Radon Mitigation in Airway Heights, WA

Much of Airway Heights stands on an old flood channel, now buried and packed with loose sand and gravel; one well log went through 349 feet of it without hitting bedrock. About three in four homes were built in 2000 or later. The state's radon record for the city rests on few tests, so a measurement in your own house matters more than usual here.

Or call (509) 278-2215

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

How it works in Airway Heights

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 Airway Heights 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 Airway Heights

The city says a building's location decides whether Avista or Inland Power supplies it, and the two energy rates differ by more than 5¢ per kWh, so check your bill before comparing fan costs. If a newer house already has a passive radon pipe, adding a fan and a circuit can be most of the job. Manufactured homes and slabs without a pipe start with a pressure-field test.

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

for a typical 60-watt fan running around the clock, depending on which utility serves your address. 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 Airway Heights

Airway Heights 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.

A buried flood channel under the West Plains

Airway Heights sits on the flat West Plains, where the city's plan describes thin topsoil and basalt outcrops in many places. Under much of the city, though, runs the Airway Heights Paleochannel, a buried Ice Age channel filled with free-draining flood sand and gravel. It is at least 255 feet thick near three of the city's wells. Outside the channel, the same flood deposits rest on fairly shallow basalt.

State geologic mapping shows what that sand is made of: mostly granitic and metamorphic grains carried in from the east, mixed with local basalt. The U.S. Geological Survey says flood, lake and wind-blown sediment derived from more uranium-rich rock in northeast Washington and north Idaho carries most of the region's uranium, while the basalt itself is generally low in it. Deeper down, a buried ridge of ancient metamorphic and granitic rock runs northeast beneath Fairchild Air Force Base and the northwest part of the city.

How much radon that ground gives off is poorly measured. The one census tract covering most of ZIP 99001 shows 9.8% of reported tests at or above 4.0 pCi/L, but that rests on just 6 high results out of roughly 60 tests. Across Spokane County the figure is 47.0%. A sample that small can swing either way, so treat the city figure as a placeholder, not a verdict.

of flood sand and gravel in one Airway Heights well log, with no bedrock reached⁶

Airway Heights questions