What Is CCF on a Water Bill? (Cubic Feet Explained)

Quick Answer

CCF means "hundred cubic feet" — 1 CCF equals 748 gallons of water. CCF is the volume unit your bill uses; the fee comes from the rate your utility charges per CCF. Compare your own bill history and the billing-period length before treating any usage jump as a leak.

Next step: Now that you know what CCF means, check your water meter’s leak indicator to see if a hidden leak is driving up your usage, or see how sewer charges work to understand how your CCF number affects your total bill.

Got the definition? Good — now the part most people miss: what your CCF number reveals about your bill. Once you know your CCF, you can tell in about 30 seconds whether your usage is normal or whether water (and money) is quietly leaking. Two things to know up front:

• Compare like with like. Use the same month and billing-period length from last year before deciding that your usage is unusual.
• Your CCF also drives your sewer charges — so one high number raises both bills.

Run the 30-second check in "Is your CCF normal?" below, or jump straight to finding a leak.

What does CCF mean on a water bill?

If you opened your water bill and saw "CCF," you are not alone. It is one of those utility terms that feels obvious to the utility and totally unclear to everyone else.

Here is the simple definition: CCF means "hundred cubic feet." The first "C" is the Roman numeral for 100, and "CF" means cubic feet. It is a unit of volume — how much water flowed through your meter during the billing period.

This article gives you a plain-English conversion you can trust, plus a quick way to connect your CCF number to what you actually pay. Since many sewer charges are calculated from your CCF usage, understanding this unit helps you track both your water and sewer costs.

For help understanding other parts of your bill beyond usage, check out our guide on water service charges. If you want the big picture first, start with our Water Service Explained pillar.

CCF vs cubic feet vs gallons (and why bills use different units)

Utilities measure water in volume. The most common units you'll see are gallons, cubic feet (ft³), and CCF.

• 1 cubic foot = 7.48 gallons
• 1 CCF = 100 cubic feet ≈ 748 gallons (100 × 7.48 gallons per cubic foot; EPA states "One CCF is equal to 748 gallons"[1])

So if your bill says you used 6 CCF, that is about 4,488 gallons (6 × 748).

Some cities use kgal (thousand gallons) instead. The important thing is that the unit is just a way to count volume — it does not change the actual amount of water you used. However, some utilities apply tiered water rates, where the price per CCF increases as your usage goes up.

Quick conversions you can memorize

If you want a quick mental shortcut, these are the most useful:

The goal isn't perfect math. The goal is being able to look at your bill and compare the same unit across billing periods. A sudden change that cannot be explained by weather, guests, irrigation, or the length of the billing period is a reason to check for a leak.

How CCF turns into charges on your bill

Once your utility has a usage number, it applies local rates. That rate structure can be simple or complicated depending on where you live.

Flat-rate pricing

With a flat rate, each CCF costs the same. Your usage charge is basically: CCF × rate. Use the rate printed on your own bill; fixed service fees, sewer, and stormwater charges may be separate.

Tiered pricing

With tiers (block pricing), the first chunk of usage is cheaper and later chunks are more expensive. That can make it look like your "price per unit" changed month to month, even though the tiers themselves are fixed. See our guide to tiered water rates for how the blocks work.

If your bill also includes sewer, your water usage may drive that charge too. See how sewer charges work for the plain-English model.

CCF only drives the usage part of your bill. Most bills also include a fixed water service charge, and many add a separate stormwater fee for runoff — neither of which depends on your CCF.

Is your CCF normal? A 30-second check

The fastest way to build confidence is to connect three things: (1) your meter, (2) your bill, and (3) what your household is doing.

1) Compare the meter to the bill

Your bill lists a previous and current meter reading. Subtract to get usage. If you want the step-by-step, see how to read a water meter.

2) Check whether the jump makes sense

If your usage suddenly spiked, your next step is usually to rule out leaks — especially toilets. Our troubleshooting guide is a simple toilet leak test.

3) Use "normal" as context (not as a rule)

Households vary, but having a rough benchmark helps. See average water usage per person for a practical range. If your number is well above the typical band for your household size and nothing has changed about your routine, that is the point to start looking for a leak — not to assume the utility made a mistake.

Common misconceptions about CCF

• "CCF is water pressure." No — pressure is measured in psi. CCF is strictly volume.
• "CCF is a fee." CCF is the measurement. The fee comes from the rate applied to that measurement.
• "The utility is hiding gallons." Usually it's just a standard unit that's convenient for billing. CCF and gallons describe the same water; CCF is simply the unit your meter records in.

If you want the broader "why did this jump?" diagnosis, see why water bills suddenly increase.

Water Measurement Conversion Table

Next steps

• Convert your own CCF into gallons and dollars with the CCF calculator.
• Your CCF number looks high? Walk through why your water bill is so high — 11 checks ranked by likelihood.
• Suspect a leak? Check your meter’s leak indicator first — it takes two minutes.
• Curious how water usage becomes sewer charges? See how sewer charges work on your water bill.

This definition is part of the Water Explained hub. Billing vocabulary across all utilities lives in the utility glossary.

Sources

• EPA WaterSense: Understanding Your Water Bill — unit definitions; states “One CCF is equal to 748 gallons” (retrieved 2026-08-29).