Short answer: In the 2025–2026 records we hold for Mansfield, two PFAS, PFOA and PFOS, each had a sample above a 2024 EPA limit (not a violation: the limits are judged on a yearly average, due 2029). Everything else measured is within its reference or not detected. 5 substances were detected and 26 were tested and not detected. The water is from Mansfield Water Division, serving 21,797 residents.
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier. Source: EPA SDWIS 2026Q2.
Groundwater
The treatment details are not on record.
Mains, then your building’s service line.
Plumbing inside the building is outside this record.
Two PFAS, PFOA and PFOS, each had a sample above a 2024 EPA limit (not a violation: the limits are judged on a yearly average, due 2029); everything else measured is within its reference or not detected.
6.2 ng/L, sampled 2025-03-31 to 2025-09-17. EPA UCMR 5.
4.0 ng/L federal MCL (2024): a legal limit. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. EPA health goal (MCLG): 0.
One EPA sample measured 6.2 ng/L, above the 4 ng/L limit EPA set in 2024. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation.
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58 (PFOA/PFOS)).
4.3 ng/L, sampled 2025-03-31 to 2025-09-17. EPA UCMR 5.
4.0 ng/L federal MCL (2024): a legal limit. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. EPA health goal (MCLG): 0.
One EPA sample measured 4.3 ng/L, above the 4 ng/L limit EPA set in 2024. That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation.
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58 (PFOA/PFOS)).
3.1 ng/L, sampled 2025-03-31 to 2025-09-17. EPA UCMR 5.
10 ng/L federal MCL (2024): a legal limit. That limit is judged on a yearly average, and water systems have until 2029 to meet it.
Detected at up to 3.1 ng/L (below the 10 ng/L limit EPA set in 2024). That limit is judged on a yearly average, and water systems have until 2029 to meet it.
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58, with PFHxS named on the listing).
1.9 µg/L, sampled 2026–2026 monitoring period (still open). EPA SDWIS (Lead & Copper Rule).
15 µg/L federal action level. EPA health goal (MCLG): 0.
The 90th-percentile tap result was 1.9 µg/L (below the 15 µg/L action level).
Usually from lead service lines, solder and fixtures inside buildings, after the water leaves treatment.
Test your own tap first. To reduce it: Lead-certified carbon filter, or reverse osmosis (NSF/ANSI 53 (lead)).
3.8 ng/L, sampled 2025-03-31 to 2025-09-17. EPA UCMR 5.
2,000 ng/L EPA health advisory (screening, not a legal limit).
Detected at up to 3.8 ng/L (below the 2,000 ng/L EPA health advisory; a screening level, not a legal limit).
Comes with the source water; home plumbing does not add it.
Test your own tap first. To reduce it: Reverse osmosis, or carbon certified for PFAS (NSF/ANSI 53 or 58, with PFBS named on the listing).
MANSFIELD WATER DIVISION (EPA PWSID MA4167000) delivers groundwater to 21,797 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
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.
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.
The record describes water leaving treatment and samples across the system. Pipes, solder and fixtures inside a building can add lead the record can’t see, especially in older buildings with lead service lines.
Test your waterMeasured in this report
Sampled across the system
Not in this record
Only a tap test measures it
Know what comes from your tap, starting with a first-draw lead sample.
Compare each result with its named reference in our test reader.
Choose a technology certified for what your test found.
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.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
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.
Screening: quick check, not lab-grade
Safe Home (EnviroTestKits)
Lead, read as one of three ranges: 0–4, 5–15 or 15+ ppb
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.
When your results arrive, read them here → · Compare every kit we list
Massachusetts Department of Environmental Protection certifies the labs that test drinking water in Massachusetts. Find a certified lab in Massachusetts ↗ · What lab tests cost →
| Finding | Reference type | Technology | Certification to check |
|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS)6.2 ng/L | Federal MCL | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58 (PFOA/PFOS) |
| Perfluorooctanoic acid (PFOA)4.3 ng/L | Federal MCL | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58 (PFOA/PFOS) |
| Perfluorohexanesulfonic acid (PFHxS)3.1 ng/L | Federal MCL | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFHxS named on the listing |
| Lead (90th percentile)1.9 µg/L | Action level | Lead-certified carbon filter, or reverse osmosis | NSF/ANSI 53 (lead) |
| Perfluorobutanesulfonic acid (PFBS)3.8 ng/L | Screening level | Reverse osmosis, or carbon certified for PFAS | NSF/ANSI 53 or 58, with PFBS named on the listing |
★ Best choice: Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200), certified for PFOA, PFOS and lead.
