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.
Even Low Levels of Arsenic in Drinking Water Raise Kidney Cancer Risk Dec. 2, 2024 — New research findings indicate that exposure to even low levels of arsenic poses significant health risks ...