R
RadonVerdict
EPA Zone Data 2026

North Dakota Radon Map, Levels & Testing Guide

View EPA radon zone classifications for every county in North Dakota. Open your county to compare basement test meaning, EPA action thresholds, and when mitigation pricing becomes worth checking.

53
Zone 1
High Risk
0
Zone 2
Moderate
0
Zone 3
Low Risk

Already Tested

View North Dakota Cost Estimates

If you already have a radon result, skip the directory and move straight to local price guidance.

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.

Already tested? Get your itemized mitigation cost estimate.

View North Dakota Mitigation Cost Estimates ->