Oregon Soil Drainage Rankings

Oregon

How well does the soil drain across Oregon? 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 Trout Creek - Shaniko Area, Oregon at 99% well-drained soils. The most drainage-challenged is Crater Lake National Park, Oregon at 0%.

#	Survey Area	Well Drained	Poorly Drained	Dominant Class
1	Trout Creek - Shaniko Area, Oregon	99%	0%	Well drained
2	Umatilla National Forest, Oregon	99%	0%	Well drained
3	Wallowa-Whitman National Forest, Oregon	98%	0%	Well drained
4	Malheur National Forest, Oregon	98%	1%	Well drained
5	Gilliam County, Oregon	98%	0%	Well drained
6	Alsea Area, Oregon	98%	1%	Well drained
7	Wasco County, Oregon, Northern Part	97%	1%	Well drained
8	Sherman County, Oregon	97%	0%	Well drained
9	Wheeler County Area, Oregon	97%	0%	Well drained
10	Malheur County, Oregon, Northern Part	97%	1%	Well drained
11	Malheur County, Oregon, Southern Part	96%	2%	Well drained
12	Crook County Area, Oregon	95%	2%	Well drained
13	Grant County Area, Oregon	94%	4%	Well drained
14	Hood River County Area, Oregon	94%	5%	Well drained
15	Tillamook County, Oregon	94%	3%	Well drained
16	Lincoln County Area, Oregon	93%	3%	Well drained
17	Baker County Area, Oregon	92%	5%	Well drained
18	Curry County, Oregon	92%	2%	Well drained
19	Umatilla County Area, Oregon	92%	1%	Well drained
20	Willamette National Forest, Oregon	91%	0%	Well drained
21	Wallowa County Area, Oregon	89%	1%	Well drained
22	Douglas County Area, Oregon	87%	6%	Well drained
23	Coos County, Oregon	87%	5%	Well drained
24	Morrow County Area, Oregon	85%	0%	Well drained
25	Harney County Area, Oregon	85%	9%	Well drained
26	Lane County Area, Oregon	85%	8%	Well drained
27	Clatsop County, Oregon	84%	8%	Well drained
28	Union County Area, Oregon	79%	11%	Well drained
29	Jackson County Area, Oregon, Parts of Jackson and Klamath Counties	77%	4%	Well drained
30	Malheur County, Oregon, Northeastern Part	77%	15%	Well drained
31	Benton County, Oregon	77%	12%	Well drained
32	Lake County, Oregon, Northern Part, Parts of Lake and Klamath Counties	76%	3%	Well drained
33	Lake County, Oregon, Southern Part	75%	15%	Well drained
34	Josephine County, Oregon	74%	1%	Well drained
35	Warm Springs Indian Reservation, Oregon	73%	0%	Well drained
36	Clackamas County Area, Oregon	69%	16%	Well drained
37	Polk County, Oregon	69%	18%	Well drained
38	Linn County Area, Oregon	66%	21%	Well drained
39	Yamhill County, Oregon	65%	16%	Well drained
40	Klamath County, Oregon, Southern Part	60%	22%	Well drained
41	Upper Deschutes River Area, Oregon, Parts of Deschutes, Jefferson, and Klamath Counties	59%	3%	Well drained
42	Multnomah County Area, Oregon	59%	29%	Well drained
43	Washington County, Oregon	59%	18%	Well drained
44	Marion County Area, Oregon	57%	22%	Well drained
45	Columbia County, Oregon	50%	15%	Well drained
46	Deschutes National Forest, Oregon	31%	1%	Somewhat excessively drained
47	Winema National Forest Area, Oregon	9%	9%	Excessively drained
48	Crater Lake National Park, Oregon	0%	0%	Somewhat excessively drained