No health-based violations on EPA record since 2016.
Serves about 8,479 people (3,406 connections) with groundwater from its own wells, and buys water from Devens Massdevelopment.
From EPA's record for MA2019000. PurityMap is independent of Ayer DPW Water Division.
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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 February 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanoic acid (PFHxA) | 5.2 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2023-05-02 to 2024-02-12 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorobutanoic acid (PFBA) | 19.9 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-05-02 to 2024-02-12 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluoropentanoic acid (PFPeA) | 13.1 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-05-02 to 2024-02-12 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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: AYER DPW WATER DIVISION (MA2019000) |
| 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: AYER DPW WATER DIVISION (MA2019000) |
| 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: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| 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 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorobutanesulfonic acid (PFBS) | < 3 ng/L | 2,000 ng/L EPA health advisory (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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorodecanoic acid (PFDA) | < 3 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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorododecanoic acid (PFDoA) | < 3 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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluoroheptanoic acid (PFHpA) | < 3 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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-05-02 to 2023-11-07 | UCMR5 Analytical Results: AYER DPW WATER DIVISION (MA2019000) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 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: AYER DPW WATER DIVISION (MA2019000) |
| 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: AYER DPW WATER DIVISION (MA2019000) |
| 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: AYER DPW WATER DIVISION (MA2019000) |
| Perfluoroundecanoic acid (PFUnA) | < 2 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: AYER DPW WATER DIVISION (MA2019000) |
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 →Ayer DPW Water Division's phone number on EPA record is 9787728240. Its mailing address is 25 BROOK STREET, AYER, MA 01432.
According to EPA's record, Ayer DPW Water Division uses groundwater from its own wells, and buys water from Devens Massdevelopment.
No health-based violations on EPA record since 2016. EPA also lists 5 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in Ayer DPW Water Division's latest lead and copper round, which ended in December 2025, was 2.8 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Ayer DPW Water Division. Its phone number on EPA record is 9787728240. Its mailing address on EPA record is 25 BROOK STREET, AYER, MA 01432. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.