EPA Zone Data 2026

Alaska Radon Map, Levels & Testing Guide

Browse the 2 listed county pages surfaced for Alaska. Open a listed county to compare its EPA zone, source caveats, testing meaning, and when mitigation pricing becomes worth checking.

Zone 1
High Risk

Zone 2
Moderate

Zone 3
Low Risk

Official Evidence in Alaska

2 of 2 listed counties have official evidence

Open a county page to see the processed verdict: source confidence, local burden, state percentile, and the next step for no reading, 2.0-3.9, or 4.0+ pCi/L.

100%

covered

Measured

State source

CDC source

Needs source detail

CDC Environmental Public Health Tracking Network Radon Tests from Labs: 2

Measured Risk Leaders in Alaska

County rankings from actual reported radon tests

These lists rank the visible Alaska county pages by measured radon signals, not by the EPA zone label alone. Use them to spot where the state hub has a real data story before opening individual county pages.

measured counties

State-level verdict

This hub has elevated measured counties, so the map is only the starting point.

The state hub is now doing a decision job: it separates first-click counties, retest counties, and lower-signal counties from 2 visible county measurement rows. 1 counties are elevated or high, including 1 where the EPA zone alone understates the measured signal.

First-click counties

Open Matanuska-Susitna County first when you need the strongest local answer. It is tagged Priority test from 23.3% 4.0+ - 3.3 pCi/L primary - 97 tests. 1 visible measured counties are elevated or high enough to review before lower-signal counties.

Buyer/seller lane

Buyer/seller lane: start with the elevated or high counties, require a fresh lowest-level test, and turn any 4.0+ property result into quote or credit math. The hub has 2 CDC-backed county rows to support that routing.

Retest lane

Retest lane: 2.0-3.9 pCi/L deserves more caution in the elevated/high county set than in lower-signal counties. The hub should send those users to county pages before product or cost paths.

Best county pages to open first

Start with these local evidence pages

Ranked by measured burden, 4.0+ share, test volume, and whether the EPA zone understates the measurement signal.

Matanuska-Susitna County

CDC Tracking

Priority test

23.3% 4.0+ - 3.3 pCi/L primary - 97 tests

Matanuska-Susitna County should be opened before lower-signal counties: 23.3% of reported tests at or above 4.0 and 3.3 pCi/L primary result. It is strong enough for testing and retesting language on the hub.

Anchorage County

CDC Tracking

Home-specific

7.2% 4.0+ - 1.6 pCi/L primary - 368 tests

Anchorage County is lower at county level: 7.2% of reported tests at or above 4.0 and 1.6 pCi/L primary result. Keep the page home-specific rather than presenting it as a statewide alarm.

Highest 4.0+ share

Matanuska-Susitna County 23.3%

Primary result 3.3 pCi/L - high-end 24.9 pCi/L

CDC Tracking

Anchorage County 7.2%

Primary result 1.6 pCi/L - high-end 21.5 pCi/L

CDC Tracking

Highest high-end reading

Matanuska-Susitna County 24.9 pCi/L

4.0+ share 23.3% - primary result 3.3 pCi/L

CDC Tracking

Anchorage County 21.5 pCi/L

4.0+ share 7.2% - primary result 1.6 pCi/L

CDC Tracking

Most reported tests

Anchorage County 368

4.0+ share 7.2% - primary result 1.6 pCi/L

CDC Tracking

Matanuska-Susitna County 97

4.0+ share 23.3% - primary result 3.3 pCi/L

CDC Tracking

Measured pattern

Among 2 visible counties with measurement tables, 0 land in the high measured-burden band and 1 land in high or elevated measured-burden bands. That lets this hub rank counties by observed test distribution instead of repeating the EPA map.

Map vs measurements

1 elevated measured counties are not EPA Zone 1. Those are the pages where the actual test distribution matters more than a map-only answer.

Source confidence

The measured rows shown here use CDC Tracking. This is still official evidence, but the hub should keep source caveats visible until a stable state table is available.

Already Tested