New Hampshire Environmental Laboratory Accreditation Program, NH ELAP, is currently accrediting environmental laboratories according to the July 2003 edition of the National Environmental Laboratory Accreditation Conference (NELAC) Standards.

NH ELAP conducts On-Site Assessments of the laboratories, which are granted primary accreditation. Accreditation is based upon the results of the assessment and the results of the laboratory's participation in proficiency test studies. Laboratories granted secondary accreditation by NH ELAP are assessed by other NELAP recognized accrediting authorities using the NELAC Standards. Secondary Accreditation is based upon the accreditation granted by the Primary Accrediting Authority.