#	County	Water Quality Score	Overall Score
1	De Baca County, NM	86	58.6
2	Los Alamos County, NM	86	68.6
3	Chaves County, NM	58.1	36.1
4	Bernalillo County, NM	43.4	27.6
5	Curry County, NM	41.1	33.5
6	Eddy County, NM	36.6	36
7	Quay County, NM	31.3	53.3
8	Roosevelt County, NM	24.8	41.9
9	San Juan County, NM	24.3	33.2
10	Luna County, NM	23.9	59
11	Lea County, NM	23	36.1
12	Santa Fe County, NM	22.7	35.3
13	Lincoln County, NM	20.2	58.3
14	Harding County, NM	20	71.2
15	Sandoval County, NM	18.1	50.1
16	Grant County, NM	17.9	61.5
17	Otero County, NM	15.8	44.4
18	Valencia County, NM	14.2	31.9
19	McKinley County, NM	13.3	29.2
20	Socorro County, NM	12.2	54.4
21	Cibola County, NM	12.1	52.9
22	Taos County, NM	10.1	48.2
23	Sierra County, NM	7.4	53.1
24	Union County, NM	7	60.8
25	Guadalupe County, NM	5.3	60.1
26	Rio Arriba County, NM	4.4	60.6
27	San Miguel County, NM	4	45.9
28	Torrance County, NM	3.3	42.2
29	Mora County, NM	2.5	63.5
30	Colfax County, NM	2	54.4
31	Hidalgo County, NM	1.9	54.1
32	Catron County, NM	1.1	64

Water Quality data from WaterByCounty. See full details at WaterByCounty. Data updated February 2026.