Is There PFAS in Cincinnati Tap Water?
Cincinnati, OH: PFOS 6.1 ng/L, 1.5× EPA's 4 ng/L limit. Every PFAS result and filter certifications per compound.
3 of 29 PFAS detected
Each result is read against its own reference. Only PFOS has a federal limit. PFBA has no federal or state limit and is shown for transparency, not graded.
- PFOSFederal MCLPerfluorooctanesulfonic acid6.1ng/LAbove its limit · sampled 2023-05-10 to 2024-02-05Evidence
- PFBSEPA health advisoryPerfluorobutanesulfonic acid4.1ng/LDetected, below its EPA health advisory · sampled 2023-05-10 to 2024-02-05Evidence
- PFBANo limitPerfluorobutanoic acid5.2ng/L
No federal or state limit: shown for transparency, not graded.
Detected, no limit · sampled 2023-05-10 to 2024-02-05Evidence
- PFOAMCLNot detected
- PFOSMCL6.1 ng/L
- PFHxSMCLNot detected
- PFNAMCLNot detected
- HFPO-DA (GenX)MCLNot detected
- PFBS4.1 ng/L
- PFBA5.2 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
- 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.
PFOS across 681 cities with a detected value
3,077 more were below the lab's 4 ng/L reporting limit and aren't plotted, and 34 have no result on record. 63 cities above 25 ng/L are grouped in the last bar. A position here is not a verdict on the water.
- CINCINNATI PUBLIC WATER SYSTEM's water system as a whole, as reported to EPA UCMR 5.
- 29 PFAS compounds, each with its own result.
- Samples taken 2023-05-10 to 2024-02-05.
- 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.
- PFOS · exceeds the limit
- PFBS · detected below the limit
- PFBA · detected, no federal or state limit
- Reverse osmosisOpen the method →
- Activated carbon (GAC)Open the method →
- Anion exchangeOpen the method →
Fit for Cincinnati’s PFAS, compound by compound
Each filter is checked against the 3 PFAS detected here. A ✓ needs a current certification record that names the compound. A PFAS claim on the box is not enough.
As an Amazon Associate, PurityMap earns from qualifying purchases. A product appears here only when a current certification record covers at least one identified concern; every concern stays listed. The retail offer is looked up afterwards and never changes which products appear or their order. Affiliate disclosure.
- ✓Certified for this compound
- ?Claimed or likely, not established
- –No claim on record
Aquasana Claryum 3-Stage Max Flow Under-Sink Filter (AQ-6300M)
Activated Carbon (Claryum)- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
Aquasana Clean Water Machine Countertop Filter (AQ-CWM2)
Activated Carbon (Claryum)- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)
Reverse Osmosis- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
Under-Sink Reverse-Osmosis System
Reverse Osmosis- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
Waterdrop G3P600 Tankless Reverse-Osmosis System
Reverse Osmosis- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
Whirlpool Filter 3 Refrigerator Water Filter (WHR3RXD1)
Activated Carbon- PFOS6.1 ng/L✓Certified for this compound
- PFBS4.1 ng/L–No claim on record
- PFBA5.2 ng/L–No claim on record
Certified for PFOS; not established for PFBS, PFBA.
- Browse, not a match:
- Brita Elite Water Filter Pitcher
- Clearly Filtered Pitcher (lab-tested, not NSF 53 certified)
- Culligan ZeroWater 10-Cup Pitcher (ZEROP10)
- Under-Sink Carbon Block Filter
Frequently asked
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Is there PFAS in Cincinnati tap water?
In EPA's UCMR 5 testing of CINCINNATI PUBLIC WATER SYSTEM (2023-05-10 to 2024-02-05): PFBA 5.2 ng/L (no federal or state limit), PFBS 4.1 ng/L (EPA health advisory 2,000), PFOS 6.1 ng/L (limit 4) 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: CINCINNATI PUBLIC WATER SYSTEM (OH3102612)US EPA · 2026-01-15View source ↗
- State SDWIS Compliance RecordLead & Copper Rule 90th-percentile: CINCINNATI PUBLIC WATER SYSTEM (OH3102612)US EPA SDWIS · 2026-07-09View source ↗