Short answer: No measured result is above a legal limit. Vernon Hills serves 33,207 residents.
EPA lists this system for the city. Your water bill or annual water quality report names your actual supplier.
Source: EPA SDWIS 2026Q2.
Also supplies: Indian Creek
VERNON HILLS - LAKE CO PW (EPA PWSID IL0971750) delivers surface water to 33,207 residents. This report reflects 29 individual PFAS result(s) from the source UCMR5 observations and the latest Lead & Copper Rule 90th-percentile result. Water hardness and disinfectant type are pending the utility's own annual report.
0health-based violations in the last 10 years
From EPA SDWIS. A clean violation history means no enforcement action was recorded; it does not cover contaminants without a limit.
No result is not a pass. Your utility's annual water quality report may list them, and a certified lab test covers your own tap.
The records describe the system. A certified lab test shows what reaches your glass.
Screening tells you if something is worth a closer look; a lab result is the number you can act on.
As an Amazon Associate, PurityMap earns from qualifying purchases. Affiliate disclosure.
Screening: quick check, not lab-grade
Silver Lake Research
Lead, bacteria, nitrate, copper, iron, chlorine, hardness and pH
What it can't tell you: Each test gives a yes/no or a rough range, not a lab number, and it cannot detect PFAS or arsenic.
Lab-certified results
ETR Laboratories
50+ substances, including lead, copper, arsenic, nitrate, hardness and coliform bacteria
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.
When your results arrive, read them here →
PurityMap does not give a safe/unsafe verdict; it shows what the public records measured. For Vernon Hills, no regulated PFAS were detected in EPA's 2024 testing. VERNON HILLS - LAKE CO PW (PWSID IL0971750) has a Purity Score of 100/100 (confidence: moderate), assessed at the water-system level and computed only from contaminants that were measured. Water can change in your own pipes, so a certified test is the only way to know what comes out of your tap.
VERNON HILLS - LAKE CO PW (PWS ID IL0971750) is the public water system on record for Vernon Hills, Illinois, serving about 33,207 people. Confirm the utility on your water bill before acting on a specific finding.
Surface water (primary source of record in EPA SDWIS).
None of the 29 PFAS in EPA's UCMR 5 testing (2024-06-26 to 2025-03-05) was detected. "Not detected" means below the lab's reporting limit, not proven zero.
Lead is not in Vernon Hills's current published record. Lead usually enters from a building's own pipes and fixtures, so a certified home test is the way to know yours.
PurityMap's current record for Vernon Hills holds 31 findings: 31 not detected. Each finding links to its dated public record; a parameter that was never monitored is shown as pending, not as a pass.
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| Contaminant | Result | Benchmark | 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Lead (90th percentile) | Non-Detect (ND) | 15 µg/L federal action level | Not detected above the reporting limit | 2021–2023 monitoring period | Lead & Copper Rule 90th-percentile: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| 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 | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-06-26 to 2025-03-05 | UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750) |
11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
Perfluoro-3-methoxypropanoic acid (PFMPA)
Perfluoro-4-methoxybutanoic acid (PFMBA)
Perfluorobutanesulfonic acid (PFBS)
Perfluorododecanoic acid (PFDoA)
Perfluoroheptanesulfonic acid (PFHpS)
Perfluoroheptanoic acid (PFHpA)
Perfluorohexanesulfonic acid (PFHxS)
Perfluorohexanoic acid (PFHxA)
Perfluorooctanesulfonic acid (PFOS)
Perfluoropentanesulfonic acid (PFPeS)
Perfluoropentanoic acid (PFPeA)
Perfluorotetradecanoic acid (PFTA)
Perfluorotridecanoic acid (PFTrDA)
Perfluoroundecanoic acid (PFUnA)
Every value is the published result from the cited public record. A reporting limit is the lowest level the method could reliably quantify; a non-detect is not a guarantee of zero.
UCMR5 Analytical Results
UCMR5 Analytical Results: VERNON HILLS - LAKE CO PW (IL0971750)
US EPA
State SDWIS Compliance Record
Lead & Copper Rule 90th-percentile: VERNON HILLS - LAKE CO PW (IL0971750)
US EPA SDWIS
Methodology: how we analyze water. Prepared with AI assistance and reviewed by the PurityMap Editorial Team before publication.
Start with the hot-or-cold tap check. Where Vernon Hills reported something related, it's shown below.
Lead at Vernon Hills: not detected (90th percentile, 2021–2023 monitoring period). Lead has no taste, so a taste neither shows nor rules it out.
A ZIP code is a postal area, not a water service area. Your water bill names your supplier.