3 Things to Know About Pool Chlorine Levels

Aim for 2–3 ppm free chlorine That range kills bacteria without irritating skin or eyes. Below 1 ppm is unsafe; above 4 ppm creates that strong chlorine smell, which actually means chlorine is breaking down contaminants.

Stabilizer reduces chlorine effectiveness If your water has cyanuric acid (CYA) at 30–50 ppm, chlorine works less effectively. Keep chlorine on the higher end of the 2–3 ppm range to compensate.

Test twice a week in summer Use cheap test strips. Regular testing prevents algae and keeps your pool safe.