Waldorf, MD · PFAS · forever chemicals
Is There PFAS in Waldorf Tap Water?
Waldorf, MD: PFBS 3.1 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
3 of 29 PFAS detected
Each result is read against its own reference. None of the detected compounds has a federal limit. PFPeA has no federal or state limit and is shown for transparency, not graded.
- PFBSEPA health advisoryPerfluorobutanesulfonic acid3.1ng/LDetected, below its EPA health advisory · sampled 2024-07-15 to 2026-05-19Evidence
- PFHxAState MCL · MichiganPerfluorohexanoic acid5.1ng/LDetected, below its state limit · sampled 2024-07-15 to 2026-05-19Evidence
- PFPeANo limitPerfluoropentanoic acid6ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2024-07-15 to 2026-05-19Evidence
All 29 compounds in this record
- PFOAMCLNot detected
- PFOSMCLNot detected
- PFHxSMCLNot detected
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFBS3.1 ng/L
- PFHxA5.1 ng/L
- PFPeA6 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
- 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 |
|---|---|---|---|---|---|
| Perfluorobutanesulfonic acid (PFBS) | 3.1 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorohexanoic acid (PFHxA) | 5.1 ng/L | 400,000 ng/L Michigan EGLE state MCL (strictest US state) | Within a historical reference; current applicability unverified | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoropentanoic acid (PFPeA) | 6 ng/L | No federal or state limit; shown for transparency | Detected, no limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| 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 | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals) | < 5 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA) | < 6 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Nonafluoro-3,6-dioxaheptanoic acid (NFDHA) | < 20 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoro-3-methoxypropanoic acid (PFMPA) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoro-4-methoxybutanoic acid (PFMBA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorobutanoic acid (PFBA) | < 5 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorodecanoic acid (PFDA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorododecanoic acid (PFDoA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoroheptanesulfonic acid (PFHpS) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoroheptanoic acid (PFHpA) | < 3 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorohexanesulfonic acid (PFHxS) | < 3 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorononanoic acid (PFNA) | < 4 ng/L | 10 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorooctanesulfonic acid (PFOS) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorooctanoic acid (PFOA) | < 4 ng/L | 4.0 ng/L federal MCL (2024) | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoropentanesulfonic acid (PFPeS) | < 4 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorotetradecanoic acid (PFTA) | < 8 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluorotridecanoic acid (PFTrDA) | < 7 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
| Perfluoroundecanoic acid (PFUnA) | < 2 ng/L | No federal or state limit; shown for transparency | Not detected above the reporting limit | 2024-07-15 to 2026-05-19 | UCMR5 Analytical Results: WALDORF - CHARLES COUNTY DPW (MD0080049) |
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 Waldorf sitsNot on the stripWaldorf’s PFOS result was below the lab’s reporting limit.
What this record covers
- WALDORF - CHARLES COUNTY DPW's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2024-07-15 to 2026-05-19.
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
- PFBS · detected below the limit
- PFHxA · detected below the limit
- PFPeA · 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 Waldorf tap water?
In EPA's UCMR 5 testing of WALDORF - CHARLES COUNTY DPW (2024-07-15 to 2026-05-19): PFBS 3.1 ng/L (EPA health advisory 2,000), PFHxA 5.1 ng/L (state limit 400,000), PFPeA 6 ng/L (no federal or state limit) and the other 26 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: WALDORF - CHARLES COUNTY DPW (MD0080049)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: WALDORF - CHARLES COUNTY DPW (MD0080049)US EPA SDWIS · 2026-07-09View source ↗