New Mexico's Environment Department treats private well testing as a recommendation, not a requirement, and it names buying a home with a private well as a time to test. Use your inspection period for a certified-lab water test and a pump and flow check, then file the water-right change of ownership after closing.

By Leland Titus, Qualifying Broker, Santa Fe Realty Unlimited · Updated November 11, 2026

I've been selling Santa Fe real estate for more than 20 years, and buyers of homes outside the water lines ask me this before they write an offer. Here's what New Mexico recommends, what to order during your inspection period, and the filing that's easy to forget after closing. Browsing rural homes and acreage? Start with my Santa Fe land and rural property listings or the Highway 14 and Turquoise Trail area.

Is a well inspection required when you buy in Santa Fe County?

The New Mexico Environment Department (NMED) says private wells fall outside its regulatory authority, and that its testing advice is "recommendations, not regulatory requirements." It does list "when purchasing a new home with a private well" as a time to test. So the water test is your call, and it's one I'd never skip.

Two things to confirm early. First, whether the home is on a well at all, since homes on city or county utility water don't raise these questions. Second, whether your lender has its own water or well requirements for the loan.

Source: NMED, Private Wells (guidance for owners of private wells).

What should a well water test cover?

NMED recommends having a certified or accredited laboratory test for:

  • Every year: coliform bacteria, nitrate and arsenic.
  • Every five years: uranium.
  • Based on your location or concerns: fluoride, lead, iron and manganese, volatile organic compounds and others.

Follow the lab's instructions for collecting and handing in the sample. NMED also offers free screenings at water fairs and some field offices, but says they don't replace certified lab testing.

Sources: NMED, Private Wells; Santa Fe County, Domestic Well Use Metering Program page (NMED field office testing).

What else should a well inspection check besides the water?

Water quality is only half of it. Have a licensed well or pump contractor look at the pump, the pressure tank and how the well performs, and ask them what the well can reasonably supply for the household you have in mind.

NMED's maintenance guidance also points to the wellhead: cracks in the casing, a damaged well cap, a poor seal, and ground that doesn't slope away from the well. If an inspection report says the well and septic system sit too close together, NMED says to contact its Onsite Wastewater Program. For septic, New Mexico requires the system to be evaluated before the property transfers (20.7.3.902 NMAC), and your purchase contract says who orders it, so ask for that report early.

Sources: NMED, Private Wells; NMED, Property Transfer Evaluations.

How do I check a well's state permit and records?

Ask the seller, through their agent, for the well permit, the Office of the State Engineer (OSE) file number, and every water test they have. NMED suggests looking up the well's Water Right Summary on the OSE's water rights database, or calling the OSE to ask whether the well was registered ((505) 827-6091 is the number NMED lists).

The OSE's Santa Fe office (District 6) handles most of Santa Fe County, at (505) 827-6120.

Sources: NMED, Private Wells; Santa Fe County, Domestic Well Use Metering Program page; NM OSE, Water Rights Allocation Program page.

What do I file after I buy a home with a well?

New Mexico law requires the new owner of a permitted water right to file a change of ownership form with the OSE, with a copy of the deed, and then to record a copy with the county clerk. For a domestic well permit, the OSE form is WR-02D, and the OSE's fee schedule lists a $2.00 filing fee. State rules add that the state engineer may cancel a domestic well permit if the new owner doesn't file in a timely manner.

Santa Fe County's recording fee is $25 per document for one to ten index entries.

Sources: NMSA 72-1-2.1; 19.27.5.12 NMAC; NM OSE, Ground Water Filing Forms and Fees; Santa Fe County Clerk fee schedule (updated July 10, 2025).

What's different about wells in Santa Fe County?

