Septic suitability in Pacific County, WA
Very limited
USDA puts Pacific County, WA at "Very limited" for septic absorption fields, the dominant reading across 90.4% of the county's soil. Expect the ground itself to work against a plain gravity system; USDA's strictest bucket alone covers 90.4% of the county. The county spans 933.374 square miles, home to 24,245 people.
What this number does and doesn't tell you
USDA's survey covers the whole of Pacific County, WA at once, not any single address. Budget $750-$1,850 for a real perc test on any specific parcel - that's the only figure a permit application accepts.
Pacific County: conventional vs. engineered cost
90.4% of Pacific County carrying a "Very limited" reading changes the realistic budget here. Conventional systems run $3,000-$8,000 where they pass; where they don't, engineered alternatives (mound or aerobic treatment, whichever the health department requires) run $10,000-$40,000 - budget toward the higher figure until a perc test says otherwise.
Pacific County's rank among Washington counties
Among the 3,058 rated counties on this site, Pacific County, WA ranks 1,220 most-constrained nationally, and 23 of 39 within Washington.
Related guides
How this rating is built, and its real limits · Conventional vs. engineered septic systems