Radon Mitigation in Medical Lake, WA

Unlike most of the West Plains, Medical Lake has old crystalline rock at the surface, set among three lakes with no visible inlet or outlet. In the census tract covering most of ZIP 99022, 37.8% of reported radon tests reached the EPA action level. The town's houses range from streets along the lakeshore to homes rebuilt after the 2023 Gray Fire.

Or call (509) 278-2215

48-hour test from $195 · Systems from $1,295 · Post-mitigation test included

How it works in Medical Lake

1. STEP 1
   Test

   A 48-hour continuous monitor in your lowest living level, under closed-house conditions. Report the same day it comes out.

2. STEP 2
   Look and quote

   We check the foundation, run a suction test and plan the pipe route for Medical Lake winters. You get a fixed price in writing.

3. STEP 3
   Install

   Most systems take one day: suction point, sealing, fan, manometer and the electrical permit.

4. STEP 4
   Re-test

   A post-mitigation test at least 24 hours after the fan starts shows the new number. The guarantee is below 4.0 pCi/L.

Radon mitigation cost in Medical Lake

Avista supplies electricity to Medical Lake and the surrounding area, according to the city's draft comprehensive plan, so a fan here runs at Avista's Washington rate. Because the ground shifts from gravel to basalt to damp lakeside soil, a pressure-field test before the quote shows how far suction will reach. A house with a crawl space next to a basement may need suction under both.

Starting prices include the electrical permit and the post-mitigation test. Bold: systems common in Medical Lake homes. Estimate your system →

for a typical 60-watt fan running around the clock. Energy charge only, at 2026 residential rates.

A 20-watt fan costs about a third of that, a 90-watt fan half again as much.

Permits and local rules in Medical Lake

Medical Lake at a glance

Area figures describe the neighborhood, not your home. Only a test tells you your number. Sources are listed at the end of this page.

Old rock at the surface around Medical Lake

Across most of the West Plains, ancient metasedimentary rock and younger plutonic rock lie buried under Columbia River basalt. Around Medical Lake the Missoula floods stripped the loess and basalt away, so the old rock stands in the open. Fancher Butte and Booth Hill are metasedimentary rock, while Olsen Hill, Riddle Hill and the upland between Medical Lake and West Medical Lake are intrusive rock.

Elsewhere basalt lies just below the surface, breaking through the topsoil in places and forming shallow basins in others. Soils follow the landforms: deep, well-drained ground on the uplands, formed in flood gravel, loess and volcanic ash, and soils from well drained to poorly drained around the shores. A thin sand-and-gravel aquifer near the surface rises and falls quickly with the weather. Ground conditions can change within a single neighborhood.

The census tract covering most of ZIP 99022 shows 37.8% of reported tests at or above 4.0 pCi/L, from 37 high results, while Spokane County as a whole stands at 47.0%. That tract holds nearly two-thirds of the ZIP's homes, so part of the area falls outside it. The U.S. Geological Survey calls the region's basalt generally low in uranium, but the state's radon data stop at the census tract and don't sort homes by rock type.

of reported results reached the action level in the main census tract of ZIP 99022⁶

Medical Lake questions