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Radon in Bemidji, Minnesota

EPA puts Beltrami County, where Bemidji is, in Zone 2, its middle radon zone, and high results are common there: 40.7% of the 54 radon tests reported to CDC (2023) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    40.7%

    6.1 pts above MN

    Beltrami
    40.7%
    Minnesota
    34.6%

    Beltrami, 39th of 62 in MN, 2023

  • Median result

    3.0pCi/L

    Below action level

    Beltrami
    3.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of Beltrami's tests, 2023

  • Nearest county

    46.0%

    Hubbard, 26 miles

    Hubbard
    46.0%
    Beltrami
    40.7%

    63 tests, 2023

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    Beltrami, where Bemidji is

  • Tests reported

    54

    In Beltrami

    Beltrami
    54
    Hubbard
    63

    Reported to CDC before any fix, 2023

Read a result for Bemidji

Starts at Beltrami County's median, 3.0 pCi/L

3.0pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 3.0 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Beltrami County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

Bemidji, What is published

What is published for Bemidji

Information:

Every figure for Bemidji is a county's

Radon data is published by county, not by city, so for Bemidji it is Beltrami County's: its EPA zone (Zone 2) and the 54 tests reported to CDC for 2023. Only a test tells you about one home.

Bemidji covers 14.6 square miles of land, all of it in Beltrami County. About 15,770 people live there, 1,082 to the square mile.

Bemidji, Counties

The county Bemidji lies in

Measured

Beltrami County's EPA zone and the figures CDC publishes for it, 2023.

Beltrami CountyZone 2Moderate predicted potential

40.7%
Reported tests at or above 4 pCi/L
3.0 pCi/L
Median reported result
54 tests
Tests reported to CDC
10
Annual years on file

Beltrami County ranks 39th of 62 Minnesota counties with 30 or more tests for that period, 6.1 points above the 34.6% pooled across Minnesota's counties, 7.3 points above the national pool of 33.4%.

Measured from the middle of Bemidji, the nearest counties with a CDC figure for 2023 are Hubbard County (26 miles, 46.0% of 63 tests), Cass County (45 miles, 25.5% of 106 tests) and Becker County (53 miles, 52.2% of 46 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 25.5% to 65.0%; the farthest of them, Clay County, is 86 miles away at 65.0%.

The directory lists 2 businesses with an address in Bemidji, 2 for testing. Minnesota's other cities with a page of their own: Minneapolis, St. Paul, Plymouth and St. Cloud.

The counties around Bemidji

By distance from the middle of Bemidji; counties with 30 or more tests.

Nearest counties to Bemidji with 30 or more tests
CountyDistanceTestsAt or above 4 pCi/LMedian
Hubbard County26 mi6346.0%3.8 pCi/L
Cass County45 mi10625.5%2.3 pCi/L
Becker County53 mi4652.2%4.1 pCi/L
Itasca County58 mi13726.3%1.9 pCi/L
Polk County74 mi9060.0%4.7 pCi/L
Crow Wing County79 mi17730.5%2.7 pCi/L
Otter Tail County84 mi17161.4%4.8 pCi/L
Clay County86 mi10065.0%5.5 pCi/L

Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.

Bemidji, Geology

The ground under Bemidji

Predicted

Most of the ground under Bemidji is one class on USGS's geologic map: 98.0% of its land is moderate radon potential, with 2.0% high. 98.0% of it lies in the area the map calls Lake Agassiz Plain/Central Lowland-Western Lake Section, to which USGS gives a radon index of 10, in the moderate band (9 to 11).

USGS's geologic areas under Bemidji
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Lake Agassiz Plain/Central Lowland-Western Lake SectionSilty and clayey glacial deposits and lake deposits.Moderate1098.0%
Central Lowland-Western Lake SectionSandy calcareous till derived from carbonate rocks.High142.0%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Bemidji beside its county and Minnesota

The ground under Bemidji is close to Beltrami County's as a whole: 2.0% rated high against 5.3%. Minnesota as a whole has more high-potential ground than Bemidji: 61.1% of its land, against 2.0% here.

Share of land by USGS radon potential: Bemidji, the county it lies in and Minnesota
AreaEPA zoneLow potentialModerate potentialHigh potential
BemidjiBy countyNone98.0%2.0%
Beltrami CountyZone 2None94.7%5.3%
Minnesota87 counties, pooled by land areaVariesNone38.9%61.1%

The map rates the ground, not the air in any home.

Bemidji, Homes

Homes in Bemidji

Bemidji has 7,112 homes, and many share a building: 33% are in buildings of five or more, 46% are detached houses, against 69% across Beltrami County. Half of its homes were built before 1980, close to Beltrami County's 1986: 27% date from before 1960 and 32% from 2000 or later. Most occupied homes here are rented: owners live in 42% (Beltrami County: 69%). A tenant can run a test; a fix is the landlord's to make.

Homes in Bemidji, Beltrami County, Minnesota, 2019 to 2023
HomesBemidjiBeltrami CountyMinnesota
Housing units7,11221,5832,519,538
Detached houses46%69%66%
In buildings of 5 or more33%13%19%
Mobile homes6%12%3%
Built before 196027%19%29%
Built since 200032%31%22%
Middle year built198019861978
Owner-occupied42%69%72%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.

Local help

Bemidji, Professionals

Radon professionals listed in Bemidji

Businesses whose listed city is Bemidji, from the state registries and listings in the Radon411 directory, with the same business and certification status the directory shows.

2 listings with Bemidji as the city. See radon testing in Bemidji, or all radon professionals in Minnesota.

Bemidji, Local resources

Local resources for Bemidji

Who to ask in Minnesota: its radon program, test kits and professionals.

The program's own words on licensing and disclosure are on the Minnesota page.

What it means

Bemidji, Questions

Questions about radon in Bemidji

What radon zone is Bemidji in?

EPA's map puts Beltrami County, and with it Bemidji, in Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.

What are radon levels in Bemidji?

High results are ordinary around Bemidji: 40.7% of the 54 tests reported from Beltrami County for 2023 were at or above 4 pCi/L, the level at which EPA says to fix a home. The median reported result was 3.0 pCi/L.

Should I test my home in Bemidji?

Yes. Beltrami County reported about 22 of its 54 tests at or above 4 pCi/L. That is above Minnesota's pooled 34.6%, and ranks Beltrami County 39th of the 62 Minnesota counties with 30 or more tests. Which homes they were, no map can say. How to test a home.

What ground is Bemidji built on, as far as radon goes?

USGS's geologic map puts all of Bemidji on one named area, "Lake Agassiz Plain/Central Lowland-Western Lake Section", rated moderate for radon potential, radon index 10.

Is radon higher in the counties around Bemidji?

It depends which way you go. 5 of the 8 nearest counties with a figure report a larger share than Beltrami County's 40.7% and 3 a smaller one: from Cass County (25.5%, 45 miles off) to Clay County (65.0%, 86 miles off).

Who tests for or fixes radon in Bemidji?

Bemidji is the address of 2 businesses in Radon411's directory, all listed for testing, none for mitigation. Each entry names the public list it came from. Radon professionals in Bemidji.

The answers use the published figures of Beltrami County, the county Bemidji lies in.

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