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Is There Lead in Madison, CT Water? (ZIP 06443)

By Alexander Snyder, Founder & Water Quality Data LeadLast reviewed August 2026

Lead appears in the preserved historical public-system catalog associated with Madison, CT ZIP 06443. The old percentage and comparator fields are not republished by this route recovery, and the ZIP association does not identify a property's serving utility or measure its tap.

Federal legal limits and other governed references answer different questions. Neither establishes exposure, safety, or health risk at a specific property.

What Is Lead?

Lead is a neurotoxic metal that can enter drinking water from lead service lines, pipes, solder, and plumbing. Exposure during childhood can permanently impair intellectual development and behavior.

This is exact-analyte context. It does not establish that lead is present at a property or that a ZIP-associated record represents exposure.

Who May Need Closer Review?

The governed EWG release identifies these household groups for closer lead review. The classification does not lower or multiply the cited reference and does not determine anyone's exposure.

Pregnant
Newborns (<3mo)
Infants (<1yr)
Breastfeeding
Toddlers (1-2)
Children (2-6)
Children (6-11)

Confirm the serving utility and use a certified property sample before making a health, exposure, or treatment decision.

How to Reduce Lead at a Property

The reviewed certification sources include an exact Lead reduction claim under NSF/ANSI 53 or NSF/ANSI 58. Certification is product- and claim-specific; the standard number alone does not prove a product reduces lead.

  1. 1Confirm the analyte and concentration at the relevant tap or well with a certified laboratory before choosing treatment; a ZIP-associated record is not a property result.
  2. 2Choose a specific current product whose independent certification listing and performance data sheet explicitly name the exact reduction claim. A standard number by itself is not an analyte claim.
  3. 3Follow the certified product's inlet conditions, installation, service-life, and replacement instructions, then retest treated water to verify performance at the property.

Certification verifies a named reduction claim under defined test conditions; it does not certify that every installation reaches CheckYourTap's EWG/OEHHA health reference.

Review associated Lead records

Review the source, sample period, unit, and governed reference for ZIP-associated records. This is not a property exposure or health-risk assessment.

Review ZIP 06443 Records

Historical catalog coverage

Lead appears in the preserved catalog for 266 Connecticut ZIP associations, including Madison (06443). This is historical route and identity context only. It does not establish a current detection, rate, exceedance, serving utility, or property result.

Lead in nearby Connecticut towns:

Ivoryton 06442Higganum 06441Marlborough 06447Haddam 06438

Other preserved contaminant pages for Madison (06443)

AntimonyCadmiumBariumCopperArsenic

See the full Madison ZIP record summary →

Frequently Asked Questions

Is there Lead in Madison 06443 tap water?▾
Lead appears in the preserved historical public-system catalog associated with Madison, CT ZIP 06443. The old percentage and comparator fields are not republished by this route recovery, and the ZIP association does not identify a property's serving utility or measure its tap.
Do these records prove Lead is at a property?▾
No. These are monitoring records associated with ZIP 06443; they do not identify the property's serving utility or establish that Lead is present at its tap. Confirm the utility and use a certified property sample when a property-level answer is needed.
What health reference is released for Lead?▾
The released EWG health-protective reference for Lead is 0.2 ppb. It is not an EPA compliance conclusion, a finding about ZIP 06443, or a property-specific safe level.
How can Lead be reduced at a property?▾
The reviewed certification sources include an exact Lead reduction claim under NSF/ANSI 53 or NSF/ANSI 58. Certification is product- and claim-specific; confirm the property result, verify the current product listing and performance sheet, follow its conditions, and retest treated water.

About this report

This page restores the preserved historical Lead catalog route associated with Madison, CT (06443) from public-system records filed with the U.S. Environmental Protection Agency and Connecticut Department of Public Health. The historical percentage and comparator fields are retained in source control but are not rendered by this fallback. Use the live lookup for current source-system rows. CheckYourTap is funded by Valiant Energy Solutions, a Connecticut company established in 1930.

By Alexander Snyder, Founder & Water Quality Data Lead.

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.

Last updated August 2026.

Reading this inside ChatGPT or Claude?

This page can explain the general science about ZIP-associated Lead records, 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.