Hopkinton Water Department
Published drinking-water records and contacts for Hopkinton Water Department. System MA2139000. Review sources and dates; not a real-time water assessment.
- System ID
- MA2139000
- State or territory
- MA
- Published population served
- 12680
- System type (source code)
- CWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 210 — 2025-02-11 – 2025-08-18
- Lead and copper monitoring summaries: 16 — 1992-07-01 – 2025-06-30
- Massachusetts EEA PFAS monitoring results: 7734 — 2021-07-28 – 2026-09-03
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 | 2025-08-18 | Well 6 Blending / MULT2 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFBA | 0.0062 µg/L | 0.005 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFBS | 0.0038 µg/L | 0.003 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2025-08-18 | Well 6 Blending / MULT2 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2025-08-18 | GP WELL 4 / 04G |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2025-08-18 | ALPRILLA Blending / MULT1 |
| lithium | < 9 µg/L | 9 µg/L | 2025-08-18 | GP WELL 4 / 04G |
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) | 0.0074 mg/L | 2025-01-01 – 2025-06-30 | 2026Q3 |
| Lead (PB90) | 0.0058 mg/L | 2022-01-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.009 mg/L | 2024-07-01 – 2024-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2019-01-01 – 2021-12-31 | 2026Q3 |
| Lead (PB90) | 0.005 mg/L | 2016-01-01 – 2018-12-31 | 2026Q3 |
| Lead (PB90) | 0.008 mg/L | 2013-01-01 – 2015-12-31 | 2026Q3 |
| Lead (PB90) | 0.007 mg/L | 2010-01-01 – 2012-12-31 | 2026Q3 |
| Lead (PB90) | 0.004 mg/L | 2007-01-01 – 2009-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| PERFLUOROUNDECANOIC ACID - PFUNA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN EFFLUENT SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROOCTANOIC ACID-PFOA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN EFFLUENT SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUORONONANOIC ACID-PFNA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN EFFLUENT SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROBUTANESULFONIC ACID-PFBS | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN EFFLUENT SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUORONONANOIC ACID-PFNA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN VESSEL 25% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROTRIDECANOIC ACID - PFTRDA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN VESSEL 25% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROUNDECANOIC ACID - PFUNA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 PFAS RESIN VESSEL 25% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANOIC ACID - PFHXA | 13.1 ng/L | 2026-09-03 | WELL 6 PFAS RESIN VESSEL 25% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| N-METHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NMEFOSAA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 CARBON VESSEL 50% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANOIC ACID - PFHXA | 17.8 ng/L | 2026-09-03 | WELL 6 CARBON VESSEL 50% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUORODODECANOIC ACID - PFDOA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 CARBON VESSEL 50% SAMPLE TAP / Massachusetts EEA PFAS monitoring results |
| PERFLUOROTRIDECANOIC ACID - PFTRDA | Below a limit; numeric threshold unavailable ng/L | 2026-09-03 | WELL 6 CARBON VESSEL 25% SAMPLE TAP / 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
0 imported records. Status is as recorded in the source; historical records are not current advisories. Missing records do not establish that no violations occurred.
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)
Hopkinton Water Department: 5084979740
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.