No health-based violations on EPA record since 2016.
Serves about 9,821 people (5,250 connections) with groundwater from its own wells.
From EPA's record for IA5131033. PurityMap is independent of Fairfield Water Supply.
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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 February 2023 to August 2023.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 199 µg/L | 10 µg/L EPA health reference level (screening, not a legal limit)Screening level, not a legal limit | Above the referenced health-based guidance value | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| 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 | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-15 to 2023-08-14 | UCMR5 Analytical Results: FAIRFIELD WATER SUPPLY (IA5131033) |
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 →Fairfield Water Supply's phone number on EPA record is 641-472-5713. Its mailing address is ATTN JEFF DUNBAR, 118 S MAIN PO BOX 220, FAIRFIELD, IA 52556.
According to EPA's record, Fairfield Water Supply 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.
Lead was not detected at the 90th percentile of tap samples in Fairfield Water Supply's latest lead and copper round, which ended in December 2025. The federal action level is 15 µg/L.
PurityMap has no verified website for Fairfield Water Supply. Its phone number on EPA record is 641-472-5713. Its mailing address on EPA record is ATTN JEFF DUNBAR, 118 S MAIN PO BOX 220, FAIRFIELD, IA 52556. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.