Owning a swimming pool is a dream for many homeowners, but one of the main concerns is the cost of filling it with water. Whether you’re planning to install a new pool or refill your existing one, understanding the expenses involved will help you budget accordingly. But how much does it cost to fill a pool with water? Let’s dive into the details and find out how you can manage costs while keeping your pool in top shape.

Factors That Affect Pool Filling Costs
The cost of filling your pool depends on several factors. Below, we’ll examine some of the major elements that influence pricing.
1. Pool Size and Volume
The most important factor in determining how much does it cost to fill a pool with water is its size. The larger the pool, the more water you need, and the higher the cost.
2. Water Source
You have multiple options when it comes to filling your swimming pool:
- City Water: If you’re using municipal water, your bill will include standard water usage rates plus any sewer or service fees.
- Well Water: If you have a private well, you may avoid water costs, but you must ensure your well can handle the high usage.
- Delivery Services: Some homeowners opt for water delivery trucks, which can be more expensive but also more convenient.
3. Water Rates in Your Location
Water rates vary significantly depending on your city or state. Some regions charge more per gallon, which will directly impact your total cost.
4. Evaporation and Water Waste
Water loss due to evaporation, leaks, or excessive splashing means you’ll need to refill your pool more frequently, increasing costs.
How to Calculate the Cost of Filling a Pool
To estimate how much does it cost to fill a pool with water, follow these steps:
Step 1: Determine Your Pool’s Volume
Use this formula to calculate your pools water capacity in gallons:
Rectangular Pools: Length x Width x Average Depth x 7.5
Round Pools: Diameter x Diameter x Average Depth x 5.9
Step 2: Check Your Local Water Rates
Most municipalities charge per 1,000 gallons. Check your latest water bill to find your rate.
Step 3: Multiply Volume by Rate
Once you have your pools volume and the cost per gallon of water, multiply them to get the total cost.
Average Cost to Fill a Pool with Water
To better understand the expenses, let’s look at some rough cost estimates:
- Small Pool (10,000 gallons): $40-$80
- Medium Pool (20,000 gallons): $80-$160
- Large Pool (30,000 gallons): $120-$240
Keep in mind that prices may vary depending on factors like location and additional fees.
Ways to Save on Pool Filling Costs
Here are some effective ways to reduce the cost of filling your pool:
- Use a pool cover to reduce evaporation.
- Collect rainwater if permitted in your area.
- Monitor for leaks to avoid unnecessary water loss.
- Fill your pool at off-peak times when water rates are lower.
- Consider alternative water sources like well water.
Other Pool Maintenance Costs
Aside from filling costs, here are some related expenses you should consider:
1. Pool Liner Replacement
Replacing a pool liner can bring additional water expenses. Learn more about pool liner installation.
2. Replastering Costs
If your pool needs replastering, you may have to drain and refill it. Learn the cost of replastering a pool.
3. Pool Pump Electricity Usage
Running your pool pump affects water circulation and maintenance costs. Curious about electricity consumption? Check out pool pump electricity usage.
4. Pool Opening Expenses
Opening your pool after winter requires refilling and chemical treatments. Here’s a guide on how to open a pool.
Does a Pool Add Value to Your Home?
Many homeowners wonder if investing in pool maintenance and water costs is worth it. Find out from this pool value guide.

FAQs
1. Is it cheaper to fill a pool with a hose or water delivery service?
Using a hose connected to city water is usually cheaper than hiring a water delivery service. However, delivery services can be faster and more convenient.
2. How long does it take to fill a pool?
Filling a pool with a garden hose can take anywhere from 12 to 48 hours, depending on the size of the pool and water pressure.
3. Can I use well water to fill my pool?
Yes, but ensure your well has enough capacity and test the water quality since well water often contains minerals that may require additional pool treatment.
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