Last checked: October 22, 2026

Private well vs. city water: pros, cons and costs

The biggest difference between a private well and city water isn't the taste or the bill. It's who is responsible. A public water system has to test its water and report the results under federal rules. With a private well, that job is yours. Here's how the two compare, with the published cost figures we could verify.

The short version

What counts as "city water"

EPA defines a public water system as one that provides piped water for human consumption to at least 15 service connections, or that serves an average of at least 25 people for at least 60 days a year. It can be publicly or privately owned. EPA says systems regulated by EPA and delegated states and tribes provide drinking water to 90% of Americans.⁵

That's why a small neighborhood or mobile-home-park system can count as "public" even though it's privately run, while a single home's well doesn't.

Pros and cons of city water

Pros

• Federal standards and testing. Public systems have to meet EPA's health-based standards.¹
• An annual report. Your Consumer Confidence Report lists the water source, a summary of contamination risk to the source, the regulated contaminants found, and their potential health effects.⁴ You can find yours with EPA's CCR search tool or by calling the water supplier.⁴
• No equipment to maintain on your property for the supply itself.

Cons

• A bill every month or quarter. EPA WaterSense says the average family spends more than $1,000 a year on water costs.⁶
• Less control. You don't choose how the water is treated. If you want something different, you'd add your own treatment (see whole-house vs point-of-use).
• Not available everywhere. USGS says private wells are used in areas outside public water supply service areas.⁷

Pros and cons of a private well

Pros

• No water bill from a utility. You pay instead for the pump's power and for upkeep.
• Your own supply. You're not affected by a utility's service interruptions or rate changes, though you take on the risks below.
• Available in rural areas where there's no public main. That's the main reason homes are on wells; see why so many households use wells.

Cons

• Testing and fixing are on you. EPA says private well owners are responsible for their own drinking water,² and it cites a USGS study in which about one in five of roughly 2,100 private wells had at least one contaminant above a human-health benchmark.²
• The pump needs power. Groundwater has to be pumped up using a power source, usually electricity.⁸ Illinois Extension notes that an extended power outage may shut off the pump, and that a backup generator must be big enough to run it and should be installed by a qualified electrician.¹⁵
• Quantity isn't guaranteed. USGS says pumping too much too fast can make a well yield less or run dry, and that dug wells can go dry in droughts.⁹¹⁰
• Floods and nearby activities can affect it. EPA recommends testing after floods and when there are known problems or activities nearby.³ See Well flooded? What to do.
• Equipment wears out. The pump, pressure tank and switch need checking and eventually replacement. See how a private well works.

What a private well costs: published figures

We use only figures from government, university or professional-association sources, with their dates. None of them is a quote for your home.

Testing

EPA says your local health department may offer private well testing for free.³ More fees are in our testing cost guide.

Drilling a new well and the pump

The National Ground Water Association's Well Owners Guide (2021), distributed by University of Maryland Extension, cites "recent survey data":¹⁴

• Drilling: about $24 per foot for a 4-inch well and about $30 per foot for a 6-inch well. Its examples: a 120-foot 4-inch well would cost $2,880 to drill, and a 220-foot 6-inch well $6,600.
• Pumps: a typical household submersible pump at $3,000–$3,200, and a typical jet pump at about $1,545–$1,570.
• Other charges can include casing, grout, the cap, a screen, test pumping, disinfection, the water line to the house and the pressure tank.

NGWA is a trade association, and it says these figures are a general indication, not exact costs for any area, and that costs vary over time and by location. It recommends asking for an itemized list of charges rather than a lump sum.¹⁴ Illinois Extension's well-planning checklist also suggests getting a written estimate that covers the cost of "dry" holes and the drilling permit.¹⁵

Treatment, if you need it

• NGWA says capital costs for the most common home treatment systems generally range from less than $100 to $3,000 or more, with whole-house systems toward the higher end.¹⁴
• UGA Extension estimates about $4,000 installed for a radon aeration system and about $1,000 for a granular activated carbon system.¹⁶

Which costs more?

We haven't found an official source that compares lifetime costs of a well against city water, and the answer depends on depth, geology, local utility rates and what (if anything) your water needs treated for. To compare for a specific house:

1. Ask the utility for its rates and, if you're considering connecting, any connection or hookup fees.
2. For a well, get itemized written quotes from licensed well contractors, and budget for annual testing.
3. If you're buying a home with a well, see Buying a home with a well for tests, flow checks and contract wording.

Related guides

• Why do so many U.S. households use private wells?
• How a private well works
• Who regulates private wells?
• How much does well water testing cost?
• Whole-house vs. point-of-use treatment
• Buying a home with a well