Laboratory Accreditation Program
What's New?
- June 30, 2022 – Upon “Environmental Laboratory Accreditation Proficiency Test Study Requirements” Notice published in the Pennsylvania Bulletin Volume 52 Issue 25, Saturday, June 18, 2022, the four Fields of Proficiency Testing documents under the Proficiency Testing (PT) heading have been updated.
- June 16, 2022 – New Rev. 6/2022 for Part 1 – Initial/Renewal Application is now available. Please ensure you submit application using the current revision.
- May 25, 2022 – Revision 2 of the Traceability of Measurements document (G019) is now available under the Compliance Assistance heading.
- March 17, 2022 - New Rev. 3/2022 for Request to Report Qualified Drinking Water Sample Results is now available. Please ensure you submit request using the current revision.
Forms & Applications
Proficiency Testing (PT)
Procedures & Methods
Compliance Assistance
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Coliform Density Calculation FAQ (11/2008) (PDF)
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Corrective Action Report FAQ, Rev. 1 (PDF)
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Distillation Variance Approval Extension Letter (04/27/2012) (PDF)
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Guidelines for Sample Collection, Receipt, and Handling
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Instructions for Environmental Laboratories Seeking Accreditation from the PA-DEP, Rev. 0 (PDF)
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Limited Use ATP Approval Application FAQ, Rev. 0 (PDF)
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Memo to All Accredited Labs RE: Env. Lab Accreditation Regs, Chapter 252 (PDF)
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Memo to DW Accredited Laboratories RE: SDWA Reporting and Notification Requirements (12/7/2017) (PDF)
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Microbiology Incubation Units
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NELAP Accreditation FAQ, Rev. 2.1 (PDF)
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SDWA Microbiology Results and Reporting (12/9/2020) (PDF)
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Notification of Cyanotoxin Accreditation (09/16/20) (PDF)
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On-Site Assessment Guidance, Rev. 2 (PDF)
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Proficiency Testing (PT) Guidance for Laboratories Rev. 5 (PDF)
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Required Documentation for PA State (Chapter 252) Accreditation, Rev. 5 (PDF Only)
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SDWA Composite Analysis FAQ, Rev. 0 (PDF)
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Traceability of Measurements (PDF)
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Writing a Quality Manual for PA State (Chapter 252) Accreditation Rev. 8 (PDF)
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Writing an Analytical SOP for PA State Accreditation, Rev. 3 (PDF)
Search Environmental Laboratories
PA State Regulations
The NELAC Institute (TNI)
Related Information
Contact Us
Mailing and Physical Addresses
US Postal Service :
Department of Environmental Protection
Bureau of Laboratories
Attn: Laboratory Accreditation Program
PO Box 1467
Harrisburg, PA 17105-1467
Other modes of delivery (UPS, Fed Ex, etc):
Department of Environmental Protection
Bureau of Laboratories
Attn: Laboratory Accreditation Program
2575 Interstate Drive
Harrisburg, PA 17110-9332