Pool Chemistry Basics Every Desert Homeowner Should Know

You don't need a chemistry degree to keep a healthy pool, but understanding a few key numbers will save you money and headaches — especially with Arizona's notoriously hard water.

1. Free chlorine (1–3 ppm)

Your sanitizer. In the desert heat it burns off fast, so it needs frequent topping up.

2. pH (7.4–7.6)

Affects comfort, chlorine effectiveness, and equipment. Arizona water tends to drift high, which causes cloudiness and scaling.

3. Total alkalinity (80–120 ppm)

A buffer that keeps pH stable. Too low and pH bounces around; too high and it's hard to adjust.

4. Calcium hardness (200–400 ppm)

This is the big one in Arizona. Our water is naturally high in calcium, which causes scaling on tile and equipment if left unchecked.

5. Cyanuric acid (30–50 ppm)

Sunscreen for your chlorine. Critical under our intense sun — too little and chlorine vanishes; too much and it stops working.

The desert takeaway

Heat and evaporation move these numbers fast, which is why weekly testing matters more here than almost anywhere. Our chemical balancing service runs a full 7-point panel and tracks your pool's chemistry over time.