Alpha-Hexachlorocyclohexane in Connecticut Drinking Water
By Alexander Snyder, Founder & Water Quality Data Lead
Alpha-Hexachlorocyclohexane has been tracked across Connecticut drinking water. Here is what you need to know about alpha-hexachlorocyclohexane in your drinking water and how it may affect your household.
What Is Alpha-Hexachlorocyclohexane?
Alpha-hexachlorocyclohexane (alpha-HCH) is a legacy organochlorine pesticide and a byproduct of lindane production. It persists in groundwater near former agricultural and industrial sites due to its environmental stability. No EPA maximum contaminant level has been set specifically for alpha-HCH. It is classified as a probable human carcinogen and is associated with liver damage, immune system effects, and neurological harm from chronic exposure.
Is Alpha-Hexachlorocyclohexane in Your Water?
Enter your Connecticut ZIP code to find out if alpha-hexachlorocyclohexane is in your local water — and see personalized health risks for your household.
Check Your ZIP CodeHealth Effects of Alpha-Hexachlorocyclohexane
Probable human carcinogen. Liver damage, immune system effects, neurological harm.
Where Does Alpha-Hexachlorocyclohexane Come From?
Legacy pesticide (lindane-related); contaminated groundwater near former agricultural and industrial sites.
How to Reduce Alpha-Hexachlorocyclohexane in Your Water
- 1Install a point-of-use activated carbon block filter certified to NSF/ANSI Standard 53 for organic contaminant reduction; activated carbon has strong adsorption capacity for organochlorine compounds.
- 2A reverse osmosis system certified to NSF/ANSI Standard 58 provides additional removal of alpha-HCH and related legacy pesticide residues.
- 3For whole-house treatment, use a granular activated carbon tank system at the point of entry, which is effective for chlorinated organic compounds.
- 4Test water through a certified laboratory if located near former agricultural or pesticide manufacturing sites, and replace carbon media on the manufacturer's schedule.
Who Is Most Vulnerable to Alpha-Hexachlorocyclohexane?
The safe level of alpha-hexachlorocyclohexane 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 alpha-hexachlorocyclohexane 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 Alpha-Hexachlorocyclohexane in your water?
Schedule to get your water tested for alpha-hexachlorocyclohexane and more — a Valiant water specialist will review your results and arrange testing for your home.
Frequently Asked Questions
Is Alpha-Hexachlorocyclohexane in my tap water?▾
What level of Alpha-Hexachlorocyclohexane is safe?▾
How do I remove Alpha-Hexachlorocyclohexane from my water?▾
Related Contaminants
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Sources
The legal limits and health guidelines for Alpha-Hexachlorocyclohexane 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