Bacteriological and Physicochemical Studies on Tigris River Near the Water Purification Stations within Baghdad Province

Table 3

Statistical analyses of the total coliform and fecal E. coli from tap water of Al-Shula houses.

95% confidence		Standard deviation	Mean	Sample	Months	Indicators
Higher limit	Lower limit
0.36	0.00	0.35	0.11	10	June	Total coliform
1.11	0.00	0.78	0.55	10	July
7.49	0.00	5.31	3.69	10	August
1.85	0.15	1.19	1.00	10	September
2.3	0.38	3.00	1.34	40	Total
0.00	0.00	0.00	0.00	10	June	Fecal E. coli
0.72	0.00	0.70	0.22	10	July
4.79	0.00	3.52	2.27	10	August
1.68	0.00	1.26	0.78	10	September
1.47	0.17	2.03	0.82	40	Total