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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: 10LL

1,1,1-Trichloroethane 10 ug/mL in P&T Methanol

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  • Brand NSI
  • Matrix P&T Methanol
  • Concentration 10 ug/mL
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 10L

1,1,1-Trichloroethane 200 ug/mL in P&T Methanol

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  • Brand NSI
  • Matrix P&T Methanol
  • Concentration 200 ug/mL
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1094-HA

Simazine

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1094H

Simazine

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1091-M

Dalapon

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 1091H-M

Dalapon

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 10-9-1

Calcium at 10 µg/mL in 2% HNO3 (100 mL)

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  • Brand HPS
  • Matrix 2% HNO3
  • Concentration 10 µg/mL
  • Raw Material Five 9s as available; no purification
  • Certification Single: Gravimetric w/ICP Confirmation
SKU: 1090-HA

Atrazine

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  • Brand NSI
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 108M

Arochlor 1248 1000ppm in Methanol

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  • Brand NSI
  • Matrix Methanol
  • Concentration 1000ug/mL
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 108L-T

Arochlor 1248 50ppm in Oil

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  • Brand NSI
  • Matrix Hemp Oil
  • Concentration 50ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 108L

Arochlor 1248 50ppm in Hexane

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  • Brand NSI
  • Matrix Hexane
  • Concentration 50ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
SKU: 108H-T

Arochlor 1248 500ppm in Oil

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  • Brand NSI
  • Matrix Hemp Oil
  • Concentration 500ppm
  • Raw Material >95% min
  • Certification Gravimetric and/or Volumetric
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