Buying a Home With a Private Well in Pinal County: What Your Lender Needs

Buying a home with a private well in Pinal County comes up once you get outside city water lines, whether it's acreage near Florence or a property out toward Casa Grande. A well doesn't stop you from getting a mortgage. It does add a few steps. Here's what lenders look for, how shared wells work, and the state paperwork that follows the sale.

Can I get a mortgage on a home with a private well in Pinal County?

Yes. Fannie Mae, FHA and USDA rules all allow homes served by a private well, as long as the property meets the program's standards. VA has its own property rules too. The details differ by loan type, so the well is one of the first things I ask about when you send me a listing.

What do lenders look for on a private well?

Conventional loans (Fannie Mae). Fannie Mae's Selling Guide (B4-1.3-04) says a property's utilities must meet community standards. Without public water, a community or private well must serve the home and be viable on an ongoing basis. A private well has to be on the property, unless there's a legally binding agreement for access to and maintenance of an off-site well. Fannie Mae's environmental hazards section (B4-1.4-08) adds that if a lender suspects the well water could be contaminated by a nearby hazardous waste site, getting a well certification is sound judgment.

FHA loans. HUD's Handbook 4000.1 (last revised August 12, 2026) has the most detailed rules. Water quality must meet the requirements of the health authority with jurisdiction, or EPA drinking water standards if there are no local or state standards. An existing home's well must deliver a continuous flow of at least three gallons per minute. More on FHA loans in Arizona is on my FHA page.

USDA loans. Under 7 CFR 3555.201, a privately owned water system can be acceptable if the lender decides it's adequate, meets applicable codes, and connecting to a public or community system isn't reasonable in cost or feasibility. USDA can also require inspections. See USDA loans in Arizona.

VA loans have their own water supply requirements. I'll check them for the specific home you pick.

What are FHA's well distance and testing rules?

For existing homes, HUD's handbook lists these minimum distances between the well and possible pollution sources. If the local authority requires more distance, the local rule wins.

From the well to	FHA minimum (existing home)
Property line	10 feet
Septic tank	50 feet
Drain field	100 feet (75 feet if the local authority allows it)

FHA requires a well water test for, but not limited to, homes that are newly built, where the appraiser reports problems with the well or water, where the water is reported or known to be unsafe for drinking, or that sit close to dumps, landfills, industrial sites, farms or other sites that could hold hazardous waste.

A disinterested third party has to collect and test the sample, such as the local health authority or a commercial testing lab. The buyer, seller or anyone else with an interest in the sale can't collect or carry it. The report can't be more than 180 days old on the day the loan funds. HUD also says homes with a mechanical chlorinator, or served by springs, lakes, rivers, sand-point wells or artesian wells, aren't eligible for FHA insurance.

Septic too? Read my post on septic inspections in Pinal County.

How do shared wells work with a home loan?

A shared well serves more than one home. ADWR says shared well agreements are a civil matter between the owners. No state agency regulates them, and ADWR doesn't resolve disputes about them.

Lenders still care. Fannie Mae wants a legally binding access and maintenance agreement when the well isn't on your lot. FHA says a shared well can serve no more than four homes, needs a shut-off valve on each home's line, and must supply each existing home at least three gallons per minute over a continuous four-hour period (or meet the handbook's storage alternative). FHA also lists more than 20 provisions the written agreement must include, such as:

• Binding on all owners and future owners, and recorded in the county deed records
• Easements for every part of the system, so owners can reach it for repairs and testing
• How costs are shared for the pump's power, repairs, testing and replacement
• Water testing allowed at any owner's request
• No new homes hooked up without everyone's consent
• Binding arbitration for disputes

Get a copy of the agreement early so there's time to fix gaps before closing.

What Arizona well paperwork comes with the sale?

Under A.R.S. 45-593(C), the registered well owner must tell ADWR about a change in ownership, and the new owner gives ADWR what it needs to keep the record current.

ADWR's real estate FAQ says form 55-71A, Request to Change Well Information, is filed when ownership of the property where the well physically sits changes. The fee is $30 per well, and the form needs a parcel map marking the well and a copy of the deed, so it's filed after the transfer, not before. If the well is on a neighbor's lot, you don't file one. ADWR keeps a registry only; it doesn't decide who legally owns a well.

