Table 3. Summary statistics of the microbiological quality of samples of source and drinking water collected at each follow-up visit.

	Source					Drinking					Paired samples
	n	AM	95% CI	WM	95% CI	n	AM	95% CI	WM	95% CI	n	Mean Log10 difference	95% CI	% with>1 Log10 reduction	n	% with>1 Log10 reduction among sources TTC>0
Rural
Visit 1	92	22.9	9.7–36.1	3.7	3.3–6.6	87	55.2	17.0–93.5	2.8	1.5–4.9	84	0.06	−0.2–0.3	13.1	46	23.9
Visit 2	90	20.0	7.7–32.3	4.0	2.6–6.1	79	23.0	7.7–38.4	3.3	1.9–5.4	79	0.09	−0.1–0.3	12.7	47	21.3
Visit 3	79	27.9	16.8–39.1	5.9	3.6–9.3	66	39.7	7.5–71.8	4.6	2.5–7.9	66	0.07	−0.1–0.3	13.6	42	21.4
Urban
Visit 1	92	19.7	13.6–25.9	3.7	2.2–5.9	89	41.2	11.2–71.2	2.1	2.1–3.7	85	0.14	−0.1–0.4	21.2	37	48.7
Visit 2	86	31.0	19.4–42.6	7.6	4.7–11.8	82	37.3	10.9–63.6	2.0	1.0–3.5	78	0.44	0.2–0.7	34.6	46	58.7
Visit 3	86	24.0	10.8–37.3	4.4	2.7–6.8	80	46.0	6.3–85.8	2.4	0.6–2.5	76	0.36	0.1–0.6	25.0	44	43.2

AM =  Arithmetic mean, WM =  Williams mean.