Home hazard report for 83648 — Mountain Home Afb, ID
ZIP 83648 is served by Mountain Home Air Force Base: 15 violations since 2016, latest lead result 4 ppb, PFAS 4 detected. Elmore County is in EPA radon zone 1.
Health-based violations since 2016: Nitrate. All are listed as resolved.
90th-percentile lead in the latest round (Jan 2026). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code.
Active weather alerts
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Where ZIP 83648 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Mountain Home Air Force Base
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Nitrate | 15 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Jan 2021.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS (“forever chemicals”)
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFHxA | 13 ppt | 3 of 6 | — |
| PFHxS | 10 ppt | 3 of 6 | — |
| PFPeA | 6.7 ppt | 3 of 6 | — |
| PFBS | 4.8 ppt | 1 of 6 | — |
| PFBA | not detected | 0 of 6 | — |
| HFPO-DA (GenX) | not detected | 0 of 6 | — |
| PFDA | not detected | 0 of 6 | — |
| PFOA | not detected | 0 of 6 | 4 ppt MCL |
| PFOS | not detected | 0 of 6 | 4 ppt MCL |
| PFNA | not detected | 0 of 6 | — |
| PFHpA | not detected | 0 of 6 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
Radon in Elmore County
EPA radon zone 1 — highest potential. Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.
Radon is a colorless, odorless radioactive gas from soil and rock, and the leading cause of lung cancer among non-smokers. EPA recommends fixing a home at 4 pCi/L or above and considering it from 2 pCi/L. A short-term test kit costs about $15–30. How radon zones work →
Natural hazard risk
FEMA rates the overall natural-hazard risk of this neighborhood (census tract) as Relatively Low, with very low social vulnerability and very low community resilience.
FEMA National Risk Index (December 2025): expected annual losses from each hazard combined with social vulnerability and community resilience, rated relative to all U.S. census tracts. Hazards not listed are not applicable here. It describes the area, not a single building; flood insurance maps (FEMA FIRMs) decide flood-insurance requirements.
Live conditions: river gauges and flood levels · tornado warnings · wildfire detections · earthquakes — our sister maps, updated from NOAA, USGS and NASA every few minutes.
Superfund sites nearby
| Site | Status | Distance |
|---|---|---|
| Mountain Home Air Force Base Mountain Home, Idaho · EPA ID ID3572124557 | Active (final NPL) | <1 mi |
EPA Superfund National Priorities List (NPL): the country’s most serious known hazardous-waste sites, each with an EPA cleanup record (linked). Distance is measured from the ZIP center to the site’s reference point; being near a site does not by itself mean exposure — EPA site pages describe what was found and how it is being cleaned up.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions about 83648
Who supplies drinking water to ZIP 83648?
Mountain Home Air Force Base (EPA ID ID4200054), a groundwater (wells) system serving about 7,500 people.
Is there lead in Mountain Home Afb, ID tap water?
The utility’s latest 90th-percentile lead result (Jan 2026) was 4 ppb; EPA’s action level is 15 ppb, falling to 10 ppb from 2027. Lead mostly comes from service lines and home plumbing, so the only way to know your tap is to test it.
Does Mountain Home Afb, ID water have PFAS?
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Has the water system in 83648 had violations?
Health-based violations since 2016: Nitrate. All are listed as resolved.
What natural hazards affect ZIP 83648?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Low; the highest-rated hazards are wildfire (relatively high), winter weather (relatively high), heat wave (relatively moderate).
Are there Superfund sites near 83648?
Active or proposed Superfund (National Priorities List) sites near the center of this ZIP code. Sites within 10 miles: Mountain Home Air Force Base (0.1 mi, Active (final NPL)).
Is radon a problem in Elmore County?
Elmore County is in EPA radon zone 1 (highest potential). Predicted average indoor radon above 4 pCi/L — EPA’s action level. Test your home.