PFEESA in Connecticut Drinking Water
By Alexander Snyder, Founder & Water Quality Data Lead
PFEESA has been tracked across Connecticut drinking water. Here is what you need to know about pfeesa in your drinking water and how it may affect your household.
What Is PFEESA?
PFEESA (perfluoro-2-ethoxyethane sulfonic acid) is an ether sulfonate PFAS compound associated with next-generation fluorochemical manufacturing as a replacement for legacy PFAS. It enters water through industrial discharge and contaminated site leachate. No EPA maximum contaminant level has been established. It is environmentally persistent and is associated with potential liver, kidney, and immune system effects based on available toxicological data.
Is PFEESA in Your Water?
Enter your Connecticut ZIP code to find out if pfeesa is in your local water — and see personalized health risks for your household.
Check Your ZIP CodeHealth Effects of PFEESA
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 PFEESA Come From?
Industrial discharge, firefighting foam (AFFF), consumer products, landfill leachate, wastewater treatment plants.
How to Reduce PFEESA in Your Water
- 1Install a reverse osmosis system certified to NSF/ANSI Standard 58 for broad PFAS removal, which is effective against ether sulfonate compounds like PFEESA.
- 2Use an activated carbon block filter certified to NSF/ANSI Standard 53; shorter ether sulfonates may have lower affinity for carbon, so monitor filter lifespan closely.
- 3Consider an ion exchange resin system designed for PFAS removal, which can capture sulfonated PFAS compounds at whole-house flow rates.
- 4Test water using EPA Method 533 to confirm PFEESA levels and monitor treatment effectiveness, as removal data for newer PFAS chemistry is still evolving.
Who Is Most Vulnerable to PFEESA?
The safe level of pfeesa 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 pfeesa 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 PFEESA in your water?
Schedule to get your water tested for pfeesa and more — a Valiant water specialist will review your results and arrange testing for your home.
Frequently Asked Questions
Is PFEESA in my tap water?▾
What level of PFEESA is safe?▾
How do I remove PFEESA from my water?▾
Related Contaminants
Check Water Quality by ZIP Code
Sources
The legal limits and health guidelines for PFEESA 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