Water Quality in Thompson, CT 06262

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

Water quality testing for ZIP code 06262 in Thompson has found 12 contaminants, which is below the state average. While fewer substances were detected here than in some Connecticut communities, several common contaminants like lead, PFAS, and disinfection byproducts may still be present at levels that exceed health guidelines for babies, pregnant women, or elderly residents.

Is Thompson, CT tap water safe to drink?

Whether Thompson tap water is safe depends on your household. 12 contaminants have been detected in ZIP 06262. Federal legal limits and stricter health-based guidelines are not the same thing, and some contaminants matter more for vulnerable groups like infants, pregnancy, and older adults. Enter your ZIP above for a personalized risk assessment.

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See how 12 contaminants affect your specific household members — babies, children, pregnant women, elderly, dogs, and cats.

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Key Facts About Thompson Water

Contaminants Detected

substances found in local water testing

Personalized For

household member types including pets

What Thompson Residents Should Know

Although Thompson's detection count of 12 is near the state average, some of the most common contaminants in Connecticut — like haloacetic acids from chlorine disinfection and lead from aging pipes — are frequently found at levels that exceed stricter health guidelines. The gap between "legal" and "safe" is where personalized risk assessment matters most.

Contaminants Detected in Thompson, CT 06262 Water

Detected in public water testing for ZIP 06262, ranked by how often samples were above the EPA limit. Enforceable health limits are shown in red; secondary (aesthetic) standards like manganese are advisory, not legal limits.

Contaminant	Detected in	Samples	Exceeds EPA limit	EPA limit
CadmiumOTHER	100%	2	50%	0.005 mg/L
ArsenicOTHER	100%	24	37.5%	0.01 mg/L
LeadNO_SAFE_LEVEL	88.8%	80	8.8%	0.015 mg/L
Combined Radium 226/228OTHER	100%	5	No	5 pCi/L
DEHP (Phthalate)OTHER	100%	2	No	0.006 mg/L
Gross AlphaOTHER	100%	4	No	15 pCi/L
Gross BetaOTHER	100%	8	No	4 mrem/year
BariumOTHER	100%	11	No	2 mg/L

Source: EPA SDWIS / UCMR public water testing. Detection and exceedance rates reflect samples in this area; enter your ZIP above for a report personalized to your household. Most recent sample in this area: 2025.

Reading this inside ChatGPT or Claude?

This page can tell you the general science, but not what is actually in your Thompson tap water — 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.

Want to know exactly what’s in your Thompson water?

12 contaminants have been detected in ZIP 06262. Schedule to get your water tested with a Valiant water specialist — they’ll review your results and arrange testing for your home.

Have a dog or cat in Thompson?

3 of the contaminants detected in 06262 have pet-specific concerns — dogs and cats drink far more water per pound of body weight than people, and some are more sensitive. See what they mean for your pet:

Cadmium for dogs in Thompson Cadmium for cats in ThompsonArsenic for dogs in Thompson Arsenic for cats in ThompsonLead for dogs in Thompson Lead for cats in ThompsonAll pet water topics →

Environmental Sites Near Thompson, CT 06262

Documented sites in or near this ZIP from EPA and CT DEEP records. These are most relevant for private-well owners as potential groundwater concerns — public water is treated and tested separately. Their presence near a ZIP does not by itself mean your drinking water is affected, but it’s a reason for well owners to test.

Open CT DEEP cleanup/remediation cases

Spills that reached water

Compiled from EPA (SEMS/TRI/ECHO) and CT DEEP records; many are undated historical site inventories. Most recent dated event in this area: 2023-08-02.

Who in Thompson Is Most Affected

Some contaminants matter more for certain people, because the safe levels for them are stricter than for a healthy adult. Based on the contaminants of concern detected in ZIP 06262 — those found above a limit, or with no safe level (some may be within legal limits but still matter here):

For infants: Cadmium, Arsenic, Lead, and Combined Radium 226/228.
Cadmium a toxic metal that builds up in the kidneys and is of particular concern during pregnancy and early development; Arsenic a developmental toxin linked to harm in pregnancy and early childhood.
For pregnancy: Cadmium, Arsenic, Lead, and Combined Radium 226/228.
Cadmium a toxic metal that builds up in the kidneys and is of particular concern during pregnancy and early development; Arsenic a developmental toxin linked to harm in pregnancy and early childhood.
For young children: Lead.
Lead harms developing brains — there is no safe level for children, and it crosses the placenta.

Tell us who lives in your home above for a report personalized to the people in it.

Frequently Asked Questions

Is the tap water safe to drink in Thompson, CT?▾

What contaminants are in 06262 water?▾

12 contaminants have been detected in the water serving ZIP 06262. The ones most often above EPA limits or standards are Cadmium, Arsenic and Lead. Get a free personalized report to see which affect your household.

Is Thompson water safe for infants, pregnancy, and children?▾

Thompson tap water may meet federal legal limits, but some detected contaminants matter more for certain family members because their safe levels are stricter. For infants, the notable detected contaminants are Cadmium, Arsenic, Lead, and Combined Radium 226/228. For pregnancy, the notable detected contaminants are Cadmium, Arsenic, Lead, and Combined Radium 226/228. For young children, the notable detected contaminants are Lead. Enter your household above for a report personalized to your family.

Is Thompson, CT tap water safe for dogs and cats?▾

3 of the contaminants detected in Thompson (ZIP 06262) have pet-specific concerns — Cadmium, Arsenic, Lead. Dogs and cats drink far more water per pound of body weight than people, and some contaminants are more toxic to them — for cats, permethrin has no safe level, and lead has none for either species. See what each detected contaminant means for your dog or cat, or enter your ZIP for a personalized pet report.

Is CheckYourTap free?▾

Yes, CheckYourTap is completely free. Enter your ZIP code and tell us who lives in your home to get a personalized water quality report with health risk assessments for 120+ contaminants.

Does Thompson have well water data?▾

Yes, CheckYourTap covers both city water (public water systems) and private well water in Thompson and throughout Connecticut. Well water reports use USGS groundwater data and include geology-based risk factors for arsenic, uranium, and radon.

Other ZIP Codes in Thompson

06277

About This Report

Water quality data for Thompson, CT 06262 is compiled from public records filed with the U.S. Environmental Protection Agency (EPA SDWIS), the U.S. Geological Survey (USGS NWIS), and the Connecticut Department of Public Health. Health guidelines reference the strictest available standards from the EWG, California OEHHA, and WHO. Risk assessments are personalized for 11 household member types. CheckYourTap is a service of Valiant Energy Solutions, a Connecticut 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.

By Alexander Snyder, Founder & Water Quality Data Lead. Last updated July 2026