Arizona Soil Drainage Rankings

Arizona

How well does the soil drain across Arizona? We ranked every USDA survey area by the percentage of land classified as "well drained." Areas at the top of the list have soils where water moves through at a healthy rate — favorable for building, septic, and gardening. Areas at the bottom have more waterlogged or slowly-draining soils that may require engineered solutions.

The best-drained survey area is Yavapai County, Arizona, Western Part at 100% well-drained soils. The most drainage-challenged is Navajo Mountain Area, Arizona, Parts of Apache, Coconino and Navajo Counties at 20%.

#	Survey Area	Well Drained	Poorly Drained	Dominant Class
1	Yavapai County, Arizona, Western Part	100%	0%	Well drained
2	Apache-Sitgreaves National Forests, Arizona, Parts of Apache, Coconino, Greenlee, and Navajo Counties	100%	0%	Well drained
3	Coronado National Forest, Arizona, Parts of Cochise, Graham, Pima and Pinal Counties	100%	0%	Well drained
4	Fort Apache Indian Reservation, Arizona, Parts of Apache, Gila, and Navajo Counties	99%	0%	Well drained
5	Tonto National Forest, Arizona, Parts of Gila, Maricopa, Pinal and Yavapai Counties	99%	0%	Well drained
6	Eastern Maricopa and Northern Pinal Counties Area, Arizona	99%	0%	Well drained
7	Oak Creek-San Francisco Peaks Area, Arizona, Part of Coconino County	99%	0%	Well drained
8	Hualapai-Havasupai Area, Arizona, Parts of Coconino, Mohave, and Yavapai Counties	99%	0%	Well drained
9	Black Hills-Sedona Area, Arizona, Parts of Coconino and Yavapai Counties	98%	0%	Well drained
10	Gila-Duncan Area, Parts of Graham and Greenlee Counties, Arizona	98%	0%	Well drained
11	Beaver Creek Area, Arizona	98%	0%	Well drained
12	Santa Cruz and Parts of Cochise and Pima Counties, Arizona	97%	0%	Well drained
13	San Carlos Indian Reservation, Arizona, Parts of Gila and Graham Counties	97%	0%	Well drained
14	Grand Canyon Area, Arizona, Parts of Coconino and Mohave Counties	96%	0%	Well drained
15	Coconino County Area, Arizona, Central Part	96%	0%	Well drained
16	Pima County, Arizona, Eastern Part	96%	0%	Well drained
17	San Simon Area Parts of Cochise Graham and Greenlee Counties, Arizona	96%	0%	Well drained
18	Apache County, Arizona, Central Part	95%	2%	Well drained
19	Shivwits Area, Arizona, Part of Mohave County	95%	0%	Well drained
20	Cochise County, Arizona, Douglas-Tombstone Part	94%	0%	Well drained
21	Organ Pipe Cactus National Monument, Arizona	94%	0%	Well drained
22	Tucson-Avra Valley Area, Arizona	94%	0%	Well drained
23	Mohave County Area, Arizona, Northeastern Part, and Part of Coconino County	93%	0%	Well drained
24	Tohono O'Odham Nation, Arizona, Parts of Maricopa, Pima and Pinal Counties	92%	0%	Well drained
25	Graham County, Arizona, Southwestern Part	91%	0%	Well drained
26	Safford Area, Arizona	90%	0%	Well drained
27	Navajo County Area, Arizona, Central Part	87%	0%	Well drained
28	Kaibab National Forests, Arizona, Parts of Coconino, Mohave and Yavapai Counties	87%	1%	Well drained
29	Cochise County, Arizona, Northwestern Part	86%	0%	Well drained
30	Coconino County Area, Arizona, North Kaibab Part	86%	0%	Well drained
31	Canyon de Chelly National Monument, Arizona	85%	0%	Well drained
32	Long Valley Area, Arizona	84%	2%	Well drained
33	Fort Defiance Area, Parts of Apache and Navajo Counties, Arizona and McKinley and San Juan Counties, New Mexico	82%	0%	Well drained
34	Eastern Pinal and Southern Gila Counties, Arizona	81%	0%	Well drained
35	Yuma-Wellton Area, Parts of Yuma County, Arizona and Imperial County, California	79%	0%	Well drained
36	Aguila-Carefree Area, Arizona, Parts of Maricopa and Pinal Counties	78%	0%	Well drained
37	Willcox Area, Arizona Parts of Cochise and Graham Counties	78%	9%	Well drained
38	Maricopa County, Arizona, Central Part	76%	0%	Well drained
39	Pinal County, Arizona, Western Part	71%	0%	Well drained
40	Gila River Indian Reservation, Arizona, Parts of Maricopa and Pinal Counties	70%	0%	Well drained
41	Hopi Area, Arizona, Parts of Coconino and Navajo Counties	66%	0%	Well drained
42	Little Colorado River Area, Arizona, Parts of Coconino and Navajo Counties	62%	0%	Well drained
43	Colorado River Indian Reservation, Parts of La Paz County, Arizona, and Riverside and San Bernardino Counties, California	60%	0%	Well drained
44	Mohave County, Arizona, Southern Part	57%	0%	Well drained
45	Mohave County, Arizona, Central Part	50%	0%	Well drained
46	Chinle Area, Parts of Apache and Navajo Counties, Arizona, and San Juan County, New Mexico	41%	5%	Well drained
47	Luke Air Force Range, Arizona, Parts of Maricopa, Pima and Yuma Counties	35%	0%	Somewhat excessively drained
48	Kofa Area, Arizona, Parts of La Paz and Yuma Counties	30%	0%	Somewhat excessively drained
49	Cabeza Prieta Area, Arizona, Parts of Pima and Yuma Counties	30%	0%	Somewhat excessively drained
50	Gila Bend-Ajo Area, Arizona, Parts of Maricopa and Pima Counties	27%	0%	Somewhat excessively drained
51	Navajo Mountain Area, Arizona, Parts of Apache, Coconino and Navajo Counties	20%	0%	Excessively drained