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© 2026 PurityMap
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  1. PurityMap
  2. Water Quality
  3. Massachusetts
  4. DEDHAM WESTWOOD WATER DIST.MA3073000
Change
Updated 2026-09-16
Water system record · MA3073000

Dedham Westwood Water Dist.

Dedham Westwood Water Dist. serves 41,630 people from surface water. 31 results are on record. Two PFAS, PFOA and PFOS, are above their federal limits (2024 limits that water systems have until at least 2029 to meet); 1 more is detected with no federal limit, and everything else measured is within its reference or not detected.

Explore the findingsIs this my supplier?Follow
Purity ScoreHow the 62 is builtMA3073000 · 41,630 served
62/100 · FairConfidence: moderate
above a federal limit
2
detected, within reference or no limit
3
not detected
26
  • PFAS (forever chemicals)19
  • Metals & lead95
  • Disinfection by-products—Not monitored
  • Track record (violations)92

Subject scores out of 100. 3 of 4 subjects measured; disinfection pending a source.

System-level record, not a test of your tap. How we score

Source
Surface Water
Serves 1 city area on record.
Population
41,630
as reported to EPA
Type
Community Water System
Massachusetts
Cities
1
Dedham
Records
31 results
latest 2025
FindingsAll resultsComplianceWhat you can doProductsRecordsFAQ
What stands out

Two PFAS above the 2024 federal limit

Each bar is drawn in blocks of the 4.0 ng/L federal MCL (2024), so the length shows how far above it the result sits.

PFOA

Perfluorooctanoic acid

1.6× the limit

6.5ng/L

Each block = 4.0 ng/L federal MCL (2024)

EPA UCMR 5 · sampled 2025Evidence
PFOS

Perfluorooctanesulfonic acid

1.3× the limit

5.1ng/L

Each block = 4.0 ng/L federal MCL (2024)

EPA UCMR 5 · sampled 2025Evidence

Coverage by group

31 results on record
  • PFAS (forever chemicals)
    2 above · 2 detected · 25 not detected
  • Metals & lead
    1 detected
  • Disinfection by-products
    Not monitored
  • Other
    1 not detected
  • Above a limit or reference
  • Detected
  • Not detected
  • Not monitored
Every detected result

5 detected results, by distance from their limit

  • PFOA
    Perfluorooctanoic acid (PFOA)EPA UCMR 5 · 2025
    4.0 ng/L federal MCL (2024)
    6.5ng/L
    Above limit
  • PFOS
    Perfluorooctanesulfonic acid (PFOS)EPA UCMR 5 · 2025
    4.0 ng/L federal MCL (2024)
    5.1ng/L
    Above limit
  • Pb
    Lead (90th percentile)EPA SDWIS (Lead & Copper Rule) · 2025
    15 µg/L federal action level
    2µg/L
    Within reference
  • PFHxA
    Perfluorohexanoic acid (PFHxA)EPA UCMR 5 · 2025
    400,000 ng/L Michigan EGLE state MCL (strictest US state)
    4.1ng/L
    Within reference
  • PFPeA
    Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2025
    No federal or state limit; shown for transparency
    5.9ng/L
    Detected · no limit
26 other contaminants tested, none detected
  • 11Cl-PF3OUdS
  • 4:2 FTS
  • 6:2 FTS
  • 8:2 FTS
  • 9Cl-PF3ONS
  • ADONA
  • HFPO-DA (GenX)
  • NEtFOSAA
  • NFDHA
  • NMeFOSAA
  • PFBA
  • PFBS
  • PFDA
  • PFDoA
  • PFEESA
  • PFHpA
  • PFHpS
  • PFHxS
  • PFMBA
  • PFMPA
  • PFNA
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA
  • Lithium

Compliance and coverage

Lead service lines

12,657service lines inventoried

  • Lead13
  • Galvanized, to replace644
  • Material unknown2,753
  • Not lead9,247

From the utility's inventory reported to EPA (2026Q2). Look up your address with the utility.

Compliance

1health-based violation in the last 10 years

From EPA SDWIS. Counted once per contaminant per year, as in the Track record score.

Not in this recordDisinfection by-products weren't monitored in this dataset

No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.

A federal limit (an MCL or action level) is an enforceable legal cap; a health goal is often stricter. Meeting the limit is a compliance fact, not a health clearance, and PurityMap publishes no overall compliance verdict.

What you can do

Test first, then treat what was found

  1. 01 · TestTest your own tap

    Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.

    Certified lab
    How to test your tap →
  2. 02 · Treat PFASReverse osmosis, or carbon certified for PFAS

    PFOA 6.5 ng/L, above the 4 ng/L limit (+3 more PFAS detected)

    NSF/ANSI 58 or 53, with PFOA/PFOS/PFHxA/PFPeA named on the listing
    Treatment for PFAS →
  3. 03 · LeadLead-certified carbon filter, or reverse osmosis

    lead 2 µg/L, below the 15 µg/L action level

    NSF/ANSI 53 (lead)
    Treatment for Lead →

Understand water treatment technologies →

Understand:PFAS in DedhamLead in Dedham

Test your own tap

Screening tells you if something is worth a closer look; a lab result is the number you can act on.

