BMC Microbiology

Table 3 Water quality measurements for well water and drinking water

From: Early detection of viable Francisella tularensis in environmental matrices by culture-based PCR

Parameters^a	Well Water experiments					Drinking water experiments
Parameters^a	LVS	IN99	Schu4	mean	SD	LVS	IN99	Schu4	mean	SD
HPC (log₁₀ CFU mL⁻¹) on HIA	3.2	2.1	1.6	2.3	0.8	3.3	3.4	2.1	2.9	0.7
Total Coliforms (MPN 100 mL^− 1)	3.6	1.6	1.4	2.2	1.2	–	–	–	–	–
E. coli (MPN 100 mL^− 1)	34	< 1	< 1	–	–	–	–	–	–	–
pH^b	7.39	7.27	7.57	7.41	0.15	8.39	8.17	8.54	8.37	0.19
temperature (°C)^b	12.0	11.0	11.0	11.33	0.58	37.46	36.33	36.88	36.89	0.57
conductivity (μS cm⁻¹)^b	747	765	759	757	9	393	497	479	456	56
turbidity (NTU)	2.31	0.49	0.18	0.99	1.15	0.37	0.93	0.40	0.57	0.32
DO (%)	89.9	72.3	77.0	79.73	9.11	59.4	59.6	64.6	61.20	2.95
TOC	1.0	0.5	18.6	6.7	10.3	0.7	0.5	0.6	0.6	0.1
hardness^b	460	410	462	444	29	171	188	170	176	10
alkalinity	324	259	–	–	–	87	93	93	91	4
Free Cl₂	< 0.02	< 0.02	< 0.02	–	–	0.02	0.02	0.12	0.05	0.06
Total Cl₂	0.02	0.02	0.02	0.02	0.00	0.08	0.07	0.24	0.13	0.10
NO₃	0.82	0.93	1.00	0.92	0.09	0.74	0.47	0.51	0.57	0.15
PO₄	0.15	0.05	0.67	0.29	0.33	0.24	0.29	0.34	0.29	0.05
Ca	281.8	115.8	114.7	170.8	96.2	30.7	36.4	36.5	34.5	3.3
Cu	< 0.001	< 0.001	< 0.001	–	–	0.05	0.08	0.04	0.06	0.02
Fe	0.09	0.03	0.02	0.05	0.04	0.07	0.14	0.05	0.09	0.05
K	2.2	1.8	1.8	1.9	0.2	2.3	3.0	2.9	2.8	0.4
Mg	13.8	15.3	14.6	14.6	0.7	9.3	13.2	12.6	11.7	2.1
Na	7.1	7.8	7.7	7.5	0.4	18.5	29.4	27.9	25.3	5.9
P	0.04	0.02	0.01	0.03	0.02	0.10	0.16	0.15	0.14	0.03
Si^b	4.6	5.0	4.9	4.8	0.2	2.7	1.8	2.1	2.2	0.5
Zn	0.79	0.05	0.09	0.31	0.41	0.03	0.05	0.02	0.03	0.01

Abbreviations: μS cm-1 microSiemens per centimeter, HIA heart infusion agar, MPN most probable number, NTU Nephelometric Turbidity Units, SD standard deviation
“-”, not performed
^aunits are mg L⁻¹ unless stated otherwise
^bP < 0.01 between well and drinking water samples. Unpaired t-tests were performed for each parameter except total coliforms, E. coli, free and total Cl₂, and Cu

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