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Environmental Monitoring Results for Radiation

Published by data.ct.gov | State of Connecticut | Metadata Last Checked: October 20, 2025 | Last Modified: 2025-10-14
- Reporting unit of monitoring results is millirem [where 1 millirem = 1 thousandth (10-3) of a Rem] as defined in Regulations of Connecticut State Agencies Section 19-24-4. - Monitoring results below the minimum measurable quantity for the monitoring period are recorded as “M.” - Quarterly results reflect total integrated gamma exposure received within a calendar 3-month time frame. - Environmental monitoring results are reported on a calendar quarterly basis: • 1st Quarter: January, February, March • 2nd Quarter: April, May, June • 3rd Quarter: July, August, September • 4th Quarter: October, November, December - Data Quality Disclaimer: This database is for informational use and is not a controlled quality database. Efforts have been made to ensure accuracy of data in the database; however, errors and omissions may occur. Examples of potential errors include: • Data entry errors. • Monitoring results not reported for entry into the database. • Missing results due to equipment failure or unable to retrieve monitors due to lost or environmental hazards. • Translation errors – the data has been migrated to a newer data platform, and there have been errors and data losses. - Environmental Monitoring Records are from the year 2008 until present. Prior to 2008 results are stored in hardcopy, in a non-database format. Requests for monitor results prior to 2008 or results subject to quality assurance are available from archived records and can be made through the DEEP Freedom of Information Act (FOIA) administrator at deep.foia@ct.gov. Information on FOIA requests can be found on the DEEP website (https://portal.ct.gov/deep) FOIA Administrator Office of the Commissioner Department of Energy and Environmental Protection 79 Elm Street, 3rd Floor Hartford, CT 06106

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