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| ★ Best choice | Under-sinkAquasana Claryum 2-Stage Under-Sink Filter (AQ-5200) | TreatsPFOA, PFOS and leadPrice$$ | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price on Amazon |
| Also good | Under-sinkAquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M) | TreatsPFOA, PFOS and leadPrice$$ | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price at Aquasana |
| Also good | CountertopAquasana Clean Water Machine Countertop Filter (AQ-CWM2) | TreatsPFOA, PFOS and leadPrice$$ | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price at Aquasana |
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| Also good | Reverse osmosisSmartFlow® Reverse Osmosis | TreatsPFOA, PFOS and leadTechnologyReverse osmosisPrice$$$ | Certified for PFOA and PFOS (NSF/ANSI 53 (includes P473), WQA) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price at Aquasana |
| Also good | Under-sinkWaterdrop G3P600 Tankless Reverse-Osmosis System | TreatsPFOA, PFOS and leadPrice$$$ | Certified for PFOA and PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price at Waterdrop |
| Also good | Under-sinkWaterdrop G3P800 Tankless Reverse-Osmosis System | TreatsPFOA, PFOS and leadPrice$$$ | Certified for PFOA and PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price at Waterdrop |
| Also good | CountertopAquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100) | TreatsPFOA, PFOS and leadPrice$$$ | Certified for PFOA and PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price on Amazon |
| Also good | CountertopAquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000) | TreatsPFOA, PFOS and leadPrice$$$ | Certified for PFOA and PFOS (NSF/ANSI 53, IAPMO) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price on Amazon |
| Also good | CountertopPatriot Pure Ultimate Water Filtration System | TreatsPFOA, PFOS and leadPrice$$ | Certified for PFOA and PFOS (NSF/ANSI 53, NSF, IAPMO) | Why it’s listed: its current certification names PFOA and PFOS, found in Mansfield’s record.See the evidence | Check price on Amazon |
| Also good | Reverse osmosisiSpring RCC7AK Alkaline Reverse Osmosis SystemUse code REFISPRING at checkout: 10% off your first iSpring order. | TechnologyReverse osmosisPrice$$ | Brand lab-tested for PFAS, not independently certified for PFOA, PFOS, Perfluorobutanesulfonic acid (PFBS) and PFHxS | See the evidence | Check price at iSpring |
| Also good | Reverse osmosisiSpring RO5004F Tankless Reverse Osmosis System with UVUse code REFISPRING at checkout: 10% off your first iSpring order. | TechnologyReverse osmosisPrice$$$ | Brand lab-tested for PFAS, not independently certified for PFOA, PFOS, Perfluorobutanesulfonic acid (PFBS) and PFHxS | See the evidence | Check price at iSpring |
| Also good | Reverse osmosisWaterdrop X12 Reverse Osmosis System | TechnologyReverse osmosisPrice$$$$ | Brand lab-tested for PFAS, not independently certified for PFOA, PFOS, Perfluorobutanesulfonic acid (PFBS) and PFHxS | See the evidence | Check price at Waterdrop |
★ Best choice: HealthShield™, certified for PFOA, PFOS and PFHxS.
| Pick | Product | Details and price | Certification | Why it’s listed | Link |
|---|---|---|---|---|---|
| ★ Best choice | Whole-houseHealthShield™ | TreatsPFOA, PFOS and PFHxSPrice$$$$ | Certified for PFOA, PFOS and PFHxS (NSF/ANSI 53, WQA) | Why it’s listed: its current certification names PFOA, PFOS and PFHxS, found in Mansfield’s record.See the evidence | Check price at Aquasana |
| $ Budget pick | Whole-houseiSpring WGB32B-PFKS PFAS & Heavy Metals Whole House FilterUse code REFISPRING at checkout: 10% off your first iSpring order. | Price$$$ | Brand lab-tested for PFAS, not independently certified for PFOA, PFOS, Perfluorobutanesulfonic acid (PFBS) and PFHxS | See the evidence | Check price at iSpring |
Also: lead picks →
PurityMap earns a commission from these links. "Best choice" and "Budget pick" go to certified products first; commission never decides them. As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Ask your utility first
Water utilities keep an inventory of service-line materials. Ask Mansfield Water Division whether your address is on it before you replace pipes.
