Mt Greylock Regional School
Published drinking-water records and contacts for Mt Greylock Regional School. System MA1341010. Review sources and dates; not a real-time water assessment.
- System ID
- MA1341010
- State or territory
- MA
- Published population served
- 930
- System type (source code)
- NTNCWS
Published records and dates
- PFAS / lithium (EPA UCMR 5): 60 — 2023-04-04 – 2023-10-03
- Lead and copper monitoring summaries: 17 — 1993-07-01 – 2025-12-31
- Massachusetts EEA PFAS monitoring results: 126 — 2021-01-06 – 2024-04-16
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 | 2023-10-03 | WELL #3 / 10003 |
| 4:2 FTS | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| 6:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-10-03 | WELL #3 / 10003 |
| 8:2 FTS | < 0.005 µg/L | 0.005 µg/L | 2023-10-03 | WELL #3 / 10003 |
| 9Cl-PF3ONS | < 0.002 µg/L | 0.002 µg/L | 2023-10-03 | WELL #3 / 10003 |
| ADONA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| HFPO-DA | < 0.005 µg/L | 0.005 µg/L | 2023-10-03 | WELL #3 / 10003 |
| NEtFOSAA | < 0.005 µg/L | 0.005 µg/L | 2023-10-03 | WELL #3 / 10003 |
| NFDHA | < 0.02 µg/L | 0.02 µg/L | 2023-10-03 | WELL #3 / 10003 |
| NMeFOSAA | < 0.006 µg/L | 0.006 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFBA | < 0.005 µg/L | 0.005 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFBS | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFDA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFDoA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFEESA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFHpA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFHpS | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFHxA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFHxS | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFMBA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFMPA | < 0.004 µg/L | 0.004 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFNA | < 0.004 µg/L | 0.004 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFOA | < 0.004 µg/L | 0.004 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFOS | < 0.004 µg/L | 0.004 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFPeA | < 0.003 µg/L | 0.003 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFPeS | < 0.004 µg/L | 0.004 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFTA | < 0.008 µg/L | 0.008 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFTrDA | < 0.007 µg/L | 0.007 µg/L | 2023-10-03 | WELL #3 / 10003 |
| PFUnA | < 0.002 µg/L | 0.002 µg/L | 2023-10-03 | WELL #3 / 10003 |
| lithium | < 9 µg/L | 9 µg/L | 2023-10-03 | WELL #3 / 10003 |
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) | 0.00021 mg/L | 2023-01-01 – 2025-12-31 | 2026Q3 |
| Lead (PB90) | 0.0077 mg/L | 2020-01-01 – 2022-12-31 | 2026Q3 |
| Lead (PB90) | 0 mg/L | 2017-01-01 – 2019-12-31 | 2026Q3 |
| Lead (PB90) | 0.0031 mg/L | 2014-01-01 – 2016-12-31 | 2026Q3 |
| Lead (PB90) | 0.0053 mg/L | 2011-01-01 – 2013-12-31 | 2026Q3 |
| Lead (PB90) | 0.001 mg/L | 2010-01-01 – 2010-12-31 | 2026Q3 |
| Lead (PB90) | 0.0011 mg/L | 2007-07-01 – 2007-12-31 | 2026Q3 |
| Lead (PB90) | 0.0045 mg/L | 2007-07-01 – 2007-12-31 | 2026Q3 |
| Substance | Published result | Sample date | Location / source |
|---|---|---|---|
| PERFLUOROHEPTANOIC ACID-PFHPA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROBUTANESULFONIC ACID-PFBS | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROUNDECANOIC ACID - PFUNA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | 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 | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROTETRADECANOIC ACID - PFTA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| HEXAFLUOROPROPYLENE OXIDE DIMER ACID - HFPO-DA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| N-METHYL PERFLUOROOCTANESULFONAMIDOACETIC ACID - NMEFOSAA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUORODECANOIC ACID - PFDA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | 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 | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUORODODECANOIC ACID - PFDOA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROHEXANESULFONIC ACID-PFHXS | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | POINT OF ENTRY POST TREATMENT / Massachusetts EEA PFAS monitoring results |
| PERFLUOROTRIDECANOIC ACID - PFTRDA | Below a limit; numeric threshold unavailable ng/L | 2024-04-16 | 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
14 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 |
|---|---|---|---|---|
| Radionuclides and Revised Rad Rule / Monitoring, Regular | 2019-10-01 – 2019-12-31 | Archived | No | 2026Q3 |
| Revised Total Coliform Rule / Monitoring, Routine (RTCR) | 2018-07-01 – 2018-07-31 | Resolved | No | 2026Q3 |
| Arsenic Rule / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | Archived | No | 2026Q3 |
| Inorganic Chemicals / Monitoring, Regular | 1995-04-10 – 1995-06-30 | 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)
Mt. Greylock Regional School District: 4134589582
An administrative filing contact may not be a customer-service line. Confirm current contact details with the provider.