Water Quality in Colchester, CT 06415
By Alexander Snyder, Founder & Water Quality Data LeadLast reviewed July 2026
48 contaminants have been detected in the water supply serving 06415 in Colchester, CT — more than double the state average. At this level, multiple contaminants may exceed health-based guidelines even if they remain within federal legal limits. A personalized report can show which specific substances pose the greatest concern for who actually lives in your home.
Is Colchester, CT tap water safe to drink?
Whether Colchester tap water is safe depends on your household. 48 contaminants have been detected in ZIP 06415. 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.
Get Your Personalized Report
See how 48 contaminants affect your specific household members — babies, children, pregnant women, elderly, dogs, and cats.
Check 06415 Water NowKey Facts About Colchester Water
48
substances found in local water testing
11
household member types including pets
What Colchester Residents Should Know
With 48 contaminants detected, Colchester's water supply warrants careful review — particularly for households with young children or pregnant women. Federal legal limits (MCLs) were set decades ago for many substances and don't account for newer research on low-dose chronic exposure. Health guidelines from independent researchers are often 10x to 100x stricter.
Contaminants Detected in Colchester, CT 06415 Water
Detected in public water testing for ZIP 06415, 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 |
|---|---|---|---|---|
| PFOSNO_SAFE_LEVEL | 100% | 8 | 100% | 4 ppt |
| ArsenicOTHER | 100% | 2 | No | 0.01 mg/L |
| Benzo(a)pyreneOTHER | 100% | 1 | No | 0.0002 mg/L |
| Combined Radium 226/228OTHER | 100% | 6 | No | 5 pCi/L |
| DEHP (Phthalate)OTHER | 100% | 6 | No | 0.006 mg/L |
| Gross AlphaOTHER | 100% | 7 | No | 15 pCi/L |
| Gross BetaOTHER | 100% | 4 | No | 4 mrem/year |
| Tetrachloroethylene (PCE)OTHER | 100% | 8 | No | 0.005 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: 2023.
Reading this inside ChatGPT or Claude?
This page can tell you the general science, but not what is actually in your Colchester 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 Colchester water?
48 contaminants have been detected in ZIP 06415. 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 Colchester?
2 of the contaminants detected in 06415 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 Colchester, CT 06415
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: 2024-05-07.
Who in Colchester 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 06415 — those found above a limit, or with no safe level (some may be within legal limits but still matter here):
For infants: PFOS, Arsenic, and Combined Radium 226/228.
PFOS 'forever chemicals' linked to developmental and immune effects; can transfer through the placenta and breast milk; Arsenic a developmental toxin linked to harm in pregnancy and early childhood.
For pregnancy: PFOS, Arsenic, and Combined Radium 226/228.
PFOS 'forever chemicals' linked to developmental and immune effects; can transfer through the placenta and breast milk; Arsenic a developmental toxin linked to harm in pregnancy and early childhood.
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 Colchester, CT?▾
What contaminants are in 06415 water?▾
Is Colchester water safe for infants, pregnancy, and children?▾
Is Colchester, CT tap water safe for dogs and cats?▾
Is CheckYourTap free?▾
Does Colchester have well water data?▾
Nearby Areas
Related Reading
- Arsenic in Well Water for Dogs: The Real Screening Level Is 10 ppb, Not 0.004
- How to Read Your Water Quality Report (CCR) as a New Parent
- Arsenic and Heart Disease in the Elderly: Why Lifetime Exposure Compounds Cardiovascular Risk
- Well Water Testing for Newborns: The 7 Contaminants to Test Before Formula
About This Report
Water quality data for Colchester, CT 06415 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