Knob Noster, MO Radon Levels

Q: What EPA Radon Zone is Knob Noster in?

Knob Noster is in Johnson County, EPA Zone 2.

Q: How much does radon mitigation cost in Knob Noster?

Radon mitigation typically costs between $800 and $2,000. Most standard systems fall in the $1,000-$1,500 range.

Check local Knob Noster radon levels and find certified testing and mitigation professionals to keep your home safe

Knob Noster, MO Radon Facts

EPA Radon Zone Zone 2 — Moderate Risk 2–4 pCi/L (Zone 2)

County Johnson County, MO

Zip Code 65336

Located in west-central Missouri's Johnson County, Knob Noster sits near Whiteman Air Force Base where prairie geology over limestone bedrock creates moderate radon potential. The community's mix of military housing and civilian residences, combined with Missouri's variable radon conditions, suggests homeowners should consider testing. Although comprehensive data for zip code 65336 remains limited, the area's geological setting and housing characteristics warrant radon assessment, particularly in homes with basements or crawl spaces.

9.00

pCi/L area average

Above EPA Action Level

Johnson County average: 9.00 pCi/L, based on 1 user-submitted test across 1 city in the county. No homeowner readings have been submitted for Knob Noster itself yet, so this county figure is the closest available benchmark. The EPA recommends taking action at or above 4.0 pCi/L.

4.0 EPA

10+

Knob Noster, MO Radon Mitigation

Professional radon mitigation is the most effective way to permanently lower radon levels and protect your household.

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Radon Readings Near Knob Noster, MO

No homeowner tests have been submitted for Knob Noster yet. The closest cities with user-submitted radon data are shown below — explore them to gauge local conditions. Radon varies by home, so testing is the only way to know your level.

City	Distance	Avg User Level	Readings
Warrensburg	9.1 mi	9.00 pCi/L	1
Sedalia	18.2 mi	6.00 pCi/L	1
Cole Camp	29.4 mi	5.00 pCi/L	1
Oak Grove	35.1 mi	7.00 pCi/L	1
Pleasant Hill	36.9 mi	15.00 pCi/L	1
Warsaw	37.4 mi	5.00 pCi/L	1
Grain Valley	39.3 mi	14.00 pCi/L	2
Carrollton	41.6 mi	6.00 pCi/L	1

Johnson County Radon Profile

The soils and bedrock of Johnson County place it in EPA Radon Zone 2, a moderate-risk classification with predicted indoor averages of 2 to 4 pCi/L. Homeowner-submitted tests from 1 city in Johnson County average 9.00 pCi/L across 1 test — above the EPA's 4 pCi/L action level, reinforcing the need for testing across the county. Since radon is the second leading cause of lung cancer nationally, the EPA urges every household in Johnson County to test, as levels can differ between neighboring homes.

Radon FAQ for Knob Noster, MO

What EPA Radon Zone is Knob Noster in?

Knob Noster and the 65336 zip code are in Johnson County, which has an EPA assigned Radon Zone of 2. A zone of 2 predicts an average indoor radon screening level between 2 and 4 pCi/L.

Why are radon readings shown from areas near Knob Noster?

No homeowner radon tests have been submitted for Knob Noster yet. Because radon is driven by regional soil and bedrock geology, readings from the closest cities—and the Johnson County average—are the best available indicator of local conditions until Knob Noster homeowners submit their own results. The EPA still recommends testing every individual home, since levels can vary significantly from house to house.

How much does radon mitigation cost in Knob Noster?

Radon mitigation in Knob Noster typically costs between $800 and $2,000. Most homes with standard basements can be mitigated with a sub-slab depressurization system in the $1,000–$1,500 range. Factors that can increase cost include complex foundations, crawl spaces, or very high radon levels.

Should I test for radon if I'm buying a home in Knob Noster?

Yes. Radon testing should be part of every home purchase. A short-term radon test is typically included as part of the home inspection process and costs $150–$250. If elevated levels are found, you can negotiate mitigation as part of the sale.