Home hazard report for 02026 — Dedham, MA
ZIP 02026 is served by Dedham Westwood Water Dist.: 1 violation since 2016, latest lead result 2 ppb, PFAS 6.5 ppt. Norfolk County is in EPA radon zone 2.
Health-based violations since 2016: Tthm. All are listed as resolved.
90th-percentile lead in the latest round (Jan 2025). 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. 4 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 3.1 miles away.
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Where ZIP 02026 is
Dashed: ZIP area · blue: utility service area · scroll or pinch to zoomDrinking water: Dedham Westwood Water Dist.
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| Tthm | 1 |
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 Oct 2021.
Full record for Dedham Westwood Water Dist. →
Other systems overlapping this ZIP: Needham Water Dept.
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 |
|---|---|---|---|
| PFOA | 6.5 ppt | 4 of 8 | 4 ppt MCL |
| PFPeA | 5.9 ppt | 2 of 8 | — |
| PFOS | 5.1 ppt | 3 of 8 | 4 ppt MCL |
| PFHxA | 4.1 ppt | 1 of 8 | — |
| PFBS | not detected | 0 of 8 | — |
| PFBA | not detected | 0 of 8 | — |
| HFPO-DA (GenX) | not detected | 0 of 8 | — |
| PFDA | not detected | 0 of 8 | — |
| PFNA | not detected | 0 of 8 | — |
| PFHxS | not detected | 0 of 8 | — |
| PFHpA | not detected | 0 of 8 | — |
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 Norfolk 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 Relatively Low, with relatively moderate social vulnerability and very high 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 |
|---|---|---|
| Lower Neponset River Boston, Milton, Massachusetts · EPA ID MAN000102204 | Active (final NPL) | 3.1 mi |
| Norwood PCBs Norwood, Massachusetts · EPA ID MAD980670566 | Cleaned up & deleted | 4.6 mi |
| Materials Technology Laboratory (USARMY) Watertown, Massachusetts · EPA ID MA0213820939 | Cleaned up & deleted | 7.9 mi |
| Blackburn and Union Privileges Walpole, Massachusetts · EPA ID MAD982191363 | Active (final NPL) | 8.3 mi |
| Natick Laboratory Army Research, Development, and Engineering Center Natick, Massachusetts · EPA ID MA1210020631 | Active (final NPL) | 9.9 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 02026
Who supplies drinking water to ZIP 02026?
Dedham Westwood Water Dist. (EPA ID MA3073000), a surface water (rivers, lakes) system serving about 41,630 people.
Is there lead in Dedham, MA tap water?
The utility’s latest 90th-percentile lead result (Jan 2025) was 2 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 Dedham, MA 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. 4 PFAS compounds detected.
Has the water system in 02026 had violations?
Health-based violations since 2016: Tthm. All are listed as resolved.
What natural hazards affect ZIP 02026?
FEMA’s National Risk Index rates the overall natural-hazard risk here as Relatively Low; the highest-rated hazards are hurricane (relatively moderate), riverine flooding (relatively moderate), cold wave (relatively low).
Are there Superfund sites near 02026?
The nearest active Superfund site is 3.1 miles away. Sites within 10 miles: Lower Neponset River (3.1 mi, Active (final NPL)); Norwood PCBs (4.6 mi, Cleaned up & deleted); Materials Technology Laboratory (USARMY) (7.9 mi, Cleaned up & deleted).
Is radon a problem in Norfolk County?
Norfolk 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.