Table 2

Comparison of heavy metal levels in well water and city network water (µg/L).

		n	Mean	Std. Dev.	95% Confidence Interval for Mean		Minimum	Max.	P-values
		n	Mean	Std. Dev.	Lower Bound	Upper Bound	Minimum	Max.	P-values
Li	Network water	3	13.8633	.67122	12.1959	15.5307	13.17	14.51	.033
Li	Well water	3	16.5367	1.27962	13.3579	19.7154	15.06	17.32
Total	6	15.2000	1.72604	13.3886	17.0114	13.17	17.32
Be	Network water	3	.6817	.19741	0.1913	1.1721	.50	.89	.001
Be	Well water	3	−.3177	.05604	−0.4546	−0.1785	−.35	−.25
Total	6	.1820	.56253	−0.4083	0.7723	−.35	.89
Mg	Network water	3	38356.6667	812.97806	363.37.1112	40376.2161	37430.00	38950.00	.004
Mg	Well water	3	46000.0000	2138.24695	40688.3001	51311.6999	43550.00	47490.00
Total	6	42178.3333	4429.37656	37529.9877	46826.6790	37430.00	47490.00
P	Network water	3	−14.4133	2.00056	−19.3830	−9.4437	−16.71	−13.05	.076
P	Well water	3	−9.2710	3.17157	−17.1496	−1.3924	−12.91	−7.10
Total	6	−11.8422	3.68205	−15.7062	−7.9781	−16.71	−7.10
Cr	Network water	3	6.7373	.11261	6.4576	7.0171	6.62	6.85	.001
Cr	Well water	3	4.9013	.22542	4.3414	5.4613	4.70	5.15
Total	6	5.8193	1.01817	4.7508	6.8878	4.70	6.85
Mn	Network water	3	.9437	.54979	1.2246	3.9561	2.26	3.23	.027
Mn	Well water	3	2.5903	.62906	−0.6190	2.5063	.51	1.67
Total	6	1.7670	1.04530	0.6700	2.8640	.51	3.23
Fe	Network water	3	19.1100	2.30671	13.3798	24.8402	16.98	21.56	.397
Fe	Well water	3	22.3767	5.50390	8.7042	36.0491	16.31	27.05
Total	6	20.7433	4.17694	16.3599	25.1268	16.31	27.05
Co	Network water	3	.6363	.18413	0.1789	1.0937	.49	.84	.010
Co	Well water	3	.1050	.07721	−0.0868	0.2968	.02	.15
Total	6	.3707	.31724	0.0377	0.7036	.02	.84
Ni	Network water	3	1.9400	1.35064	−1.4152	5.2952	1.03	3.49	.908
Ni	Well water	3	2.0537	.86208	−0.0879	4.1952	1.35	3.02
Total	6	1.9968	1.01530	0.9313	3.0623	1.03	3.49
As	Network Water	3	12.2733	2.62348	5.7563	18.7904	10.65	15.30	.257
As	Well water	3	10.0153	1.36587	6.6223	13.4084	9.15	11.59
Total	6	11.1443	2.24251	8.7910	13.4977	9.15	15.30
Se	Network water	3	3.8573	6.96009	−13.4325	21.1472	−.79	11.86	.280
Se	Well water	3	−1.4750	2.51352	−7.7189	4.7689	−2.97	1.43
Total	6	1.1912	5.51674	−4.5983	6.9806	−2.97	11.86
Sr	Network water	3	706.8667	16.70968	665.3575	748.3758	688.00	719.80	.006
Sr	Well water	3	838.1667	39.04617	741.1706	935.1627	793.80	867.30
Total	6	772.5167	76.76870	691.9529	853.0805	688.00	867.30
Mo	Network water	3	−9.7567	.68743	−11.4643	−8.0490	−10.53	−9.22	.004
Mo	Well water	3	−12.2133	.17616	−12.6509	−11.7757	−12.40	−12.05
Total	6	−10.9850	1.41845	−12.4736	−9.4964	−12.40	−9.22
Cd	Network water	3	−2.2207	.82416	−4.2680	−0.1733	−2.90	−1.31	.006
Cd	Well water	3	−5.2780	.58929	−6.7419	−3.8141	−5.89	−4.72
Total	6	−3.7493	1.79298	−5.6310	−1.8677	−5.89	−1.31
Sn	Network water	3	1.1050	.26491	0.4469	1.7631	.85	1.38	.001
Sn	Well water	3	−.4310	.13583	−0.7684	−0.0936	−.56	−.29
Total	6	.3370	.86211	−0.5677	1.2417	−.56	1.38

Sn–stannic
Cd–cadmium
Mo–molybdenum
Sr–strontium
Se–selenium
As–arsenic
Ni- nickel
Co–cobalt
Fe–iron
Mn–manganese
Cr–chromium
Li–lithium
Be–berilium
Mg–magnesium
P - phosphorus