Accurate instrumentation keeps our results dependable.

Providing environmental testing services to the entire Wisconsin area, Commercial Testing Laboratory’s accurate testing data is supplied in an efficient and timely manner. Our Environmental Laboratory provides testing for a variety of water samples. Current certifications are held for DNR and state agencies. Highly sophisticated instrumentation keeps us at the forefront of testing technology.

Visit the State of Wisconsin DNR Website (see links) for an updated list of our Laboratory Certifications:

Look for our Laboratory ID: #617013980
    Department of Natural Resources – Certified Laboratories
           Certified Lab – Chemistry (Waters, Solids, Drinking Water)  (.pdf  /  Page 9)
           Drinking Water Certified – Chemistry – NR 809 and NR 812 (.pdf  /  Page 3) 
           Drinking Water Certified Labs – Nitrate, Nitrite, Nitrate + Nitrite, and Arsenic – NR 809 and NR 812  (.pdf  /  Page 2)

Types of Environmental Samples:

• Drinking Water
  • Coliform Bacteria
  • Nitrate
  • Nitrite
  • Iron
  • Hardness
  • pH
  • Lead
  • Arsenic
• Ground Water
• Waste Water
  • BOD
  • TSS
  • Ammonia
  • Phosphorous
  • Nitrogens
  • Metals
• Sludge/Solid Waste
• Industrial Water

Certified by the State of Wisconsin Department of Natural Resources  DNR 2024-2025  which includes (Safe Drinking Water Act) SDWA 2024 –  Wisconsin Department of Agriculture. 

These are just a few of the testing services we offer! We can accommodate any size order. CTL has route services available within a 90 mile radius of Colfax covering 15 counties.

Email or call today to order a test kit
Lab@ctlcolfax.com

Or call us at 715-962-3121