No health-based violations on EPA record since 2016.
Serves about 9,253 people (3,847 connections) with surface water bought from Heber Springs Water System and Lonoke White Public Water Authority.
From EPA's record for AR0000454. PurityMap is independent of Mountain Top 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 March 2025 to September 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| 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 | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-03-12 to 2025-09-17 | UCMR5 Analytical Results: MOUNTAIN TOP WATER ASSOCIATION (AR0000454) |
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 →Mountain Top Water Association's phone number on EPA record is 501-362-5803. Its mailing address is 1200 HEBER SPRINGS RD SOUTH, HEBER SPRINGS, AR 72543.
According to EPA's record, Mountain Top Water Association uses surface water bought from Heber Springs Water System and Lonoke White Public Water Authority.
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 Mountain Top Water Association'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 Mountain Top Water Association. Its phone number on EPA record is 501-362-5803. Its mailing address on EPA record is 1200 HEBER SPRINGS RD SOUTH, HEBER SPRINGS, AR 72543. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.