No open health-based violations on EPA record in the last 10 years; latest legal-limit breach in the period starting October 2021.
Serves about 9,775 people (5,015 connections) with surface water bought from Danville City Water Works, So Anderson Water District and Harrodsburg Municipal Water Department.
From EPA's record for KY0840321. PurityMap is independent of North Mercer Water District.
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2 health-based violations in the last 10 years, from EPA's SDWIS compliance database.
| Period | Contaminant | Measured | Legal limit | EPA status |
|---|---|---|---|---|
| Oct–Dec 2021 | Total trihalomethanes (TTHM) | 0.081 mg/L | 0.080 mg/L | Resolved |
| From June 2020 | E. coli | – | – | Resolved |
EPA required this system to test for 30 unregulated and emerging contaminants, from January 2025 to October 2025.
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | 10.8 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoropentanoic acid (PFPeA) | 3.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| 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 | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-08 | UCMR5 Analytical Results: NORTH MERCER WATER DISTRICT (KY0840321) |
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 →North Mercer Water District's phone number on EPA record is 859-865-2292. Its mailing address is PO BOX 79, SALVISA, KY 40372.
According to EPA's record, North Mercer Water District uses surface water bought from Danville City Water Works, So Anderson Water District and Harrodsburg Municipal Water Department.
EPA's record shows 2 health-based violations for North Mercer 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 October 2021. 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 North Mercer Water District's latest lead and copper round, which ended in December 2024, was 4 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for North Mercer Water District. Its phone number on EPA record is 859-865-2292. Its mailing address on EPA record is PO BOX 79, SALVISA, KY 40372. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.