Home hazard report for 22172 — Triangle, VA
ZIP 22172 is served by Pwcsa - East: no health-based violations since 2016, latest lead result 0 ppb, PFAS 7.9 ppt. Prince William County is in EPA radon zone 2.
No health-based violations reported since 2016.
90th-percentile lead in the latest round (Jan 2021). Lead comes mostly from household plumbing and service lines, so individual homes can be higher.
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 7 PFAS compounds detected.
Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
FEMA’s overall natural-hazard risk for this census tract, relative to the rest of the U.S.
The nearest active Superfund site is 7.1 miles away.
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Where ZIP 22172 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Pwcsa - East
Health-based violations
No health-based violations reported since 2016.
Full record for Pwcsa - East →
Other systems overlapping this ZIP: Town of Quantico.
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 |
|---|---|---|---|
| PFPeA | 19 ppt | 4 of 4 | — |
| PFBA | 16 ppt | 3 of 4 | — |
| PFHxA | 16 ppt | 4 of 4 | — |
| PFOA | 7.9 ppt | 3 of 4 | 4 ppt MCL |
| PFBS | 7.4 ppt | 3 of 4 | — |
| PFHpA | 6.6 ppt | 3 of 4 | — |
| PFOS | 6.3 ppt | 3 of 4 | 4 ppt MCL |
| HFPO-DA (GenX) | not detected | 0 of 4 | — |
| PFHxS | not detected | 0 of 4 | — |
| PFDA | not detected | 0 of 4 | — |
| PFNA | not detected | 0 of 4 | — |
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 Prince William County
EPA radon zone 2 — moderate potential. Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.
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 Very Low, with relatively low social vulnerability and relatively 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 |
|---|---|---|
| Marine Corps Combat Development Command Quantico, Virginia · EPA ID VA1170024722 | Active (final NPL) | 7.1 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 22172
Who supplies drinking water to ZIP 22172?
Pwcsa - East (EPA ID VA6153600), a surface water (rivers, lakes) system serving about 168,747 people.
Is there lead in Triangle, VA tap water?
The utility’s latest 90th-percentile lead result (Jan 2021) was 0 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 Triangle, VA water have PFAS?
Highest PFOA or PFOS result in EPA’s 2023–2025 testing was at or above 4.0 ppt, EPA’s 2024 maximum contaminant level for each. 7 PFAS compounds detected.
Has the water system in 22172 had violations?
No health-based violations reported since 2016.
What natural hazards affect ZIP 22172?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Very Low; the highest-rated hazards are heat wave (relatively moderate), lightning (relatively moderate), strong wind (relatively moderate).
Are there Superfund sites near 22172?
The nearest active Superfund site is 7.1 miles away. Sites within 10 miles: Marine Corps Combat Development Command (7.1 mi, Active (final NPL)).
Is radon a problem in Prince William County?
Prince William County is in EPA radon zone 2 (moderate potential). Predicted average indoor radon between 2 and 4 pCi/L. Test your home; many homes here exceed 4 pCi/L.