As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.

  • Screening: quick check, not lab-grade

    Safe Home DIY Lead in Drinking Water Combo Test Kit

Questions

Frequently asked questions

Who does DEDHAM WESTWOOD WATER DIST. serve?

DEDHAM WESTWOOD WATER DIST. (PWS ID MA3073000) is a public water system serving 41,630 people in Dedham, Massachusetts.

Where does DEDHAM WESTWOOD WATER DIST. get its water?

DEDHAM WESTWOOD WATER DIST. is on record as drawing from surface water. The source shapes which contaminants matter most for this system.

What does DEDHAM WESTWOOD WATER DIST.'s monitoring record show?

PurityMap's record for DEDHAM WESTWOOD WATER DIST. holds 31 findings: 2 above a reference, 2 detected within the reference, 1 detected with no limit and 26 not detected, from 31 evidence records. Every finding links to its source; a substance that was never monitored is shown as pending, not as a pass.

Is DEDHAM WESTWOOD WATER DIST.'s water safe to drink?

PurityMap does not issue a safety verdict. It publishes DEDHAM WESTWOOD WATER DIST.'s measured results against each contaminant's benchmark so you can read them in context. Safety depends on the specific finding, your plumbing, and how the water reaches your tap.

How current is this DEDHAM WESTWOOD WATER DIST. data?

The latest published record for DEDHAM WESTWOOD WATER DIST. is dated 2026-09-16. Utilities report on regulatory cycles, so results reflect the monitoring period rather than a live reading.

Does this assessment represent my home's tap water?

No. It is assessed at the water-system level from DEDHAM WESTWOOD WATER DIST.'s own monitoring. It does not cover the service line to your building or the plumbing inside it, which can add lead and other metals after the water leaves the system. A tap test is the way to know what reaches your glass.

What contaminants were detected in DEDHAM WESTWOOD WATER DIST.?

Perfluorooctanoic acid (PFOA), Perfluorooctanesulfonic acid (PFOS), Lead (90th percentile), Perfluorohexanoic acid (PFHxA) and Perfluoropentanoic acid (PFPeA) were detected in this record. Each finding shows its measured value, its reference and its source on this page.

What should I do if I'm concerned about PFAS in DEDHAM WESTWOOD WATER DIST.'s water?

Start with what the record shows: the PFAS findings above list each measured value against its reference. This record cannot show your home's plumbing, so a tap test tells you what reaches your glass. If you decide to treat your water, look for a filter whose certification covers the specific PFAS compounds in your record; the section "Certified for a concern found here" lists only products with a current certification record for these concerns.

What should I do if I'm concerned about lead in DEDHAM WESTWOOD WATER DIST.'s water?

Start with what the record shows: the lead findings above list each measured value against its reference. This record cannot show your home's plumbing, so a tap test tells you what reaches your glass. If you decide to treat your water, look for a filter whose certification covers the specific contaminant in your record; the section "Certified for a concern found here" lists only products with a current certification record for these concerns.

Follow this water

Follow Dedham Westwood Water Dist.

One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.

Double opt-in: we email a confirmation link. Unsubscribe anytime. No spam.

Cities served by this system
  • Dedham

As listed for this system in EPA's records. Your water bill names your supplier.

Sources and dataAll 31 records and their sourcesEPA UCMR 5 · EPA SDWIS (Lead & Copper Rule)+
SubstanceResultReferenceSampledStatusEvidence
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)< 5 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)< 5 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)< 5 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)< 2 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)< 5 ng/L10 ng/L federal MCL (2024)2025-01-13 to 2025-10-16Not detected—
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)< 5 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)< 20 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)< 6 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorobutanoic acid (PFBA)< 5 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorobutanesulfonic acid (PFBS)< 3 ng/L2,000 ng/L EPA health advisory (screening, not a legal limit)2025-01-13 to 2025-10-16Not detected—
Perfluorodecanoic acid (PFDA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorododecanoic acid (PFDoA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluoroheptanoic acid (PFHpA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluoroheptanesulfonic acid (PFHpS)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorohexanoic acid (PFHxA)4.1 ng/L400,000 ng/L Michigan EGLE state MCL (strictest US state)2025-01-13 to 2025-10-16Below limitView evidence
Perfluorohexanesulfonic acid (PFHxS)< 3 ng/L10 ng/L federal MCL (2024)2025-01-13 to 2025-10-16Not detectedView evidence
Perfluoro-4-methoxybutanoic acid (PFMBA)< 3 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluoro-3-methoxypropanoic acid (PFMPA)< 4 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorononanoic acid (PFNA)< 4 ng/L10 ng/L federal MCL (2024)2025-01-13 to 2025-10-16Not detected—
Perfluorooctanoic acid (PFOA)6.5 ng/L4.0 ng/L federal MCL (2024)2025-01-13 to 2025-10-16Above guidelineView evidence
Perfluorooctanesulfonic acid (PFOS)5.1 ng/L4.0 ng/L federal MCL (2024)2025-01-13 to 2025-10-16Above guidelineView evidence
Perfluoropentanoic acid (PFPeA)5.9 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Detected, no limitView evidence
Perfluoropentanesulfonic acid (PFPeS)< 4 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorotetradecanoic acid (PFTA)< 8 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluorotridecanoic acid (PFTrDA)< 7 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Perfluoroundecanoic acid (PFUnA)< 2 ng/LNo federal or state limit; shown for transparency2025-01-13 to 2025-10-16Not detected—
Lithium< 9 µg/L10 µg/L EPA health reference level (screening, not a legal limit)2025-01-13 to 2025-10-16Not detected—
Lead (90th percentile)2 µg/L15 µg/L federal action level2025–2025 monitoring periodBelow limitView evidence
  • UCMR5 Analytical Results

