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. Author manuscript; available in PMC: 2024 Mar 7.

Published in final edited form as: Environ Sci Technol. 2015 Jun 4;49(12):7348–7355. doi: 10.1021/acs.est.5b00962

Table 4.

Statistical Comparisons of Log₁₀ Inactivation at Different Cyanuric Acid (CYA) Concentrations and Select Time Points

FC^c = 20 mg/L	p value
FC^c = 20 mg/L	CYA (mg/L)	0.5 h	1 h	2 h	3+ hr
	0 vs 8	0.355	0.080	<0.001^a	<0.001^a
	0 vs 16	0.268	0.056	<0.001^a	<0.001^a
	0 vs 48	0.837	0.328	0.012^b	<0.001^a
	8 vs 16	0.369	0.108	0.003^a	<0.001^a
	8 vs 48	0.910	0.424	0.031^b	<0.001^a
	16 vs 48	0.946	0.528	0.044^b	<0.001^a
			p value
FC^c = 40 mg/L	CYA (mg/L)	0.5 h	1 h	2 h	3+ hr
	0 vs 9	0.282	0.011^b	<0.001^a	<0.001^a
	0 vs 15	0.569	0.037^b	<0.001^a	<0.001^a
	0 vs 46	0.893	0.072	<0.001^a	<0.001^a
	9 vs 15	0.362	0.024^b	<0.001^a	<0.001^a
	9 vs 46	0.590	0.050^b	<0.001^a	<0.001^a
	15 vs 46	0.306	0.015^b	<0.001^a	<0.001^a

^a

significant (p ≤ 0.008) (adjusted significance level).

^b

marginally significant (p = 0.009–0.05).

^c

FC: free chlorine.