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  1. PurityMap
  2. Water Quality
  3. Connecticut
  4. BRISTOL WATER DEPARTMENTCT0170011
Change
Updated 2026-09-16
Water system record · CT0170011

Bristol Water Department

Bristol Water Department serves 52,079 people from surface water. 31 results are on record. PFOA is above its federal limit (a 2024 limit 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 78 is builtCT0170011 · 52,079 served
78/100 · GoodConfidence: moderate
above a federal limit
1
detected, within reference or no limit
1
not detected
29
  • PFAS (forever chemicals)49
  • Metals & lead100
  • Disinfection by-products—Not monitored
  • Track record (violations)100

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
52,079
as reported to EPA
Type
Community Water System
Connecticut
Cities
1
Bristol
Records
31 results
latest 2026
FindingsAll resultsComplianceWhat you can doProductsRecordsFAQ
What stands out

One PFAS above the 2024 federal limit

The 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× the limit

4.1ng/L

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

EPA UCMR 5 · sampled 2023Evidence

Coverage by group

31 results on record
  • PFAS (forever chemicals)
    1 above · 1 detected · 27 not detected
  • Metals & lead
    1 not detected
  • Disinfection by-products
    Not monitored
  • Other
    1 not detected
  • Above a limit or reference
  • Detected
  • Not detected
  • Not monitored
Every detected result

2 detected results

  • PFOA
    Perfluorooctanoic acid (PFOA)EPA UCMR 5 · 2023
    4.0 ng/L federal MCL (2024)
    4.1ng/L
    Above limit
  • PFPeA
    Perfluoropentanoic acid (PFPeA)EPA UCMR 5 · 2023
    No federal or state limit; shown for transparency
    3.1ng/L
    Detected · no limit
29 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
  • PFHxA
  • PFHxS
  • PFMBA
  • PFMPA
  • PFNA
  • PFOS
  • PFPeS
  • PFTA
  • PFTrDA
  • PFUnA
  • Lithium
  • Lead (90th percentile)

Compliance and coverage

Lead service lines

17,286service lines inventoried

  • Lead0
  • Galvanized, to replace0
  • Material unknown0
  • Not lead17,286

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

Compliance

0health-based violations in the last 10 years

From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.

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

    A tap test can confirm levels at your home before you choose treatment.

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

    PFOA 4.1 ng/L, above the 4 ng/L limit (+1 more PFAS detected)

    NSF/ANSI 58 or 53, with PFOA/PFPeA named on the listing
    Treatment for PFAS →

Understand water treatment technologies →

Understand:PFAS in Bristol

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
  • –Not established: 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
  • –Not established: 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 9 products certified for a concern in this system →
Countertop System

Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)

  • ✓PFOA: eligible, evidence match
  • –Not established: 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
  • –Not established: 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
  • –Not established: 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
  • –Not established: 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
  • –Not established: 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
  • –Not established: 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
  • –Not established: 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
Questions

Frequently asked questions

Who does BRISTOL WATER DEPARTMENT serve?

BRISTOL WATER DEPARTMENT (PWS ID CT0170011) is a public water system serving 52,079 people in Bristol, Connecticut.

Where does BRISTOL WATER DEPARTMENT get its water?

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

What does BRISTOL WATER DEPARTMENT's monitoring record show?

PurityMap's record for BRISTOL WATER DEPARTMENT holds 31 findings: 1 above a reference, 1 detected with no limit and 29 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 BRISTOL WATER DEPARTMENT's water safe to drink?

PurityMap does not issue a safety verdict. It publishes BRISTOL WATER DEPARTMENT'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 BRISTOL WATER DEPARTMENT data?

The latest published record for BRISTOL WATER DEPARTMENT 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 BRISTOL WATER DEPARTMENT'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 BRISTOL WATER DEPARTMENT?

Perfluorooctanoic acid (PFOA) 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 BRISTOL WATER DEPARTMENT'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.

Follow this water

Follow Bristol Water Department

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
  • Bristol

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 transparency2023-09-20 to 2024-06-06Not detected—
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)< 5 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)< 5 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)< 2 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)< 5 ng/L10 ng/L federal MCL (2024)2023-09-20 to 2024-06-06Not detected—
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)< 5 ng/LNo federal or state limit; shown for transparency2023-11-06 to 2024-06-06Not detected—
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)< 20 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)< 6 ng/LNo federal or state limit; shown for transparency2023-11-06 to 2024-06-06Not detected—
Perfluorobutanoic acid (PFBA)< 5 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluorobutanesulfonic acid (PFBS)< 3 ng/L2,000 ng/L EPA health advisory (screening, not a legal limit)2023-09-20 to 2024-06-06Not detected—
Perfluorodecanoic acid (PFDA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluorododecanoic acid (PFDoA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluoroheptanoic acid (PFHpA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluoroheptanesulfonic acid (PFHpS)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluorohexanoic acid (PFHxA)< 3 ng/L400,000 ng/L Michigan EGLE state MCL (strictest US state)2023-09-20 to 2024-06-06Not detected—
Perfluorohexanesulfonic acid (PFHxS)< 3 ng/L10 ng/L federal MCL (2024)2023-09-20 to 2024-06-06Not detectedView evidence
Perfluoro-4-methoxybutanoic acid (PFMBA)< 3 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluoro-3-methoxypropanoic acid (PFMPA)< 4 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluorononanoic acid (PFNA)< 4 ng/L10 ng/L federal MCL (2024)2023-09-20 to 2024-06-06Not detected—
Perfluorooctanoic acid (PFOA)4.1 ng/L4.0 ng/L federal MCL (2024)2023-09-20 to 2024-06-06Above guidelineView evidence
Perfluorooctanesulfonic acid (PFOS)< 4 ng/L4.0 ng/L federal MCL (2024)2023-09-20 to 2024-06-06Not detectedView evidence
Perfluoropentanoic acid (PFPeA)3.1 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Detected, no limitView evidence
Perfluoropentanesulfonic acid (PFPeS)< 4 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Perfluorotetradecanoic acid (PFTA)< 8 ng/LNo federal or state limit; shown for transparency2023-11-06 to 2024-06-06Not detected—
Perfluorotridecanoic acid (PFTrDA)< 7 ng/LNo federal or state limit; shown for transparency2023-11-06 to 2024-06-06Not detected—
Perfluoroundecanoic acid (PFUnA)< 2 ng/LNo federal or state limit; shown for transparency2023-09-20 to 2024-06-06Not detected—
Lithium< 9 µg/L10 µg/L EPA health reference level (screening, not a legal limit)2023-09-20 to 2024-06-06Not detected—
Lead (90th percentile)Non-Detect (ND)15 µg/L federal action level2026–2026 monitoring period (still open)Not detectedView evidence
  • UCMR5 Analytical Results

    UCMR5 Analytical Results: BRISTOL WATER DEPARTMENT (CT0170011)

    US EPA

    Published
    2026-01-15
    Newest sample
    2024-06-06
    Findings here
    30

    View source ↗Source record

  • State SDWIS Compliance Record

    Lead & Copper Rule 90th-percentile: BRISTOL WATER DEPARTMENT (CT0170011)

    US EPA SDWIS

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

    View source ↗Source record

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