No health-based violations on EPA record since 2016.
Serves about 8,000 people (3,200 connections) with groundwater from its own wells.
From EPA's record for ME0091670. PurityMap is independent of Yarmouth Water District.
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No health-based violations in the last 10 years, from EPA's SDWIS compliance database.
EPA required this system to test for 30 unregulated and emerging contaminants, from April 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) | 9.2 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorohexanoic acid (PFHxA) | 9.8 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorobutanoic acid (PFBA) | 6.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoroheptanoic acid (PFHpA) | 4.5 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoropentanoic acid (PFPeA) | 8.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Lithium | < 9 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-15 to 2025-10-07 | UCMR5 Analytical Results: YARMOUTH WATER DISTRICT (ME0091670) |
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
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Screening: quick check, not lab-grade
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.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
Environmental Testing and Research Laboratories (ETR Labs), Leominster, MA · ISO/IEC 17025:2017, ANAB certificate AT-2638 · 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.
Get PurityMap updates about this water system.
Follow this water →Yarmouth Water District's phone number on EPA record is 207-846-5821. Its mailing address is 181 SLIGO ROAD, YARMOUTH, ME 04096.
According to EPA's record, Yarmouth Water District uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Yarmouth Water District's latest lead and copper round, which ended in December 2025, was 9.52 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Yarmouth Water District. Its phone number on EPA record is 207-846-5821. Its mailing address on EPA record is 181 SLIGO ROAD, YARMOUTH, ME 04096. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.