Water Quality in Middlefield, CT 06455
By Alexander Snyder, Founder & Water Quality Data LeadLast reviewed July 2026
Water quality testing for ZIP code 06455 in Middlefield has found 13 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 Middlefield, CT tap water safe to drink?
Whether Middlefield tap water is safe depends on your household. 13 contaminants have been detected in ZIP 06455. 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 13 contaminants affect your specific household members — babies, children, pregnant women, elderly, dogs, and cats.
Check 06455 Water NowKey Facts About Middlefield Water
13
substances found in local water testing
11
household member types including pets
What Middlefield Residents Should Know
Although Middlefield's detection count of 13 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 Middlefield, CT 06455 Water
Detected in public water testing for ZIP 06455, 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 |
|---|---|---|---|---|
| LeadNO_SAFE_LEVEL | 79.2% | 149 | 4.7% | 0.015 mg/L |
| CopperHAS_SAFE_LEVEL | 100% | 157 | 2.5% | 1.3 mg/L |
| NitrateHAS_SAFE_LEVEL | 100% | 248 | 0.4% | 10 mg/L as N |
| ArsenicOTHER | 100% | 12 | No | 0.01 mg/L |
| Combined Radium 226/228OTHER | 100% | 17 | No | 5 pCi/L |
| Gross AlphaOTHER | 100% | 10 | No | 15 pCi/L |
| Gross BetaOTHER | 100% | 3 | No | 4 mrem/year |
| UraniumOTHER | 100% | 1 | No | 0.03 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 Middlefield 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 Middlefield water?
13 contaminants have been detected in ZIP 06455. 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 Middlefield?
4 of the contaminants detected in 06455 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:
Environmental Sites Near Middlefield, CT 06455
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.
Compiled from EPA (SEMS/TRI/ECHO) and CT DEEP records; many are undated historical site inventories. Most recent dated event in this area: 2025-12-31.
Who in Middlefield 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 06455 — those found above a limit, or with no safe level (some may be within legal limits but still matter here):
For infants: Lead, Copper, Nitrate, Arsenic, Combined Radium 226/228, and Uranium.
Lead harms developing brains — there is no safe level for children, and it crosses the placenta; Copper infants are more sensitive to copper's effects at a given level.
For pregnancy: Lead, Nitrate, Arsenic, Combined Radium 226/228, and Uranium.
Lead harms developing brains — there is no safe level for children, and it crosses the placenta; Nitrate can cause 'blue baby syndrome' (methemoglobinemia) in infants under 6 months.
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
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About This Report
Water quality data for Middlefield, CT 06455 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