Table 1.

Drinking water quality measurement results of samples.

Sample number	Water type	Latitude (south)	Longitude (east)	Altitude (m)	Temperature (oC)	pH	Electric conductivity at 25 °C (mS cm−1)	Radon activity concentration		Total hardness (mg L−1)	Chloride (mg L−1)	Sodium (mg L−1)	Sulfate (mg L−1)	Fluoride (mg L−1)	Nitrate (mg L−1)
								Dry season (Bq L−1)	Rainy season (Bq L−1)
1	Tap	2.77413	118.89231	776	31	7.4	0.92	617	31	32	0.55	10.79	0.68	0.22	0.01
2	Well	2.78188	118.86263	768	28	7.3	0.83	194	16	32	0.76	8.58	0.21	0.2	0.08
3	Well	2.77890	118.86933	775	27	7.0	0.16	100	18	102	0.96	22.67	8.06	1.12	0.05
4	Well	2.77168	118.86718	680	26	7.4	0.29	152	13	102	0.96	22.67	8.06	1.04	0.01
5	Tap	2.77789	118.86439	668	27	7.4	0.30	344	18	44	2.26	7.91	5.65	0.13	0.45
6	Well	2.77789	118.86447	671	26	7.3	0.30	333	18	68	5.18	7.85	6.84	0.09	1.52
7	Well	2.77811	118.86464	660	27	7.0	0.27	712	34	48	4.28	5.53	0.53	0.08	0.19
8	Well	2.77811	118.86351	750	27	6.6	0.25	1057	39	106	0.52	23.18	8.46	1.08	0.04
9	Well	2.77961	118.86400	645	27	6.4	1.25	1142	44	28	6.87	11.2	5.91	0.1	4.48
10	Spring	2.80878	118.88650	817	27	6.2	1.81	145	11	24	0.52	4.63	0.18	0.13	0.08
11	Well	2.80750	118.86761	737	26	7.1	0.04	39	6	25	0.87	7.16	0.34	0.12	0.19
12	Well	2.80570	118.86220	690	26	7.2	0.61	134	11	221	1.99	3.31	2.9	0.23	0.43
13	Tap	2.77433	118.81215	961	26	6.9	0.30	38	3	30	1.89	3.35	0.5	0.34	0.68
14	Tap	2.77450	118.81696	893	26	7.2	0.31	57	5	15	0.99	2.07	0.4	0.1	1.91
15	Tap	2.75886	118.85141	834	26	7.2	0.32	444	20	117	0.57	26.94	3.32	1.04	0.01
16	Well	2.75058	118.85583	760	27	7.1	0.29	16	2	244	0.7	2.28	2.32	0.17	1.65
17	Well	2.75020	118.85508	776	26	7.4	0.33	23	3	61	0.64	6.27	9.3	0.59	0.01
18	Well	2.75312	118.85666	751	26	7.3	0.33	117	9	241	0.93	2.41	2.25	0.16	1.71
19	Well	2.84733	118.81232	551	26	7.2	0.31	154	8	241	0.93	2.41	2.25	0.16	1.71
20	Well	2.84818	118.81026	543	26	7.1	0.35	143	8	241	0.93	2.41	2.25	0.16	1.71
21	Well	2.85315	118.87070	10	26	7.2	0.31	56	3	58	5.13	7.21	4.91	0.02	0.22
22	Well	2.85572	118.86898	15	26	7.4	0.32	66	4	56	4.6	7.24	4.91	0.02	0.22
23	Well	2.17331	119.22960	925	26	7.2	0.33	4	0.8	25	0.86	7.06	0.33	0.12	0.19
24	Well	2.17717	119.22865	826	26	7.3	0.29	4	0.8	28	0.97	7.94	0.38	0.13	0.21
25	Well	2.80378	118.86147	24	26	6.7	0.33	29	1	50	2.35	3.21	3.25	0.03	0.35
26	Well	2.79612	118.86265	25	26	6.8	0.32	35	2	45	2.12	3.25	3.95	0.02	0.31
27	Well	1.93528	119.36628	5	31	6.7	0.30	3	0.2	58	3.4	5.27	4.91	0.02	0.22
28	Well	1.94642	119.36285	5	31	6.7	0.30	2	0.2	58	3.4	5.27	4.91	0.02	0.22
29	Bottled water	-	-	–	26	7.1	0.16	1	0.2	25	0.02	3.63	0.08	0.13	0.06
30	Bottled water	-	-	–	26	7.0	0.16	1	0.2	23	0.02	2.63	0.1	0.13	0.05
Reference level					T* ± 3	6.5–8.5	1.56	11	11	–	250	200	250	1.5	50

T* = ambient temperature.