Yarmouth Water Department
Published drinking-water records and contacts for Yarmouth Water Department. System MA4351000. Review sources and dates; not a real-time water assessment.
- System ID
- MA4351000
- State or territory
- MA
- Published population served
- 38900
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 899 — 2025-01-13 – 2025-07-29
- Lead and copper monitoring summaries: 16 — 1992-07-01 – 2025-06-30
- Massachusetts EEA PFAS monitoring results: 4173 — 2021-04-06 – 2026-07-29
Missing records here do not mean the provider did not test. Published records are not a real-time assessment of your tap water.
Published testing results
Selected recent records are shown below. Different sampling locations and dates are not interchangeable. These excerpts are not a complete testing history.
“<” means below the stated reporting limit, not zero. A reported measurement alone is not a safety verdict. Read an example
| Substance | Published result | Reporting limit | Sample date | Sampling location |
|---|---|---|---|---|
| 11Cl-PF3OUdS | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | Well 15 & 16 / 10028 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 6, 7 & 8 / 10027 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | Well 9 / 10023 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2025-07-29 | Well 9 / 10023 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 15 & 16 / 10028 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 15 & 16 / 10028 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | Well 9 / 10023 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2025-07-29 | GP Well 1M / 10010 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2025-07-29 | Well 15 & 16 / 10028 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2025-07-29 | Well 6, 7 & 8 / 10027 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2025-07-29 | Well 9 / 10023 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2025-07-29 | Well 21 & 22 / 10030 |
| PFPeA | 0.0041 µg/L | 0.003 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2025-07-29 | Well 4 & 5 / 10026 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2025-07-29 | Well 21 & 22 / 10030 |
| lithium | < 9 µg/L | 9 µg/L | 2025-07-29 | GP Well 1M / 10010 |
Download all EPA UCMR 5 records (CSV)
Lead and copper: 90th-percentile summaries
These describe a monitoring period across sampled locations, not the result at your home. How to read the 90th percentile
| Substance | Published 90th percentile | Monitoring period | Source quarter |
|---|---|---|---|
| Lead (PB90) | 0.0015 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.0048 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.0028 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0.001 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0.009 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0.011 mg/L | 2008-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0.004 mg/L | 2005-01-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| 11-CHLOROEICOSAFLUORO-3-OXAUNDECANE-1-SULFONIC ACID-11CL-PF3OUDS | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| N-METHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NMEFOSAA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUORODODECANOIC ACID - PFDOA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANOIC ACID - PFHXA | 38.1 ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| HEXAFLUOROPROPYLENE OXIDE DIMER ACID - HFPO-DA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| 4,8-DIOXA-3H-PERFLUORONONANOIC ACID - ADONA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| N-ETHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NETFOSAA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUOROOCTANOIC ACID-PFOA | 1.54 J ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEPTANOIC ACID-PFHPA | 9.99 ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUOROBUTANESULFONIC ACID-PFBS | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUORODECANOIC ACID - PFDA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
| PERFLUOROUNDECANOIC ACID - PFUNA | Below a limit; numeric threshold unavailable ng/L | 2026-07-29 | GP WELL # 20 HIGGINS CROWELL (20G) / Massachusetts EEA PFAS monitoring results |
State sampling points can include untreated water. Publisher qualifiers and units are retained; consult the full source notes before interpreting a record.
Download state records with source notes (CSV)
Published compliance history
22 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
| Rule / record | Period | Recorded status | Health-based (EPA classification) | Source quarter |
|---|---|---|---|---|
| Ground Water Rule / Monitoring, Source Water (GWR) | 2021-04-06 – — | Addressed | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2021-01-01 – 2021-03-31 | Archived | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2020-01-01 – 2020-03-31 | Archived | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2020-01-01 – 2020-03-31 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Notify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR) | 2018-02-02 – — | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Treatment Technique, Level 1 Assessment (RTCR) | 2018-02-01 – — | Resolved | Yes | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2007-10-01 – 2007-12-31 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Arsenic Rule / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 2006-04-01 – 2006-06-30 | Archived | No | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2003-09-01 – 2003-09-30 | Archived | Yes | 2026Q3 |
Source dates and refresh checks
A refresh check is not a sample date. Publication periods, sample dates and checks are shown separately.
- EPA SDWIS lead/copper summaries and service areas — source period: — – —; last checked: 2026-10-17
- EPA SDWIS contacts and compliance records — source period: — – —; last checked: 2026-10-17
- EPA UCMR 5 sample results — source period: 2023-01-03 – 2026-06-17; last checked: 2026-10-17
- Massachusetts EEA PFAS monitoring results — last successful check: 2026-10-12
Administrative contact (EPA filing)
Yarmouth Water Department: 5087717921
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.