Discharge from these lagoons into groundwater caused nitrate levels to skyrocket in the drinking water of small towns in the Lower Yakima Valley, where many residents get their water from private ...
A typical test strip will measure nitrate levels from 1 to 50 parts per million (ppm) and nitrite levels from 0.15 to 3.0 ppm. Any concentration of nitrates in a water source may be cause for concern.