DSTNZ uses Canterbury Health Laboratories (CHL) for confirmatory drug testing. chl.co.nz DSTNZ uses ESR for confirmatory drug testing, and for hair sample analysis as requested. esr.cri.nz DSTNZ is proudly accredited through International Accreditation New Zealand (IANZ). ianz.govt.nz DSTNZ recommends NZL Drug Testing for all your drug testing needs in the wider Auckland region. nzldrugtesting.co.nz Direct … Continue reading Professional affiliations