Side-by-Side Comparison
Outdoor Living
Pool Water Chemistry vs. Swimming Pool Dimensions & Volumes
Comparing 2 standards across 16 specifications. 16 key differences identified.
Comparing:
Pool Water Chemistry
Swimming Pool Dimensions & Volumes
Residential swimming pool water chemistry standardizes balance parameters: pH 7.2–7.8 (ideal 7.4–7.6 matching human eyes), Free Chlorine 1.0–3.0 ppm, Total Alkalinity 80–120 ppm, Calcium Hardness 200–400 ppm, and Cyanuric Acid stabilizer 30–50 ppm.
Swimming pool dimensions and water volumes are standardized by World Aquatics (formerly FINA) and residential building codes into Olympic Long Course (50.0 × 25.0 × 2.0 m / 2.5 million liters / 660,000 gallons), Short Course (25.0 m / 25.0 yards), and standard residential rectangular sizes (12×24 ft to 20×40 ft).
Specification Comparison Table
16 Parameters| Parameter / Spec | ||
|---|---|---|
|
Governing Standards
|
ANSI/APSP-11 / CDC Healthy Swimming Guidelines | World Aquatics (FINA) Facility Rules FR 2 / ISPSC / USA Swimming Rules |
|
pH Level (Ideal)
|
7.4 to 7.6 (Acceptable: 7.2–7.8 | Matches human mucous membrane pH 7.4) | — |
|
Free Available Chlorine (Pool)
|
1.0 to 3.0 ppm (parts per million) | — |
|
Free Chlorine (Hot Tub / Spa)
|
3.0 to 5.0 ppm (Higher due to hot water organic load) | — |
|
Combined Chlorine (Chloramines)
|
0.0 to 0.2 ppm max (Values >0.4 ppm require shock treatment) | — |
|
Total Alkalinity (TA)
|
80 to 120 ppm (Buffers against rapid pH bounce) | — |
|
Calcium Hardness (Plaster)
|
200 to 400 ppm (Prevents plaster etching and metal heater corrosion) | — |
|
Cyanuric Acid (CYA / Stabilizer)
|
30 to 50 ppm (Shields chlorine against UV degradation; >100 ppm causes lock) | — |
|
Langelier Saturation Index (LSI)
|
-0.3 to +0.3 (Balanced water: negative = corrosive, positive = scaling) | — |
|
Olympic Long Course (50m)
|
— | Length: 50.00 m (164.04 ft) | Width: 25.00 m (82.02 ft) | Depth: 2.00 to 3.00 m | 10 Lanes (2.5 m width each) |
|
Olympic Pool Water Volume
|
— | Exact: 2,500,000 Liters (2,500 m³) = ~660,430 US Gallons (5.51 million lbs of water) |
|
Short Course Metric (25m)
|
— | 25.00 m × 21.00 m (or 25.00 m) | Depth: 2.0 m minimum | ~1,050,000 Liters (277,000 Gallons) |
|
Short Course Yards (25yd / SCY)
|
— | 75.00 ft (22.86 m) × 60.00 ft | Standard US high school and NCAA collegiate competition pool |
|
Residential Small (12 × 24 ft)
|
— | Average depth 4.5 ft | ~9,700 to 10,800 US Gallons (~36,700–40,800 Liters) |
|
Residential Medium (16 × 32 ft)
|
— | Average depth 5.0 ft | ~19,200 to 21,500 US Gallons (~72,700–81,400 Liters) |
|
Residential Large (20 × 40 ft)
|
— | Average depth 5.5 ft | ~33,000 to 36,000 US Gallons (~125,000–136,000 Liters) |