Environmental Laboratory Certification Program (ELCP)

- In-state Approved Commercial Environmental Laboratories
- In-state Approved Laboratories Certified to Test Drinking Water
- Out-of-State Approved Commercial Environmental Laboratories
- Municipal and Industrial Non-Commercial Environmental Laboratories
- List of Approved Laboratories for Legionella Testing
- In-state lead testing laboratories
- Connecticut Approved Laboratories Certified to Test Perfluorooctanesulfonic acid (PFOS) and Perfluorooctanoic acid (PFOA)
- Initial Lab Application
- Renewal Lab Application
- Application for Approval of Environmental Laboratory Director
Laws and Regulations
- General Statute Sec. 19a-29a
- General Statute 25-40
- Public Health Code Section 19-4-1
- Public Health Code Sections 19a-36-A25 to A33
- Public Health Code Sections 19a-36-a57 to a63
Lab Advisory Committee Minutes
- Circular Letter 2015-05 2015 Proficiency Test Study Update
- Circular Letter 2010-66 - 2011 Proficiency Testing for PCBs in Oil
- Proficiency Testing Schedule and Evaluation
- Proficiency Testing for Chemistry and Microbiology
Analytes and Matrices
- Drinking Water
- Wastewater
- Solid Waste
- Animal and Plant Tissues
- Construction, Renovation and Demolition Building Materials
Miscellaneous Information
- EHDW Circular Letter 2024-18 - Drinking Water Volatile Organic Method Field Reagent Blank
- EHDW Circular Letter 2024-14 - Method Detection Limit (MDL) Guidance
- EHDW Circular Letter 2024-07 - Approved Standard Methods for Analysis Under the SDWA
- EHDW Circular Letter 2023-24 - Drinking Water Action Level for Six Per- and Polyfluoroalkyl Substances (PFAS)
- EHDW Circular Letter 2023-20 - SW846 Compendium update
- EHDW Circular letter 2023-14 - Certification of PFAS in non-potable water
- EHDW Circular Letter 2023-08 - Analysis of Aroclors by Drinking Water Methods 505 and 508
- EHDW Circular Letter 2022-81 - Certification of EPA Method 533
- EHDW Circular Letter 2021-82 - 24-Hour Notification Requirement for Test Results Showing Contaminants
- EHDW Circular Letter 2021-84 - Tenant Notification Requirement
- Circular Letter: 2021-37 - Field Reagent Blanks for Drinking Water Methods 537.1 and 537 rev. 1.1
- CDC Legionella Method
- Policy Concerning Trip Blanks for VOCs Sampling (Circular Letter 2015-27)
- Determination of the Method Detection Limit (MDL) (Circular letter 2021-5)
- Action Levels for Private Wells
- General Permit for Discharge of Storm Water (Circular Letter 2012-15)
- Volatile Organic Chemicals analysis by EPA Methods 524.2 & 524.3 (Circular Letter 2011-18)
- Connecticut ETPH Method
- Microbiological Methods for Analyzing Recreational Water
- Radon Sample Collection for Water
- New England States' Sample Collection & Preservation Guidance Manual for Drinking Water - version 5.0 January 2015
- Related Links
- Minimum Air Sample Collection (Circular Letter 2014-20)
- PCM QC Requirements
- Lab Analyzing in the Field for Asbestos by PCM (Circular Letter 2013-66)
- Certification Changes for 2005 (Circular Letter 2004-8)
- CT Available NIOSH Equivalent Courses
Environmental Laboratory Certification Program
410 Capitol Avenue, MS# 11LAB
PO Box 340308
Hartford, CT 06134
Tel: 860-509-7389
Email: DPH.ELCP@ct.gov