Skip to Main Content

Select country

Select your country

Scheduled Proficiency Testing & PT Express™ for Environmental Testing

  • Certified for environmental methods — plate counts, MPN
  • COA includes expected values for multiple methods
  • Robust — lyophilized technique ensures strong recovery, even for 44.5 ºC coliform methods
  • Unique — multi-organism CRM covers six methods in a single pellet

Search by Category

DMRQA

The Discharge Monitoring Report-Quality Assurance Study Program (DMRQA) plays a critical role in monitoring compliance with environmental regulations, ensuring the accuracy of data, identifying trends and patterns, and promoting transparency and accountability in environmental management.

Drinking Water Standards

NSI offers a wide range of Certified Reference Materials (CRMs) for drinking water analysis to ensure environmental and human health. Offerings include testing standards for pH, residual free chlorine, turbidity, trace metals, mercury, fluoride, and nitrite.

Legionella

Legionella certified reference materials are crucial for ensuring the accuracy and reliability of testing methods used to detect the presence of Legionella bacteria in water systems.

Soil/UST Standards

Soil and Underground Storage Tank (UST) standards are fundamental regulations established to preserve the environment and human health from hazards associated with underground storage tanks.

Wastewater Standards

Wastewater analysis is a powerful public and environmental health tool. We are laser-focused on manufacturing and delivering unique ISO-accredited Certified Reference Materials (CRMs) that are not only stable but also easy to use and implement.

Categories and filters

Filter / Sorting

Categories

Brand

Accreditations

Product Type

Regulatory Method

Instrument / Test

Analyte - Single / Multi

CAS #

Analyte / Component

222 Items found

Per Page:
Sort by:
Texas TPH in Water - Blind Texas TPH in Water - Blind
SKU: TX-1005WQCB

Texas TPH in Water - Blind

Login to view pricing
  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Matrix Water
  • Raw Material >95% min; as available
Texas TPH in Water Texas TPH in Water
SKU: TX-1005WPT

Texas TPH in Water

Login to view pricing
  • Brand NSI
  • Matrix Water
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Texas TPH in Soil - Blind Texas TPH in Soil - Blind
SKU: TX-1005SQCB

Texas TPH in Soil - Blind

Login to view pricing
  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Raw Material >95% min; as available
PCB in Transformer Oil - Blind PCB in Transformer Oil - Blind
SKU: SQCO-072B

PCB in Transformer Oil - Blind

Login to view pricing
  • Brand NSI
  • Matrix Transformer Oil
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
TOX in Soil - Blind TOX in Soil - Blind
SKU: SQCO-038B

TOX in Soil - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Organophosphorus Pesticides - Blind Organophosphorus Pesticides - Blind
SKU: SQCO-021B

Organophosphorus Pesticides - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Nutrients in Soil - Blind Nutrients in Soil - Blind
SKU: SQCO-019B

Nutrients in Soil - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
TCLP Pesticides - Blind TCLP Pesticides - Blind
SKU: SQCO-015-PEST-B

TCLP Pesticides - Blind

Login to view pricing
  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Raw Material >95% min; as available
TCLP Herbicides - Blind TCLP Herbicides - Blind
SKU: SQCO-015-HERB-B

TCLP Herbicides - Blind

Login to view pricing
  • Brand NSI
  • Certification Grav &/ Volumetric w/analytical confirmation
  • Raw Material >95% min; as available
TCLP Base/Neutrals - Blind TCLP Base/Neutrals - Blind
SKU: SQCO-015-BNB

TCLP Base/Neutrals - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
Chlordane in Soil - Blind Chlordane in Soil - Blind
SKU: SQCO-009B

Chlordane in Soil - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
VOCs in Soil - Low Level - Blind VOCs in Soil - Low Level - Blind
SKU: SQCO-008LB

VOCs in Soil - Low Level - Blind

Login to view pricing
  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Grav &/ Volumetric w/analytical confirmation
AlertAlertBrowse fileDownload fileFileImagePdfWordTextExcelPowerpointArchiveCsvAudioVideoSpinnerCalendarReturn arrowMinusVisibleInvisibleVisibleInvisibleConfigure