0.01 Q	0.14 Oc	<0.01 Q	<0.01 Q	<0.01 Q
	Spring	<0.01 Q	0.23 Nc	0.10 P	0.10 P	<0.01 Q
	Summer	<0.01 Q	0.33 Lc	<0.01 Q	<0.01 Q	<0.01 Q
	Fall	<0.01 Q	0.28 Mc	<0.01 Q	<0.01 Q	<0.01 Q

^aFor each location numbers followed by the same letter in each row and numbers followed by the same letter in each column are not significantly different (P > 0.05). The mean concentrations are based on data for four replicates, and each replicate consisted of samples obtained on four consecutive days. Chlorination is not used at the New York site.

^bDS1, DS2, and DS3 are locations in the distribution system; DS1 is closest to the storage site, and DS3 is farthest from the storage site.

^cAt the Massachusetts site, chorine is added at the storage site instead of to the effluent.