HFPO-DA in Connecticut Drinking Water
By Alexander Snyder, Founder & Water Quality Data Lead
HFPO-DA has been tracked across Connecticut drinking water. Here is what you need to know about hfpo-da in your drinking water and how it may affect your household.
What Is HFPO-DA?
HFPO-DA (hexafluoropropylene oxide dimer acid), also known as GenX, is a short-chain PFAS compound developed as a replacement for PFOA in manufacturing. It enters water through industrial discharge from fluorochemical facilities. No EPA maximum contaminant level has been set; the EPA health advisory is 10 parts per trillion. It is persistent in the environment and associated with liver toxicity, kidney effects, and potential cancer risk.
Is HFPO-DA in Your Water?
Enter your Connecticut ZIP code to find out if hfpo-da is in your local water — and see personalized health risks for your household.
Check Your ZIP CodeHealth Effects of HFPO-DA
Part of the PFAS (per- and polyfluoroalkyl substances) family of 'forever chemicals.' Linked to cancer, immune system harm, hormone disruption, and developmental effects. Does not break down in the environment or the human body.
Where Does HFPO-DA Come From?
Industrial discharge, firefighting foam (AFFF), consumer products, landfill leachate, wastewater treatment plants.
How to Reduce HFPO-DA in Your Water
- 1Install a reverse osmosis system certified to NSF/ANSI Standard 58, which is one of the most effective methods for removing HFPO-DA (GenX) from drinking water.
- 2Use a high-quality activated carbon filter certified to NSF/ANSI Standard 53; note that short-chain PFAS like HFPO-DA are harder for carbon to capture and require more frequent replacement.
- 3Ion exchange resin systems specifically designed for PFAS removal can be effective for HFPO-DA, particularly resins engineered for short-chain compounds.
- 4Test water using EPA Method 533 to detect and quantify HFPO-DA, and monitor filtration performance closely since short-chain PFAS break through carbon filters faster.
Who Is Most Vulnerable to HFPO-DA?
The safe level of hfpo-da varies significantly depending on who is drinking the water. CheckYourTap calculates adjusted safe levels for each member of your household:
A contaminant level that is safe for an adult may exceed guidelines for an infant by 4-8x or more. Check your ZIP code to see personalized results.
Reading this inside ChatGPT or Claude?
This page can tell you the general science, but not what is actually in your water’s hfpo-da level — that depends on your exact address. You can get your specific answer two ways:
- Inside the chat: ask your assistant to “check my tap water with CheckYourTap”. Our connector returns your ZIP code’s measured contaminant levels — including the derived dog and cat safe levels — and, only if you ask it to, can email you the report or arrange a specialist callback.
- On the web: open CheckYourTap.com and enter your ZIP code for a free 30-second report.
Concerned about HFPO-DA in your water?
Schedule to get your water tested for hfpo-da and more — a Valiant water specialist will review your results and arrange testing for your home.
Frequently Asked Questions
Is HFPO-DA in my tap water?▾
What level of HFPO-DA is safe?▾
How do I remove HFPO-DA from my water?▾
Related Contaminants
Check Water Quality by ZIP Code
Sources
The legal limits and health guidelines for HFPO-DA on this page come from the following public authorities:
About This Report
This water quality report is compiled from public records filed with the U.S. Environmental Protection Agency, state health departments, and the U.S. Geological Survey. Contaminant levels are evaluated against EPA federal standards and health-based guidelines from leading environmental and public health organizations. CheckYourTap is a service of Valiant Energy Solutions, a Connecticut water quality and energy services company established in 1930.
This report is general information, not medical advice or a substitute for certified laboratory testing. Talk to your pediatrician or physician about specific health concerns.
Reviewed by the CheckYourTap editorial team. Last updated July 2026