Williamsburg Water Dept
Published drinking-water records and contacts for Williamsburg Water Dept. System MA1340000. Review sources and dates; not a real-time water assessment.
- System ID
- MA1340000
- State or territory
- MA
- Published population served
- 1575
- System type (source code)
- CWS
Published records and dates
- Lead and copper monitoring summaries: 17 — 1993-07-01 – 2023-12-31
- Massachusetts EEA PFAS monitoring results: 180 — 2021-10-19 – 2024-04-24
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
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) | 0.001 mg/L | 2023-01-01 – 2023-12-31 | 2026Q3 |
| Lead (PB90) | 0.0012 mg/L | 2018-01-01 – 2020-12-31 | 2026Q3 |
| Lead (PB90) | 0.0085 mg/L | 2015-01-01 – 2017-12-31 | 2026Q3 |
| Lead (PB90) | 0.014 mg/L | 2012-01-01 – 2014-12-31 | 2026Q3 |
| Lead (PB90) | 0.00335 mg/L | 2011-01-01 – 2011-12-31 | 2026Q3 |
| Lead (PB90) | 0.0073 mg/L | 2010-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0.0038 mg/L | 2009-01-01 – 2009-12-31 | 2026Q3 |
| Lead (PB90) | 0.0044 mg/L | 2007-07-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| HEXAFLUOROPROPYLENE OXIDE DIMER ACID - HFPO-DA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| HEXAFLUOROPROPYLENE OXIDE DIMER ACID - HFPO-DA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROBUTANESULFONIC ACID-PFBS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| 11-CHLOROEICOSAFLUORO-3-OXAUNDECANE-1-SULFONIC ACID-11CL-PF3OUDS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| 9-CHLOROHEXADECAFLUORO-3-OXANONE-1-SULFONIC ACID-9CL-PF3ONS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| 4,8-DIOXA-3H-PERFLUORONONANOIC ACID - ADONA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROOCTANESULFONIC ACID-PFOS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| N-ETHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NETFOSAA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| 11-CHLOROEICOSAFLUORO-3-OXAUNDECANE-1-SULFONIC ACID-11CL-PF3OUDS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| N-METHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NMEFOSAA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUORONONANOIC ACID-PFNA | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANESULFONIC ACID-PFHXS | Below a limit; numeric threshold unavailable ng/L | 2024-04-24 | POINT OF ENTRY POST TREATMENT / 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
52 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 |
|---|---|---|---|---|
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2019-02-01 – 2019-02-28 | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2019-01-01 – 2019-01-31 | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2018-12-01 – 2018-12-31 | Resolved | No | 2026Q3 |
| Total Coliform Rule / Notification, State | 2018-11-28 – 2018-12-28 | Resolved | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2018-11-01 – 2018-11-30 | Resolved | No | 2026Q3 |
| Total Coliform Rule / Monitoring, Routine Minor (TCR) | 2015-07-01 – 2015-07-31 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2015-07-01 – 2015-09-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2015-07-01 – 2015-09-30 | Archived | No | 2026Q3 |
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2015-07-01 – 2015-09-30 | Archived | No | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2015-06-01 – 2015-06-30 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2014-10-01 – 2014-10-31 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2013-12-01 – 2013-12-31 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2013-11-01 – 2013-11-30 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2009-12-01 – 2009-12-31 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Maximum Contaminant Level Violation, Monthly (TCR) | 2009-10-01 – 2009-10-31 | Archived | Yes | 2026Q3 |
| Total Coliform Rule / Monitoring, Repeat Minor (TCR) | 2008-07-01 – 2008-07-31 | Archived | No | 2026Q3 |
| Lead and Copper Rule / Follow-up Or Routine LCR Tap M/R | 2008-01-01 – — | Addressed | No | 2026Q3 |
| Nitrate Rule / Monitoring, Regular | 2006-10-01 – 2006-12-31 | Archived | No | 2026Q3 |
| Volatile Organic Chemicals / Monitoring, Regular | 2001-04-01 – 2001-06-30 | Archived | No | 2026Q3 |
| Volatile Organic Chemicals / Monitoring, Regular | 2001-04-01 – 2001-06-30 | Archived | No | 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)
Williamsburg Water Dept: 4132688430
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.