Pool pH levels chart
What are ideal pool levels?
Ideal pool levels are:
Chlorine: 1–3 ppm
pH: 7.2–7.6
Alkalinity: 80–120 ppm
Calculate Your Levels
Direct answer: Aim for about 7.2–7.6 pH in most pools. Below ~7.0 trends corrosive; above ~7.8 sanitizer performance and comfort often suffer—move in small steps and retest after circulation.
pH bands (table)
| Band | pH range | Typical effect |
|---|---|---|
| Too low | Under 7.0 | Corrosion, aggressive water, eye sting |
| Target | 7.2–7.6 | Balanced comfort + chlorine performance |
| Creep high | 7.7–7.9 | Scaling risk, dull sanitizer feel |
| Too high | Above 8.0 | Scale, cloudy tendency, weak disinfection |
Why pH matters for chlorine
Chlorine exists in different forms depending on pH. When pH drifts high, a larger share may be less active for disinfection even if your “ppm number” looks fine. Fixing pH first often fixes mysterious chlorine demand faster than endlessly raising sanitizer.
Use the pool pH calculator with accurate gallons so acid or base doses match your water volume—overshooting wastes chemicals and time.
Calculate pH dose
Last updated: April 2026