PFOA
2.8× the limitPerfluorooctanoic acid
11ng/L
Each block = 4.0 ng/L federal MCL (2024)
EPA UCMR 5 · sampled 2024Evidence
Middleborough Water Supply serves 15,350 people from groundwater. 31 results are on 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); 3 more are detected with no federal limit, and everything else measured is within its reference or not detected.
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.
11ng/L
Each block = 4.0 ng/L federal MCL (2024)
5ng/L
Each block = 4.0 ng/L federal MCL (2024)
5,756service lines inventoried
From the utility's inventory reported to EPA (2026Q2). Look up your address with the utility.
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.
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.
Plumbing inside a home can add lead that the system record can't show. A tap test tells you what reaches your glass.
PFOA 11 ng/L in one EPA sample, above the 4 ng/L limit EPA set in 2024 (+7 more PFAS detected)
lead 3 µg/L, below the 15 µg/L action level
Understand water treatment technologies →
Understand:PFAS in MiddleboroughLead in Middleborough
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 (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.
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.
When your results arrive, read them here → · Compare every kit we list
★ Best choice: Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200), certified for PFOA, PFOS and lead.
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
| ★ Best choice | Aquasana Claryum 2-Stage Under-Sink Filter (AQ-5200) | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | $$ | Check price on Amazon |
| Also good | Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M) | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | $$ | Check price at Aquasana |
| Also good | Aquasana Clean Water Machine Countertop Filter (AQ-CWM2) | Certified for PFOA and PFOS (NSF/ANSI 53, WQA) | $$ | Check price at Aquasana |
★ Best choice: HealthShield™, certified for PFOA, PFOS, PFHxS and Perfluoroheptanoic acid (PFHpA).
| Pick | Product | Certification | Price | Link |
|---|---|---|---|---|
| ★ Best choice | HealthShield™ | Certified for PFOA, PFOS, PFHxS and Perfluoroheptanoic acid (PFHpA) (NSF/ANSI 53, WQA) | $$$$ | Check price at Aquasana |
| $ Budget pick | iSpring WGB32B-PFKS PFAS & Heavy Metals Whole House FilterUse code REFISPRING at checkout: 10% off your first iSpring order. | Brand lab-tested for PFAS, not independently certified for PFOA, PFOS, Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA), PFHxS, Perfluorobutanoic acid (PFBA), Perfluoroheptanoic acid (PFHpA) and Perfluoropentanoic acid (PFPeA) | $$$ | 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.
Lead service lines
MIDDLEBOROUGH WATER SUPPLY reported 7 lead service lines to replace in EPA’s inventory (2026Q2). Many utilities replace these lines for free or share the cost. Ask MIDDLEBOROUGH WATER SUPPLY whether your home’s line is on its list before you pay anyone.
Local help
Call to be connected with a local plumbing provider about lead service lines, repiping or fixture replacement.
MIDDLEBOROUGH WATER SUPPLY (PWS ID MA4182000) is a public water system serving 15,350 people in Middleborough, Massachusetts.
MIDDLEBOROUGH WATER SUPPLY is on record as drawing from groundwater. The source shapes which contaminants matter most for this system.
PurityMap's record for MIDDLEBOROUGH WATER SUPPLY holds 31 findings: 2 above a reference, 4 detected within the reference, 3 detected with no limit and 22 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.
PurityMap does not issue a safety verdict. It publishes MIDDLEBOROUGH WATER SUPPLY'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.
The latest published record for MIDDLEBOROUGH WATER SUPPLY is dated 2026-10-15. Utilities report on regulatory cycles, so results reflect the monitoring period rather than a live reading.
No. It is assessed at the water-system level from MIDDLEBOROUGH WATER SUPPLY'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.
Perfluorooctanoic acid (PFOA), Perfluorooctanesulfonic acid (PFOS), Perfluorohexanesulfonic acid (PFHxS), Lead (90th percentile), Perfluorobutanesulfonic acid (PFBS), Perfluorohexanoic acid (PFHxA), Perfluorobutanoic acid (PFBA), Perfluoroheptanoic acid (PFHpA) and Perfluoropentanoic acid (PFPeA) were detected in this record. Each finding shows its measured value, its reference and its source on this page.
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.
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 Middleborough Water Supply
One email when a new sampling round is published, a result moves above or below its reference, or the system's score changes.
Follow this water →As listed for this system in EPA's records. Your water bill names your supplier.
| Substance | Result | Reference | Sampled | Status | Evidence |
|---|---|---|---|---|---|
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | 2024-12-10 to 2025-06-02 | Not detected | — |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorobutanoic acid (PFBA) | 5 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Detected, no limit | View evidence |
| Perfluorobutanesulfonic acid (PFBS) | 5 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit) | 2024-12-10 to 2025-06-02 | Below limit | View evidence |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluoroheptanoic acid (PFHpA) | 4 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Detected, no limit | View evidence |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorohexanoic acid (PFHxA) | 10 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | 2024-12-10 to 2025-06-02 | Below limit | View evidence |
| Perfluorohexanesulfonic acid (PFHxS) | 3 ng/L | 10 ng/L federal MCL (2024) | 2024-12-10 to 2025-06-02 | Below limit | View evidence |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorooctanoic acid (PFOA) | 11 ng/L | 4.0 ng/L federal MCL (2024) | 2024-12-10 to 2025-06-02 | Above guideline | View evidence |
| Perfluorooctanesulfonic acid (PFOS) | 5 ng/L | 4.0 ng/L federal MCL (2024) | 2024-12-10 to 2025-06-02 | Above guideline | View evidence |
| Perfluoropentanoic acid (PFPeA) | 13 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Detected, no limit | View evidence |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | 2024-12-10 to 2025-06-02 | Not detected | — |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit) | 2024-12-10 to 2025-06-02 | Not detected | — |
| Lead (90th percentile) | 3 µg/L | 15 µg/L federal action level | 2025–2025 monitoring period | Below limit | View evidence |
UCMR5 Analytical Results
UCMR5 Analytical Results: MIDDLEBOROUGH WATER SUPPLY (MA4182000)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: MIDDLEBOROUGH WATER SUPPLY (MA4182000)
US EPA SDWIS