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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

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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.

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SKU: PEO-002

Trihalomethanes Drinking Water Organic Standard (2 pack)

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  • Brand NSI
  • Matrix PT Methano
  • Certification Single: Grav. w/Analytical Confirmation
SKU: PEO-001

Carbamate Pesticides Drinking Water Organic Standard (2 pack)

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  • Brand NSI
  • Matrix Methanol
  • Certification Single: Grav. w/Analytical Confirmation
SKU: PEI-199

FOGs by IR Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: PEI-198

Salinity Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
SKU: PEI-197

Low Level Fluoride Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
SKU: PEI-195

Nitrate Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
SKU: PEI-194

Perchlorate - Whole Volume Drinking Water Inorganic Standard

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
SKU: PEI-193

Fluoride Drinking Water Inorganic Standard

  • CCL
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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/IC Confirmation
SKU: PEI-192

Dissolved Oxygen Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: PEI-191

Ignitability Wastewater PT Standard, 110 mL bottle

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Gravimetric and/or Volumetric
SKU: PEI-180

Uranium Wastewater PT Standard (2 pack)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Gravimetric w/ICP Confirmation
SKU: MIC-QC6B

MIC-QC6B - Drinking Water Quantitative Coliforms - Blind

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  • Brand NSI
  • Certification Cultural based enumeration
  • Raw Material <2 passages from primary culture
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