Danbury, CT

Danbury, CT

The City of Danbury is home to an estimated 85,246 residents, and it’s located in Fairfield County, CT.

This report will help you become better acquainted with Danbury and the surrounding area by addressing the following questions:

  • Are there any hazardous sites in Fairfield County, CT?
  • How clean is the air in Fairfield County, CT?
  • What’s the average radon level for homes in Fairfield County, CT?
  • Is the water in Fairfield County, CT safe to drink?

Hazardous Sites near Danbury, CT

There are two Superfund sites in Fairfield County, CT. Superfund sites, like Kellogg-Deering Well Field in Norwalk, CT, are areas that have been contaminated with hazardous substances. If not for the cleanup efforts orchestrated by the EPA, these sites could endanger people living in nearby communities.

The EPA uses the Hazardous Ranking System (HRS) to quantify the risk a contaminated site poses to human health and the environment. Sites assigned HRS scores of 28.5 or greater qualify for placement on the National Priorities List (NPL), and are eligible to receive federal funding for cleanup efforts.

Before the EPA deletes a site from the NPL, it conducts reviews to ensure the cleanup was sufficient. As a result, some sites remain on the active site list long after cleanup activities are complete.

For more information about the Superfund sites located in the Danbury, CT area, be sure to review the map and background information provided below:

Map Legend:


A. Kellogg-Deering Well Field (HRS Score: 40)

The Kellogg-Deering Well Field site is in Norwalk, CT. It consists of municipal water wells as well as nearby properties responsible for contaminating groundwater in the area.

Contaminants found at the Kellogg-Deering Well Field site include:

  • Benzene
  • Chloroform
  • 1,1,1-Trichloroethane
  • Dichloromethane (Methylene Chloride)
  • Toluene

B. Raymark Industries, Inc. (HRS Score: No Data)

The Raymark Industries, Inc. site, where automotive components such as brakes and clutch parts were manufactured from 1919 until 1989, is located in Stratford, CT.

Contaminants found at the Raymark Industries, Inc. site include:

  • Antimony
  • Arsenic
  • Asbestos
  • Barium
  • Benzene

Air Quality in the Danbury, CT Area

The two most widespread forms of air pollution are ozone (smog) and particle pollution (soot). Exposure to these harmful pollutants, for even just a short period, can have adverse effects on your health.

Thanks to data collected by air monitoring equipment located across the country, the American Lung Association (ALA) is able to assess and track our air quality using three metrics:

  • Ozone
  • Short-term Particle Pollution
  • Year-round Particle Pollution

In their 2019 annual report, the ALA rated the air quality in Fairfield County, CT as follows:

Ozone Pollution

Grading Scale: A-F

Particle Pollution

Grading Scale: A-F

Particle Pollution

Grading Scale: Pass/Fail

Radon Levels in Danbury, CT Area

Air quality inside your home can be impacted by a number of factors, including the presence of hazardous substances in building materials (asbestos, lead, formaldehyde, etc.) and local radon levels.

Radon is a naturally occurring gas you cannot see or smell. It can build up inside your home and negatively impact your indoor air quality as well as your health.

To provide a guideline, the EPA assigned one of three zones to each U.S. county and county equivalent:

  • Zone 1 (higher radon levels)
  • Zone 2 (moderate levels)
  • Zone 3 (lower levels)

The average indoor radon reading in Fairfield County, CT is predicted to be higher than 4 picocuries per liter (pCi/L), so the county has been assigned EPA Radon Zone 1.

EPA Radon Zone

The EPA Recommends acting to reduce your home's radon level if it's measured at 4 pCi/L or greater. So, if you're thinking about purchasing a home in Danbury, CT, you should strongly consider having a radon test performed.

Water Quality in Danbury, CT Area

In accordance with the Safe Drinking Water Act (SDWA), the EPA sets regulatory limits for drinking water contaminants known to cause adverse health effects.

The following Fairfield County, CT water provider(s) violated the maximum allowable level for one or more regulated contaminants:

Filter ValueWater SystemContaminantHealth Effects
09001Aquarion Water Co of Ct-Western BrookfldCombined UraniumIncreased risk of cancer, kidney toxicity 
09001Bethel Water DeptTTHMLiver, kidney, or central nervous system problems; increased risk of cancer 
09001Lake Lillinonah Shores CondosCombined UraniumIncreased risk of cancer, kidney toxicity 
09001Meadowbrook Terrace Mobile Home ParkCombined Radium (-226 and -228)Increased risk of cancer 
09001Meadowbrook Terrace Mobile Home ParkCombined UraniumIncreased risk of cancer, kidney toxicity 
09001Meadowbrook Terrace Mobile Home ParkGross Alpha, Excl. Radon and UIncreased risk of cancer
09001Stony Hill Village Condominium AssnCombined UraniumIncreased risk of cancer, kidney toxicity 
09001Stony Hill Village Condominium AssnGross Alpha, Excl. Radon and UIncreased risk of cancer

In addition to setting enforceable standards for harmful contaminants, the EPA also established guidelines to assist public water providers in managing the taste, odor and color of their drinking water.

To find out more about what’s in your drinking water, contact your utility company and request a copy of the latest Consumer Confidence Report.

Sources and Methods

Hazardous Sites: Identified using a report from the Environmental Protection Agency (EPA), hazardous sites detailed on trendingtowns.com represent sites contained on the National Priorities List (NPL) as of November 25, 2019.  The NPL is the list of national priorities among the known releases or threatened releases of hazardous substances, pollutants, or contaminants throughout the United States and its territories.  All site-related data was sourced from the EPA.

Air Quality: Grades for ozone, short-term particle pollution, and year-round particle pollution were obtained from State of the Air 2019, a report compiled by the American Lung Association.

Radon Zones: Radon zone designations were obtained using a public use dataset provided by the EPA (September 11, 2019).

Water Quality: Drinking water violation data was sourced from the Safe Drinking Water Information System (SDWIS), a public use database provided by the EPA.  The dataset included violations submitted to the database as of the third quarter of 2019.


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