Liberty Lake, WA · PFAS · forever chemicals
Is There PFAS in Liberty Lake Tap Water?
Liberty Lake, WA: PFBS 3.2 ng/L detected, below the 2,000 ng/L EPA health advisory, 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.
- PFBSEPA health advisoryPerfluorobutanesulfonic acid3.2ng/LDetected, below its EPA health advisory · sampled 2024-12-05 to 2025-05-15Evidence
All 29 compounds in this record
- PFOAMCLNot detected
- PFOSMCLNot detected
- PFHxSMCLNot detected
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFBS3.2 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
- PFBANot 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 |
|---|---|---|---|---|---|
| Perfluorobutanesulfonic acid (PFBS) | 3.2 ng/L | 2,000 ng/L EPA health advisory (screening, not a legal limit)Screening level, not a legal limit | Within the referenced health-based guidance value | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 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 | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 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 | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 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 | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 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 | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| 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 | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorohexanoic acid (PFHxA) | < 3 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoropentanoic acid (PFPeA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-12-05 to 2025-05-15 | UCMR5 Analytical Results: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150) |
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 Liberty Lake sitsNot on the stripLiberty Lake’s PFOS result was below the lab’s reporting limit.
In Washington
21of 123 city reports
have a regulated PFAS above the federal limit.
PFAS across Washington →What this record covers
- LIBERTY LAKE SEWER & WATER DISTRICT's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2024-12-05 to 2025-05-15.
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
- PFBS · detected below the 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 Liberty Lake tap water?
In EPA's UCMR 5 testing of LIBERTY LAKE SEWER & WATER DISTRICT (2024-12-05 to 2025-05-15): PFBS 3.2 ng/L (EPA health advisory 2,000) 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: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: LIBERTY LAKE SEWER & WATER DISTRICT (WA5347150)US EPA SDWIS · 2026-07-09View source ↗