Danville, IL · PFAS · forever chemicals
Is There PFAS in Danville Tap Water?
Danville, IL: PFBA 7.3 ng/L detected (no federal or state limit) in 2024 testing. Every PFAS result and filter certifications per compound.
The measurements · EPA UCMR 5
1 of 29 PFAS detected
Each result is read against its own reference. None of the detected compounds has a federal limit. PFBA has no federal or state limit and is shown for transparency, not graded.
- PFBANo limitPerfluorobutanoic acid7.3ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2023-09-18 to 2024-06-19Evidence
All 29 compounds in this record
- PFOAMCLNot detected
- PFOSMCLNot detected
- PFHxSMCLNot detected
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFBA7.3 ng/L
- 11Cl-PF3OUdSNot detected
- 4:2 FTSNot detected
- 6:2 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
- PFHpANot detected
- PFHpSNot detected
- PFHxANot detected
- PFMBANot detected
- PFMPANot detected
- PFPeANot 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 |
|---|---|---|---|---|---|
| Perfluorobutanoic acid (PFBA) | 7.3 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| 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 | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2023-09-18 to 2024-06-19 | UCMR5 Analytical Results: AQUA ILLINOIS-VERMILION COUNTY (IL1835120) |
How this compares
PFOS across 764 cities with a detected value
4 ng/L federal MCL (2024)
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.
Where Danville sitsNot on the stripDanville’s PFOS result was below the lab’s reporting limit.
In Illinois
10of 220 city reports
have a regulated PFAS above the federal limit.
PFAS across Illinois →What this record covers
- AQUA ILLINOIS-VERMILION COUNTY's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2023-09-18 to 2024-06-19.
What is unknown
- 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.
Treatment capabilities that apply
Test first, then match a certified method.
A tap test can confirm levels at your home before you choose treatment.
Identified concerns
- PFBA · detected, no federal or state limit
- Reverse osmosisOpen the method →
- Activated carbon (GAC)Open the method →
- Anion exchangeOpen the method →
No product in our catalogue has verified certification for these concerns yet.
Questions
Frequently asked
Follow this water
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Is there PFAS in Danville tap water?
In EPA's UCMR 5 testing of AQUA ILLINOIS-VERMILION COUNTY (2023-09-18 to 2024-06-19): PFBA 7.3 ng/L (no federal or state limit) and the other 28 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: AQUA ILLINOIS-VERMILION COUNTY (IL1835120)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: AQUA ILLINOIS-VERMILION COUNTY (IL1835120)US EPA SDWIS · 2026-07-09View source ↗