No health-based violations on EPA record since 2016.
Serves about 7,710 people (3,109 connections) with groundwater from its own wells.
From EPA's record for OH4202012. PurityMap is independent of Knox County Water and Wastewater PWS.
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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 2023 to September 2023.
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| 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 | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-03-14 to 2023-09-19 | UCMR5 Analytical Results: KNOX COUNTY WATER AND WASTEWATER PWS (OH4202012) |
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 →Knox County Water and Wastewater PWS's phone number on EPA record is 740-397-7041. Its mailing address is 17602 COSHOCTON RD, MOUNT VERNON, OH 43050.
According to EPA's record, Knox County Water and Wastewater PWS 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.
The 90th-percentile lead result in Knox County Water and Wastewater PWS's latest lead and copper round, which ended in December 2025, was 2.09 µg/L, below the federal action level of 15 µg/L.
PurityMap has no verified website for Knox County Water and Wastewater PWS. Its phone number on EPA record is 740-397-7041. Its mailing address on EPA record is 17602 COSHOCTON RD, MOUNT VERNON, OH 43050. Your water bill lists the ways to contact your supplier and pay. PurityMap does not take payments.