Radon Mitigation in Mead, Colbert and Chattaroy, WA

North of Spokane the land climbs into granite highlands. Granite forms Mount Spokane and much of the rim around the Little Spokane River basin, and on the mountain's western flanks a uranium mineral fills cracks in it over roughly 100 square miles. In census tracts within the Mead, Colbert and Chattaroy ZIP codes, 39% to 57% of reported radon tests reached 4.0 pCi/L or more.

Or call (509) 278-2215

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

How it works in Mead, Colbert & Chattaroy

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 Mead, Colbert & Chattaroy 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 Mead, Colbert & Chattaroy

Who powers the fan depends on the address. Federal utility data list both Avista and Inland Power & Light in unincorporated Spokane County, and your electric bill tells you which one serves you. Crawl-space membranes under manufactured homes and long pipe runs on big rural houses cost more than a single slab point; the pressure-field test and a look at the foundation set the price.

Starting prices include the electrical permit and the post-mitigation test. Bold: systems common in Mead, Colbert & Chattaroy 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 Mead, Colbert & Chattaroy

Mead, Colbert & Chattaroy 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.

Granite, flood sand and clay north of Spokane

Mount Spokane and the south end of the Selkirk Mountains are two-mica granite, and the same rock is at the surface across much of the high ground ringing the Little Spokane basin. Many wells there are drilled straight into it. On the western flanks of the mountain, about 30 miles northeast of Spokane, the uranium mineral autunite coats fractures and shear zones over some 100 square miles, and the Daybreak mine took 13,400 tons of ore out of that ground by 1958.

U.S. Geological Survey geologists noted numerous uranium occurrences in the granitic hills north of Spokane and warned that buildings unknowingly placed on such concentrations are likely to have very high indoor radon. The same report put the expected average for homes in most alluvial valleys north and northwest of the city above 4 pCi/L. Along the Little Spokane, the Missoula floods left bars and terraces of sand and gravel hundreds of feet thick, and wind-blown dune sand covers the flood deposits around Mead and on western Peone Prairie.

Green Bluff is different again. It and its neighbors, Orchard Bluff, Pleasant Prairie and Orchard Prairie, are leftover basalt mesas sitting on Latah Formation clay and silt, with a cap of Palouse loess usually under 25 feet thick. One Green Bluff well passed through 595 feet of clay and silt. Granite slopes, sandy valley floors and clay-based mesas all fall inside the same few census tracts, so no area figure can sort them out. Only a test in the house shows its level.

of uranium ore, averaging 0.24% uranium oxide, mined on Mount Spokane's western flank through 1958²

Mead, Colbert & Chattaroy questions