    UCMR5 Analytical Results: DEDHAM WESTWOOD WATER DIST. (MA3073000)

    US EPA

    Published
    2026-01-15
    Newest sample
    2025-10-16
    Findings here
    30

    View source ↗Source record

  • State SDWIS Compliance Record

    Lead & Copper Rule 90th-percentile: DEDHAM WESTWOOD WATER DIST. (MA3073000)

    US EPA SDWIS

    Published
    2026-07-09
    Newest sample
    2025
    Findings here
    1

    View source ↗Source record

Dedham water reportAll water systemsCompare with another systemFilter guide (general)Water quality mapHow we analyze waterReport a correctionClaim this utility profile

Safe Home (EnviroTestKits)

Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb

  • Turnaround: 5 minutes

What it can't tell you: It shows a lead range, not an exact level, and tests nothing else unless you pay extra for the optional lab test.

Check price on Amazon
  • Lab-certified results

    ETR Labs Basic Water Quality Test Kit

    ETR Laboratories

    50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria

    • Analyzed by Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638
    • Turnaround: 2–4 business days after the lab receives it

    What it can't tell you: It does not test PFAS, and not every result on the panel falls under the lab's accredited scope.

    Check price on Amazon
  • When your results arrive, read them here →

    Commercial

    Certified for a concern found here

    Each card names which of this system’s findings its current certification covers, and which it doesn’t.

    As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.

    Under-Sink Filter

    Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (5)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    • Anyone who can't plumb, drill or hire an installer
    • Renters who can't modify plumbing
    See the evidenceCheck price on Amazon
    Under-Sink Filter

    Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (5)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    • Anyone who can't plumb, drill or hire an installer
    • Renters who can't modify plumbing
    See the evidenceCheck price on Amazon
    See all 13 products certified for a concern in this system →
    Countertop System

    Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Countertop System

    Patriot Pure Ultimate Water Filtration System

    • ✓PFOA: eligible, evidence match
  • ✓PFOS: eligible, evidence match
  • ✓Lead: eligible, evidence match
  • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
  • Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Countertop System

    AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Countertop System

    AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Under-Sink Filter

    Waterdrop G3P600 Tankless Reverse-Osmosis System

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (5)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    • Anyone who can't plumb, drill or hire an installer
    • Renters who can't modify plumbing
    See the evidenceCheck price on Amazon
    Under-Sink Filter

    Waterdrop G3P800 Tankless Reverse-Osmosis System

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (5)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    • Anyone who can't plumb, drill or hire an installer
    • Renters who can't modify plumbing
    See the evidenceCheck price on Amazon
    Refrigerator Filter

    Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)

    • ✓PFOA: eligible, evidence match
    • ✓PFOS: eligible, evidence match
    • ✓Lead: eligible, evidence match
    • –Not established: Perfluorohexanoic acid (PFHxA), Perfluoropentanoic acid (PFPeA)
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Water Pitcher

    Brita Elite Water Filter Pitcher

    • ✓Lead: eligible, evidence match
    • –Not established: PFOA, PFOS, Perfluorohexanoic acid (PFHxA) and 1 more
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Water Pitcher

    Culligan ZeroWater 10-Cup Pitcher (ZEROP10)

    • ✓Lead: eligible, evidence match
    • –Not established: PFOA, PFOS, Perfluorohexanoic acid (PFHxA) and 1 more
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Faucet Attachment

    PUR Plus Faucet Filter (FM2500V)

    • ✓Lead: eligible, evidence match
    • –Not established: PFOA, PFOS, Perfluorohexanoic acid (PFHxA) and 1 more
    Not suitable for (3)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    See the evidenceCheck price on Amazon
    Under-Sink Filter

    Frizzlife SP99 Under-Sink Filter

    • ✓Lead: eligible, evidence match
    • –Not established: PFOA, PFOS, Perfluorohexanoic acid (PFHxA) and 1 more
    Not suitable for (4)
    • Treating every tap in the home
    • A whole-home hard-water or scale problem
    • All PFAS: its evidence covers only the compounds it names
    • Anyone who can't plumb, drill or hire an installer
    See the evidenceCheck price on Amazon