Table 3.

Estimates of Populations Using Domestic Wells with Arsenic >10 μg/L, and Lower and Upper Confidence Limits, by state for the conterminous U.S.

			population likely to have arsenic concentration >10 μg/L in domestic well water
				95% confidence limit
state	domestic well population	%	estimated population	lower	upper	rank by population, descending
AL	539 394	0.5	2592	1750	3960	43
AR	144 434	0.8	1147	803	1696	48
AZ	218 170	7.8	16 979	13 637	20 902	30
CA	2 476 047	4.7	115 823	91 768	145 900	5
CO	311 619	4.6	14 339	11 705	17 607	31
CT	871 373	6.0	52 105	36 138	74 452	16
DE	185 267	5.4	9925	6643	14 737	34
FL	1 907 603	2.7	50 924	33 060	78 014	17
GA	1 530 125	2.3	34 969	23 251	53 637	22
IA	591 403	6.0	35 650	28 006	44 865	21
ID	431 945	11	47 041	38 491	57 021	18
IL	1 155 342	5.9	67 709	53 347	85 636	11
IN	1 658 685	9.1	150 858	115 385	195 482	3
KS	150 883	4.1	6168	5059	7511	39
KY	663 634	1.0	6707	4680	9744	36
LA	587 505	1.1	6464	4331	9681	37
MA	533 820	5.7	30 549	22 067	41 883	24
MD	1 069 848	3.9	41 276	27 202	63 107	19
ME	560 801	18	102 452	80 281	128 879	6
MI	2 675 773	7.2	192 747	151 408	246 037	1
MN	1 127 975	7.1	80 353	64 209	100 266	9
MO	883 261	1.2	10 242	7587	14 058	33
MS	446 129	0.6	2804	1959	4047	42
MT	285 143	8.2	23 269	18 006	30 042	27
NC	3 303 760	3.6	119 633	76 523	187 279	4
ND	49 355	4.1	2014	1591	2659	45
NE	345 966	5.0	17 399	13 593	22 252	29
NH	445 540	14	60 962	45 643	80 275	13
NJ	964 107	4.2	40 563	26 951	60 496	20
NM	303 139	10	30 990	24 485	38 647	23
NV	157 998	14	21 533	17 769	25 641	28
NY	2 046 039	3.2	66 265	47 992	92 295	12
OH	1 830 099	10	189 191	118 913	294 655	2
OK	315 670	1.4	4337	3392	5622	41
OR	606 611	4.3	26 051	20 233	33 612	26
PA	3 345 559	2.4	80 729	52 104	126 925	8
RI	112 941	1.3	1509	1145	1998	46
SC	1 152 116	2.4	28 131	18 768	42 146	25
SD	75 585	1.6	1182	900	1663	47
TN	538 259	1.0	5245	3448	8102	40
TX	2 440 586	3.9	95 455	74 590	122 294	7
UT	50 514	4.2	2131	1583	2816	44
VA	1 649 470	3.2	52 800	34 585	81 003	14
VT	181 611	5.3	9716	6988	13 363	35
WA	1 002 899	5.2	52 249	40 173	67 401	15
WI	1 644 873	4.4	72 670	58 722	90 438	10
WV	393 332	2.9	11 589	6309	20 661	32
WY	114 123	5.4	6215	5001	7761	38
Total	44 076 331		2 101 648	1 542 173	2 879 171	–