Hawaii Radon Map, Levels & Testing Guide
Browse the 5 listed county pages surfaced for Hawaii. Open a listed county to compare its EPA zone, source caveats, testing meaning, and when mitigation pricing becomes worth checking.
High Risk
Moderate
Low Risk
Official Evidence in Hawaii
0 of 5 listed counties have official evidence
Open a county page to see the official source context: measurement fields, local burden, state percentile, and the next step for no reading, 2.0-3.9, or 4.0+ pCi/L.
0%
covered
Measured
0
State source
0
CDC source
0
Needs source detail
5
Already Tested
View Hawaii Cost Estimates
If you already have a radon result, skip the directory and move straight to local price guidance.
Understand the Number
2.0 vs 4.0 vs 8.0 pCi/L
Use the parent levels guide if you need the plain-English meaning of a radon result before browsing counties.
Need a Number First
Read the Testing Guide
Use the fastest valid radon test setup before you compare quotes or ask whether mitigation is worth it.
Browse Counties
Jump to the Directory
Open your county to see its EPA zone, testing meaning, and the point where mitigation becomes worth pricing.
Official State Resource
Hawaii radon program and rules
Use the state program link to verify local radon guidance, disclosure language, and contractor credential expectations before you act on an estimate.
Disclosure rule tracked
Hawaii requires sellers to complete a Seller's Real Property Disclosure Statement covering known defects and environmental hazards.
Credential note
Hawaii does not require specific radon licensing.
Already tested? Get your itemized mitigation cost estimate.
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