No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting April 2025.
Serves about 6,744 people (2,824 connections) with surface water bought from Barkley Lake Water District, Crittenden-Livingston Co Water District, Princeton Water & Sewer Commission and 3 more.
From EPA's record for KY0720933. PurityMap is independent of Lyon County Water District.
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10 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Apr–Jun 2025 | Haloacetic acids (HAA5) | 0.064 mg/L | 0.060 mg/L | Resolved |
| Jan–Mar 2025 | Haloacetic acids (HAA5) | 0.065 mg/L | 0.060 mg/L | Resolved |
| Oct–Dec 2024 | Total trihalomethanes (TTHM) | 0.092 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2024 | Haloacetic acids (HAA5) | 0.072 mg/L | 0.060 mg/L | Resolved |
| Jul–Sep 2024 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2017 | Total trihalomethanes (TTHM) | 0.085 mg/L | 0.080 mg/L | Resolved |
| Jul–Sep 2017 | Total trihalomethanes (TTHM) | 0.088 mg/L | 0.080 mg/L | Resolved |
| Apr–Jun 2017 | Total trihalomethanes (TTHM) | 0.09 mg/L | 0.080 mg/L | Resolved |
| Jan–Mar 2017 | Total trihalomethanes (TTHM) | 0.092 mg/L | 0.080 mg/L | Resolved |
| Oct–Dec 2016 | Total trihalomethanes (TTHM) | 0.083 mg/L | 0.080 mg/L | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from February 2023 to August 2024.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorooctanesulfonic acid (PFOS) | 4.4 ng/L | 4.0 ng/L federal MCL (2024) | Above a historical reference; current applicability unverified | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorobutanoic acid (PFBA) | 51.2 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2023-11-08 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2023-11-08 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2023-11-08 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| 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 | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2023-11-08 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2023-11-08 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-02-14 to 2024-08-14 | UCMR5 Analytical Results: LYON COUNTY WATER DISTRICT (KY0720933) |
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 →Lyon County Water District's phone number on EPA record is 270-388-0271. Its mailing address is PO BOX 489, KUTTAWA, KY 42055.
According to EPA's record, Lyon County Water District uses surface water bought from Barkley Lake Water District, Crittenden-Livingston Co Water District, Princeton Water & Sewer Commission and 3 more.
EPA's record shows 10 health-based violations for Lyon County Water District in the 10 years to July 9, 2026. No open health-based violations on EPA record in the last 10 years. The latest legal-limit breach on record was in the period starting April 2025. 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 Lyon County Water District'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 Lyon County Water District. Its phone number on EPA record is 270-388-0271. Its mailing address on EPA record is PO BOX 489, KUTTAWA, KY 42055. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.