Is There PFAS in Cary Tap Water?
Cary, IL: PFHxA 6.9 ng/L detected, below the 400,000 ng/L state limit, in 2024 testing. Every PFAS result and filter certifications per compound.
5 of 29 PFAS detected
Each result is read against its own reference. None of the detected compounds has a federal limit. 6:2 FTS, PFBA, PFHpA and PFPeA have no federal or state limit and are shown for transparency, not graded.
- PFHxAState MCL · MichiganPerfluorohexanoic acid6.9ng/LDetected, below its state limit · sampled 2024-05-29 to 2024-11-13Evidence
- PFPeANo limitPerfluoropentanoic acid12ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-05-29 to 2024-11-13Evidence - PFBANo limitPerfluorobutanoic acid7.4ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-05-29 to 2024-11-13Evidence - 6:2 FTSNo limit1H, 1H, 2H, 2H-perfluorooctane sulfonic acid5.7ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-05-29 to 2024-11-13Evidence - PFHpANo limitPerfluoroheptanoic acid4ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-05-29 to 2024-11-13Evidence
- PFOAMCLNot detected
- PFOSMCLNot detected
- PFHxSMCLNot detected
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFHxA6.9 ng/L
- 6:2 FTS5.7 ng/L
- PFBA7.4 ng/L
- PFHpA4 ng/L
- PFPeA12 ng/L
- 11Cl-PF3OUdSNot detected
- 4:2 FTSNot detected
- 8:2 FTSNot detected
- 9Cl-PF3ONSNot detected
- ADONANot detected
- NEtFOSAANot detected
- NFDHANot detected
- NMeFOSAANot detected
- PFBSNot detected
- PFDANot detected
- PFDoANot detected
- PFEESANot detected
- PFHpSNot detected
- PFMBANot detected
- PFMPANot detected
- PFPeSNot detected
- PFTANot detected
- PFTrDANot detected
- PFUnANot detected
MCL marks the 5 PFAS given a federal limit in EPA's 2024 rule. EPA has proposed rescinding three of those limits; they apply until a final rule.
Results as a table29 results with limit, status, sample date and source
| Contaminant | Result | Limit | Status | Sampled | Source |
|---|---|---|---|---|---|
| Perfluorohexanoic acid (PFHxA) | 6.9 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS) | 5.7 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorobutanoic acid (PFBA) | 7.4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoroheptanoic acid (PFHpA) | 4 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoropentanoic acid (PFPeA) | 12 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 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 | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 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 | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 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 | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 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 | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| 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 | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-05-29 to 2024-11-13 | UCMR5 Analytical Results: CARY (IL1110100) |
PFOS across 764 cities with a detected value
3,396 more were below the lab's 4 ng/L reporting limit and aren't plotted, and 34 have no result on record. 66 cities above 25 ng/L are grouped in the last bar. A position here is not a verdict on the water.
have a regulated PFAS above the federal limit.
PFAS across Illinois →- CARY's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2024-05-29 to 2024-11-13.
- The water at your tap. Building plumbing isn't in this record.
- PFAS not listed in the 29 above were not reported in these records.
- Levels since the last sample have not been published.
Test first, then match a certified method.
A tap test can confirm levels at your home before you choose treatment.
- PFHxA · detected below the limit
- 6:2 FTS · detected, no federal or state limit
- PFBA · detected, no federal or state limit
- PFHpA · detected, no federal or state limit
- PFPeA · detected, no federal or state limit
- Reverse osmosisOpen the method →
- Activated carbon (GAC)Open the method →
- Anion exchangeOpen the method →
Frequently asked
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Is there PFAS in Cary tap water?
In EPA's UCMR 5 testing of CARY (2024-05-29 to 2024-11-13): 6:2 FTS 5.7 ng/L (no federal or state limit), PFBA 7.4 ng/L (no federal or state limit), PFHpA 4 ng/L (no federal or state limit), PFHxA 6.9 ng/L (state limit 400,000), PFPeA 12 ng/L (no federal or state limit) and the other 24 PFAS tested not detected. "Not detected" means below the lab's reporting limit, not proven zero.
What are the federal PFAS limits?
EPA's 2024 drinking-water rule set maximum contaminant levels of 4.0 ng/L for PFOA and for PFOS, and 10 ng/L for PFHxS, PFNA and HFPO-DA (GenX). In May 2026 EPA proposed keeping the PFOA and PFOS limits, with the option of until 2031 to comply, and rescinding the other three. Until a final rule, all five limits apply. Results above them today are above the limits in force.
How do I remove PFAS from my tap water?
Reverse-osmosis systems and filters certified to NSF/ANSI 53 or 58 for PFOA/PFOS reduction are the proven options at the tap. Check the certifier's listing (NSF, WQA or IAPMO) for the exact model, and replace cartridges on schedule.
- UCMR5 Analytical ResultsUCMR5 Analytical Results: CARY (IL1110100)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: CARY (IL1110100)US EPA SDWIS · 2026-07-09View source ↗