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Environmental Certified Reference Materials and Proficiency Test Standards

Our wastewater standards enhance your testing accuracy and efficiency. Regular use of our certified reference materials (CRMs) and proficiency test (PT) standards ensures high data quality and supports accreditation needs.

We specialize in ISO-accredited CRMs and effluent standards that are stable and integrate seamlessly into routine workflows. Pre-measured, single-use materials help prevent errors and simplify processes. For example, try our GGA Concentrate Snips™: just snip and pour into a 300 mL BOD bottle—no measurements or contamination. Our versatile, multiparameter CRMs streamline testing procedures, reducing the need for multiple CRMs in your lab. Watch the demonstration video to learn more!

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DMRQA Set 2 DMRQA Set 2
SKU: QCI-084K

DMRQA Set 2

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  • Brand NSI
  • Certification Single: Grav. w/Analytical Confirmation
  • Raw Material >95% min; as available
Universal Wastewater CRM Universal Wastewater CRM
SKU: QCI-084

Universal Wastewater CRM

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  • Brand NSI
  • Matrix Water
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
DMRQA Set 1 DMRQA Set 1
SKU: QCI-083K

DMRQA Set 1

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Full DMRQA Set Full DMRQA Set
SKU: QCI-082K

Full DMRQA Set

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  • Brand NSI
  • Certification Single: Grav. w/Analytical Confirmation
  • Raw Material >95% min; as available
GGA Concentrate Snips™ GGA Concentrate Snips™
SKU: QCI-081SNIP

GGA Concentrate Snips™

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  • Brand NSI
  • Concentration 300 mg/L
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Residue CRM Residue CRM
SKU: QCI-079

Residue CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Oil & Grease - Ready To Use Reference Material (4 x 1000 mL) Oil & Grease - Ready To Use Reference Material (4 x 1000 mL)
SKU: QCI-069C

Oil & Grease - Ready To Use Reference Material (4 x 1000 mL)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Oil & Grease - Ready To Use Reference Material Oil & Grease - Ready To Use Reference Material
SKU: QCI-069

Oil & Grease - Ready To Use Reference Material

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Complex Nutrients QC CRM Complex Nutrients QC CRM
SKU: QCI-064

Complex Nutrients QC CRM

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  • Brand NSI
  • Raw Material >95% min
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients QC CRM (4 x 500 mL) Simple Nutrients QC CRM (4 x 500 mL)
SKU: QCI-063C

Simple Nutrients QC CRM (4 x 500 mL)

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Simple Nutrients QC CRM Simple Nutrients QC CRM
SKU: QCI-063

Simple Nutrients QC CRM

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  • Brand NSI
  • Raw Material >95% min; as available
  • Certification Single: Grav. w/Analytical Confirmation
Demand - Ready To Use Reference Material (4 x 1000 mL) Demand - Ready To Use Reference Material (4 x 1000 mL)
SKU: QCI-062C

Demand - Ready To Use Reference Material (4 x 1000 mL)

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