PFAS Information | Cedar Heights System

Aquarion actions to address PFAS

On June 15, 2022, the US EPA issued revised health advisories for four PFAS based on new information on the life-long exposure risk to these compounds. CT DPH also issued revised guidance on June 15, 2022 with the issuance of Action Levels for four PFAS compounds.

Below are Aquarion's sampling results for the Cedar Heights System in Danbury, Connecticut, addressing PFOS levels in that community above the newly-established action levels of 10 ppt.

scientist testing flask of water

About the Cedar Heights System

The Cedar Heights System (PWS ID CT340131) in Danbury, Connecticut consists of two groundwater sources:

  1. Cedar Heights Wells: PFOS historical average of 11 ppt with 5 of 8 historical samples above new Action Level of 10 ppt
  2. Cedars Well: PFOS historical average of 10 ppt with 1 of 8 historical samples above new Action Level of 10 ppt

Action plan summary for the Cedar Heights System

See below for an action plan summary for the Cedar Heights System in Danbury, Connecticut:

  • Short-term solution: Both water sources, Cedar Heights Wells and Cedar Wells, must remain online to ensure adequate water supply.
  • Long-term solution: Aquarion is currently designing an interconnection with another water system as part of construction planned for 2023. Once completed, the interconnection will enable both Cedar Heights Wells and Cedar Well to be shut off.

Aquarion will remain vigilant about this important issue and will continue to share test results with our customers and state and local officials. We will also continue to work with public health agencies and drinking water associations to ensure the protection of our drinking water supplies, and delivery of high-quality water to our customers.

Cedar Heights System PFAS Sampling Results

The table below includes historical sampling results for the Cedar Heights System, highlighting individual results above the new PFOS Action Level of 10 ppt:

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Cedar Heights System PFAS sampling results table

Additional Resources

Learn more about PFAS and the Connecticut Department of Public Health's Drinking Water Section Strategy at ct.gov.

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