No health-based violations on EPA record since 2016.
Serves about 5,188 people (2,359 connections) with surface water bought from Community Water System and Mountain View Waterworks.
From EPA's record for AR0000735. PurityMap is independent of West Stone County Water Assn.
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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 2025 to August 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorobutanoic acid (PFBA) | 7.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| 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 | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-02-24 to 2025-08-20 | UCMR5 Analytical Results: WEST STONE COUNTY WATER ASSN (AR0000735) |
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 →West Stone County Water Assn's phone number on EPA record is 870-363-4800. Its mailing address is P.O. BOX 126, FOX, AR 72051.
According to EPA's record, West Stone County Water Assn uses surface water bought from Community Water System and Mountain View Waterworks.
No health-based violations on EPA record since 2016. EPA also lists 2 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
The 90th-percentile lead result in West Stone County Water Assn's latest lead and copper round, which ended in December 2025, was 1 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for West Stone County Water Assn. Its phone number on EPA record is 870-363-4800. Its mailing address on EPA record is P.O. BOX 126, FOX, AR 72051. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.