Laboratory Accreditation Program
What's New?
- December 16, 2020 - Replaced “Notice to DW Microbiology Laboratories RE: SDWA Microbiology Results” with “SDWA Microbiology Results and Reporting (12/9/2020)” under the Compliance Assistance heading.
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November 16, 2020 – Added Notification of Cyanotoxin Accreditation under the Compliance Assistance heading.
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October 27, 2020 - The Laboratory Accreditation Advisory Committee December 1, 2020 meeting materials are available on the committee webpage.
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October 19, 2020 – ASDWA Technical Bulletin to Laboratories Reporting PFAS Analysis Using EPA Methods 533, 537, or 537.1 added under the Procedures & Methods heading.
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August 31, 2020 – Updated: NELAP Accreditation FAQ, Rev. 2.1, and is available under the Compliance Assistance heading.
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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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