No health-based violations on EPA record since 2016.
Serves about 12,735 people (3,028 connections) with groundwater from its own wells.
From EPA's record for MS0170010. PurityMap is independent of Horn Lake 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 January 2025 to July 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| 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 | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-27 to 2025-07-21 | UCMR5 Analytical Results: HORN LAKE WATER ASSOCIATION (MS0170010) |
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 →Horn Lake Water Association's phone number on EPA record is 662-393-0140. Its mailing address is P O BOX 151, HORN LAKE, MS 38637.
According to EPA's record, Horn Lake Water Association uses groundwater from its own wells.
No health-based violations on EPA record since 2016. EPA also lists 3 missed or late tests or reports in 10 years. The record comes from EPA's SDWIS compliance database.
Lead was not detected at the 90th percentile of tap samples in Horn Lake Water Association's latest lead and copper round, which ended in December 2024. The federal action level is 15 µg/L.
PurityMap has no verified website for Horn Lake Water Association. Its phone number on EPA record is 662-393-0140. Its mailing address on EPA record is P O BOX 151, HORN LAKE, MS 38637. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.