No health-based violations on EPA record since 2016.
Serves about 7,364 people (3,473 connections) with groundwater from its own wells.
From EPA's record for AR0000319. PurityMap is independent of Yorktown Water Association.
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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 April 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Lithium | 15 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| 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 | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-04-07 to 2025-10-01 | UCMR5 Analytical Results: YORKTOWN WATER ASSOCIATION (AR0000319) |
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 →Yorktown Water Association's phone number on EPA record is 870-268-4000. Its mailing address is P.O. BOX 277, STAR CITY, AR 71667.
According to EPA's record, Yorktown Water Association 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 Yorktown Water Association's latest lead and copper round, which ended in December 2025, was 2 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Yorktown Water Association. Its phone number on EPA record is 870-268-4000. Its mailing address on EPA record is P.O. BOX 277, STAR CITY, AR 71667. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.