  • Water-use limits can be built into the lot. Under the county's Sustainable Land Development Code, new homes on lots created after the code took effect are limited to 0.25 acre-foot of domestic water per year (about 81,000 gallons by my arithmetic), or less if the development order says so.
  • Wells are metered. Developments that use a well take part in the county's metering program, with annual readings due April 30. As of today, the county says the program is being revised and readings aren't being collected. Ask for the lot's plat notes and development order to see which limits apply.
  • Market context. The Santa Fe Association of REALTORS® reports a Q3 2026 median single-family price of $839,900 in the county outside the city (185 sales) and a residential land median of $205,000 (32 sales). It doesn't report which sales have wells.

Sources: Santa Fe County SLDC, Water Conservation procedure; Santa Fe County, Domestic Well Use Metering Program page; SFAR MLS Quarterly Property Statistics, Q3 2026.

What should my Santa Fe County well checklist include?

Step When Who usually handles it
Confirm the home is on a well; ask for the permit, OSE file number and test history Before you offer Seller, through their agent
Look up the well's Water Right Summary Inspection period You or your agent
Certified-lab water test (bacteria, nitrate, arsenic, uranium) Inspection period Buyer orders
Pump, pressure tank, wellhead and flow check by a licensed contractor Inspection period Buyer orders
Septic evaluation report and well-to-septic distance Inspection period As your contract says (often the seller); you review it
Ask your lender about water requirements At loan application Buyer
File WR-02D with your recorded deed, then record it with the county clerk After closing New owner
Follow the county's well-meter rules Ongoing Owner

Frequently asked questions

Is a well inspection required in Santa Fe County? The New Mexico Environment Department says private wells fall outside its regulatory authority and calls its testing guidance recommendations, not requirements. It recommends testing the water when you buy a home with a private well.

What should I test private well water for? The Environment Department recommends yearly tests for coliform bacteria, nitrate and arsenic, and a uranium test every five years, run by a certified or accredited lab. It lists more tests based on your location or concerns.

Do I have to transfer the water right when I buy a home with a well? Yes. New Mexico law says the new owner of a permitted water right files a change of ownership form with the Office of the State Engineer, with a copy of the deed, and records a copy with the county clerk.

Does Santa Fe County meter private wells? Santa Fe County's code says developments using a well take part in its metering program, with annual readings due April 30. The county's page currently says the program is being revised and readings aren't being collected, so ask what applies to your lot.

Talk it through with Leland

I'll help you line up the right inspectors, read the permit and test history with you, and negotiate based on what turns up.

Call or text me at (505) 388-0310, or call the Santa Fe Realty Unlimited office at (505) 467-8829, and let's talk through the property. Search Santa Fe land and rural homes, read my Santa Fe home buying guide or see what buyers pay at closing. Curious how water rights come into a sale? Read our La Mesilla water rights sale.

This article is general information, not legal, water-rights or health advice. Confirm requirements with the OSE, NMED, Santa Fe County, your lender and a licensed well contractor or attorney.

Sources

  • New Mexico Environment Dept., Private Wells: env.nm.gov; Property Transfer Evaluations: env.nm.gov (accessed Nov 4, 2026)
  • NM Office of the State Engineer, Water Rights Allocation Program, forms and fees, District 6 contact: ose.nm.gov (accessed Nov 4, 2026)
  • NMSA 72-1-2.1, Water rights; change in ownership: law.justia.com; 19.27.5.12 NMAC, Change of ownership: law.cornell.edu (accessed Nov 4, 2026)
  • Santa Fe County, Sustainable Land Development Code, Water Conservation procedure: sa6524.zoninghub.com (accessed Nov 4, 2026)
  • Santa Fe County, Domestic Well Use Metering Program: santafecountynm.gov (accessed Nov 4, 2026)
  • Santa Fe County Clerk, Recording and Filing Fee Schedule (updated July 10, 2025): santafecountynm.gov (accessed Oct 28, 2026)
  • Santa Fe Association of REALTORS® MLS, Santa Fe Area Quarterly Property Statistics, Q3 2026 (current as of October 1, 2026)