No health-based violations on EPA record since 2016.
Serves about 5,000 people (56 connections) with surface water bought from Glasgow Water Company and Green River Valley Water District.
From EPA's record for KY0310940. PurityMap is independent of Mammoth Cave/Central System.
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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 October 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 | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| 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 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2025-01-08 to 2025-10-06 | UCMR5 Analytical Results: MAMMOTH CAVE/CENTRAL SYSTEM (KY0310940) |
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 →Mammoth Cave/Central System's phone number on EPA record is 270-261-1515. Its mailing address is PO BOX 426, CAVE CITY, KY 42127.
According to EPA's record, Mammoth Cave/Central System uses surface water bought from Glasgow Water Company and Green River Valley Water District.
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 Mammoth Cave/Central System's latest lead and copper round, which ended in December 2023, was 11 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Mammoth Cave/Central System. Its phone number on EPA record is 270-261-1515. Its mailing address on EPA record is PO BOX 426, CAVE CITY, KY 42127. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.