• Open wells. A.R.S. 45-593(D) says within 30 days after you take ownership, you must notify ADWR in writing of any open well you discover on the property.
• Exempt wells. A.R.S. 45-454 covers "exempt wells": non-irrigation wells with a pump of no more than 35 gallons per minute. Domestic use includes watering less than two acres for plants used at home or for livestock feed. Inside an active management area, generally only one exempt well can serve the same use at the same location.

ADWR's Well Registry lists wells by the parcel they sit on, and a record may still show a past owner. In Pinal County, the Aquifer Protection (Septic & Wells) program looks over well permit applications on parcels 5 acres and smaller before sending them to ADWR.

What should I do before making an offer on a home with a well?

• Ask for the well registration number and look up the record on ADWR's Well Registry.
• Find out if it's shared. If it is, get the recorded agreement right away.
• Plan for testing. Even when your loan doesn't require it, you can order a water test yourself.
• Calendar the paperwork. File the 55-71A after closing. My Arizona Loan Status Update post explains the lender side of your contract timeline.

Shopping outside town? My Pinal County mortgage page covers the loan options I offer locally.

Frequently asked questions

Can I get an FHA loan on a house with a well in Arizona?

Yes, if the well meets HUD's rules. For an existing home, the well must deliver at least three gallons per minute continuously, water quality must meet local health standards (or EPA standards if there are none), and the well must meet HUD's minimum distances from septic tanks, drain fields and the property line.

Does FHA always require a well water test?

Not always. HUD requires a test for, but not limited to, new construction, homes where the appraiser reports well or water problems, water reported or known to be unsafe for drinking, and homes near dumps, landfills, industrial sites, farms or other hazardous waste sites. A required test can't be more than 180 days old when the loan funds.

Do I need to transfer a well with ADWR when I buy a home in Arizona?

If the well is physically on the property you're buying, yes. ADWR says to file form 55-71A, Request to Change Well Information, after the property transfers, with a parcel map, a copy of the deed and the fee.

How much does it cost to transfer a well in Arizona?

ADWR's real estate FAQ lists the cost as $30.00 per well.

Who regulates shared well agreements in Arizona?

No state agency does. ADWR says shared well agreements are a civil matter between the parties. Lenders still review them, and FHA lists specific provisions the agreement must contain.

What is an exempt well in Arizona?

Under A.R.S. 45-454, it's a well used for non-irrigation purposes with a pump capacity of no more than 35 gallons per minute.

Details come from the Fannie Mae Selling Guide, HUD Handbook 4000.1, the Code of Federal Regulations, the Arizona Revised Statutes, and ADWR and Pinal County web pages, all read October 30, 2026. Your loan program, the county and the well's records control the details for your home. This isn't legal advice.

Looking at a home with a well in Pinal County?

Send me the listing and I'll tell you what your loan program will need for the well, so there are no surprises near closing. No pressure.

Get pre-approved or ask Andria a question at andriatownsend.com or call 480-487-9166.

About the author: Andria Townsend is a Mortgage Loan Originator with NEXA Mortgage, LLC, based in San Tan Valley, Pinal County. She's lived in Arizona for 15+ years and helps buyers and homeowners across the state.

Andria Townsend, Mortgage Loan Originator, NMLS #2154631. NEXA Mortgage, LLC, NMLS #1660690. Equal Housing Opportunity. This is not a commitment to lend. All loans subject to credit approval, underwriting, and program guidelines.

Sources

• Fannie Mae Selling Guide B4-1.3-04: Site Section of the Appraisal Report
• Fannie Mae Selling Guide B4-1.4-08: Environmental Hazards Appraisal Requirements
• HUD Single Family Housing Policy Handbook 4000.1 (Update 18): Water Supply Systems, Individual Water Supply Systems (Wells), Shared Wells
• 7 CFR 3555.201: USDA Single Family Housing site requirements
• A.R.S. 45-593: Registration of existing wells; reporting open wells
• A.R.S. 45-454: Exemption of small non-irrigation wells
• ADWR: FAQ From Real Estate Agents and Title Agents
• ADWR: Ownership of a Well
• Pinal County: Aquifer Protection (Septic & Wells)