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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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SKU: 53-M

Naphthalene

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: HPCQC

HPC Control (5-500)

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  • Brand NSI
  • Certification Cultural based enumeration
  • Raw Material <2 passages from primary culture
SKU: 53-A

Naphthalene

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53820-M

Azinphos methyl

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53820-HA

Azinphos methyl

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53820-A

Azinphos methyl

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 536L

Vinyl chloride

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 536H

Vinyl chloride

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53520-HA

Fenthion

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53520-H

Fenthion

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53500-HA

Fensulfothion

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 53480-M

Fenitrothion

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
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