No health-based violations on EPA record since 2016.
Serves about 9,055 people (3,068 connections) with groundwater from its own wells.
From EPA's record for MA2187000. PurityMap is independent of Millis Water Dept.
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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 May 2023 to January 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 7.3 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorooctanoic acid (PFOA) | 6.9 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorobutanesulfonic acid (PFBS) | 9.1 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorohexanoic acid (PFHxA) | 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoropentanoic acid (PFPeA) | 3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| 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 | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-05-02 to 2024-01-22 | UCMR5 Analytical Results: MILLIS WATER DEPT (MA2187000) |
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 →Millis Water Dept's phone number on EPA record is 5083765424. Its mailing address is C/O MILLIS WATER DEPARTMENT, 900 MAIN STREET, ROOM 201, MILLIS, MA 02054.
According to EPA's record, Millis Water Dept uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 1 missed or late test or report in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Millis Water Dept's latest lead and copper round, which ended in December 2025, was 1.5 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Millis Water Dept. Its phone number on EPA record is 5083765424. Its mailing address on EPA record is C/O MILLIS WATER DEPARTMENT, 900 MAIN STREET, ROOM 201, MILLIS, MA 02054. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.