Local help
Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
Older buildings may have lead service lines, solder or fixtures. Mansfield’s record shows lead at 1.9 µg/L (15 µg/L federal action level). Test first-draw water, then filter if needed.
4 of 29 PFAS tested were detected in Mansfield’s record (PFOS 6.2 ng/L, PFOA 4.3 ng/L and PFHxS 3.1 ng/L, and more); 2 above their limit. If PFAS matters to you, a filter certification names each compound it covers.
Most utilities keep chlorine or chloramine in the pipes. A carbon filter certified for taste and odor reduces either; your utility can tell you which it uses.
Your utility’s annual water quality report usually lists hardness; a test strip also measures it.
Reverse osmosis reduces many dissolved contaminants, including lead and minerals, at a single faucet, with some water sent to drain.
Get one email when Mansfield’s record changes.
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Mansfield, PFOS 6.2 ng/L and PFOA 4.3 ng/L were measured in one EPA sample each, above the 4 ng/L limit EPA set in 2024 (not a violation: the limits are judged on a yearly average, due 2029); the lead 90th-percentile result was 1.9 µg/L against the 15 µg/L action level. MANSFIELD WATER DIVISION (PWSID MA4167000) has a Purity Score of 65/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap. What we found →
MANSFIELD WATER DIVISION (PWS ID MA4167000) is the public water system on record for Mansfield, Massachusetts, serving about 21,797 people. Confirm the utility on your water bill before acting on a specific finding. Water utility →
Groundwater (primary source of record in EPA SDWIS). Water utility →
Yes. In EPA's UCMR 5 testing (2025-03-31 to 2025-09-17), PFOS was measured at 6.2 ng/L in one EPA sample, above the 4 ng/L limit EPA set in 2024 and PFOA was measured at 4.3 ng/L in one EPA sample, above the 4 ng/L limit EPA set in 2024. EPA's 2024 limits are judged on a yearly average, and water systems have until 2029 to meet them, so a single sample is not a violation. PFBS (3.8 ng/L, below the 2,000 ng/L EPA health advisory) and PFHxS (3.1 ng/L, below the 10 ng/L federal limit) were also detected. Reverse osmosis and filters certified to NSF/ANSI 53 for PFOA/PFOS reduce them at the tap. What we found →
MANSFIELD WATER DIVISION's most recent lead 90th-percentile result (2026) was 1.9 µg/L, below the 15 µg/L action level. That figure comes from sampled homes; lead usually enters from a building's own pipes and fixtures, so only a test at your tap tells you what you drink. Your household →
PurityMap's current record for Mansfield holds 31 findings: 2 above a reference, 3 detected within the reference and 26 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass. Records →
UCMR5 Analytical Results
UCMR5 Analytical Results: MANSFIELD WATER DIVISION (MA4167000)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: MANSFIELD WATER DIVISION (MA4167000)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
EPA SDWIS, EPA UCMR 5 and utility reports, each dated and linked.
Units converted to one basis; a non-detect kept distinct from zero.
Each result tagged by reference type: MCL, action level, screening level or aesthetic.
Every value sits against its own reference, never a blended one.
Measured subjects summarised at the water-system level; an open health-based violation caps the score.
Treatment is matched to what was found; a product is called certified only when its current certification names it.
What the Purity Score means: a summary of this water system’s published record, capped while a health-based violation is open. It is not a test of any tap. MANSFIELD WATER DIVISION · PWSID MA4167000 · Purity Score 65/100 (Fair) · Confidence: moderate · Assessed at the water-system level
Full methodology →Start with the hot-or-cold tap check. Where Mansfield Water Division reported something related, it's shown below.
Lead at Mansfield Water Division: 1.9 µg/L (90th percentile, 2026 monitoring period (still open)). Lead has no taste, so a taste neither shows nor rules it out.