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Water Screen (Nitrates, pH, Total dissolved solids or TDS, sulfates)

Preferred Sample

Water (50 ml minimum, 250 ml preferred)




Days Tested


Turnaround Time

1-2 days


Screen for nitrates, pH, total dissolved salts (TDS), and sulfates by spectroscopy, gravimetric, and other additional methods.

Shipping Requirements

The sample may be stored in the fridge, but an ice pack during shipping is not required. No time restrictions on sample viability, but typically water should be analyzed within a few days

Additional Instructions

Sample water in a clean, plastic container; rinse several times using water source before sampling. See Water Collection and Submission Guide, Nitrate Poisoning of Livestock, and/or Livestock Water Quality for additional information. Analysis of water for animal and livestock consumption only. Analysis of water for human consumption must be performed by a laboratory certified by the North Dakota Department of Health.