Antimony in Connecticut Drinking Water
By Alexander Snyder, Founder & Water Quality Data Lead
The EPA legal limit (MCL) for Antimony is 6 ppb, but the health-protective reference published by EWG is 1 ppb. That health reference is roughly 6x stricter than the legal value.
Antimony is listed in preserved public-system records associated with 53 Connecticut ZIP codes. This page summarizes record coverage and governed reference values. It does not establish that antimony is present at a property, identify its serving utility, or determine exposure, safety, or health risk.
What Is Antimony?
Antimony is a naturally occurring metal that can enter tap water from plumbing fittings and industrial uses including metal alloys, batteries, and plastics.
Review Antimony Records Near You
Enter a Connecticut ZIP code to review associated public-system or regional monitoring records. The lookup does not identify the serving utility or measure a property.
Check Your ZIP CodeHealth Effects of Antimony
- Liver Effects
- Gastrointestinal Effects
These are source-classified outcomes in the exact EWG release, not a diagnosis, exposure determination, or finding about a property. See the cited reference below.
Safety Guidelines
Health Guideline
1 ppb
Source: EWG
Legal Limit (MCL)
6 ppb
EPA Maximum Contaminant Level
Antimony's health-protective reference is roughly 6x stricter than the legal limit (MCL).
| Standard | Level | Source |
|---|---|---|
| EPA legal limit (MCL) | 6 ppb | EPA — legal/regulatory context |
| Health-protective reference | 1 ppb | EWG |
| Gap | ~6x stricter than legal | |
Where Does Antimony Come From?
Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder
This preserved EPA table describes common ways antimony can enter drinking water. It is source context, not a finding that any source applies to a ZIP, utility, property, or tap, and not a health-standard or treatment claim.
Reading this inside ChatGPT or Claude?
This page can explain the general science about Antimony records associated with a ZIP, but it cannot identify what is at a specific tap or property. You can get ZIP-level context two ways:
- Inside the chat: ask your assistant to “check my tap water with CheckYourTap”. Our connector returns available public-system or regional monitoring records associated with your ZIP. It does not identify your serving utility or test your tap, well, or property. The current connector is read-only and does not email reports or submit contact information.
- On the web: open CheckYourTap.com and enter your ZIP code for a free ZIP-level report.
Need to confirm Antimony at a property?
A certified sample from the relevant tap or well can establish whether antimony is present before any health, filtration, or treatment decision.
CheckYourTap is an independent water-quality service, not your town or utility. We connect you with a vetted local partner. Your online report is free. Testing and treatment are paid services, and there's no cost to talk.
Frequently Asked Questions
Is Antimony in my tap water?▾
What reference values are shown for Antimony?▾
Related Contaminants
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Sources
The exact released health reference and the reviewed sources for this definition are listed below:
About This Report
This page restores the preserved Connecticut route and historical public-record catalog. It does not publish the catalog’s old percentages or promote its stored threshold fields. Exact released health references come from EWG or California OEHHA; EPA material is legal, regulatory, and source context. CheckYourTap is an independent water-quality service funded by 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.
Unmatched analytes remain visible without a numeric health verdict. Last reviewed August 2026.