De Baca County Well Water Testing
Private-well guidance for De Baca County, New Mexico: USGS area-risk estimates for arsenic and nitrate, a recommended test panel, and how to get your own well tested at a New Mexico-certified lab.
De Baca County has a small private-well population. If you're on city (municipal) water, check your city's tap-water quality report — search by city or by ZIP code.
On one of the roughly 428 private wells in De Baca County? The USGS area-risk estimates below are for you.
Municipal (public) water in De Baca County
Most De Baca County residents are served by a public water system, not a private well. If that's you, open your city's tap-water quality report:
De Baca County groundwater risk (area estimates)
These are modeled USGS estimates for the county area — not a measurement of your specific well.
Arsenic
area estimate16%
modeled chance a well in this area exceeds 10 µg/L (the EPA limit).
22% chance of exceeding 5 µg/L.
Most-probable concentration category: <=5 ug/L.
Nitrate
area estimate3.34 mg/L
predicted nitrate (as N) for domestic-supply depth.
This estimate is below the 10 mg/L EPA limit, but individual wells can still exceed it.
Private wells
area estimate428
people on private wells in De Baca County.
Roughly 171 households, estimated from the USGS modeled domestic-supply population.
Area context
Additional state-only or optional layers for De Baca County, shown where the data exists.
Uranium
area estimateA state-only uranium model is not available for New Mexico. See observed samples and test your own well to learn its uranium level.
Radon
area estimateA state-only radon model is not available for New Mexico. See observed samples and test your own well to learn its radon level.
Agricultural land use
area contextAbout 0% of the De Baca County area is row-crop farmland (USDA Cropland Data Layer). Intensively farmed row-crop land raises the likelihood of elevated nitrate in nearby groundwater, so it is a reason to include nitrate in your test panel. This is land-use context for the county area — not a measurement of nitrate in any well.
These figures are USGS area estimates: statistical groundwater models describing how likely elevated contaminant levels are across a county. They are not designed to predict the concentration in any single well. Only testing your own well reveals its water quality.
Recommended test panel for De Baca County
- coliform
- arsenic
Coliform bacteria is recommended for every private well as the universal baseline test. Arsenic is flagged because the USGS area model estimates a 16% chance of exceeding 10 µg/L. The federal loan minimum (FHA, VA, USDA) tests for coliform, nitrate, nitrite, lead.
Federal FHA, VA, and USDA home loans require testing for coliform, nitrate, nitrite, lead at the point of a federally-backed loan. See the program-specific rules: FHA well test, VA well test, USDA well test.
Already have lab results? Interpret your well water test results to see how your own numbers compare to EPA limits.
How De Baca County compares across New Mexico
Where De Baca County's modeled area estimates sit relative to the other New Mexico counties in our analysis.
- Arsenicabove the New Mexico median
De Baca County: 16% · New Mexico median: 9% · flagged in 14 of 33 counties.
See all New Mexico arsenic data → - Nitrateabove the New Mexico median
De Baca County: 3.34 mg/L · New Mexico median: 0.91 mg/L · flagged in 1 of 33 counties.
See all New Mexico nitrate data →
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Find a state-certified lab
Test your De Baca County well through a lab certified by the New Mexico Environment Department Drinking Water Bureau — find one in the official directory (Downloadable PDF list).
Recognize & research well-water problems
Notice a problem? Diagnose it by symptom
Learn about these contaminants in drinking water
Data sources
De Baca County's estimates are modeled from public federal datasets. See the data & methodology for how we build, source, and validate them.
- USGS arsenic probability-of-exceedance model
- USGS nitrate predicted concentration, domestic-supply depth
- USGS domestic (private) well population density
- USDA NASS Cropland Data Layer (CDL) 30m
- EPA/USGS Water Quality Portal (waterqualitydata.us)
- US Census TIGER/Line county polygons
By TapWaterData Editorial · Last updated June 26, 2026.
De Baca County well water FAQ
How do I test my well water in De Baca County?
Order a sample kit covering the recommended panel for De Baca County (coliform, arsenic), then send it to a New Mexico-certified drinking-water laboratory. Certified labs use EPA-approved methods, so the results are defensible for a federally-backed home loan. You can also use a mail-in test kit for a convenient EPA-certified analysis.
What does the USGS arsenic estimate mean for my well?
It is an area estimate, not a prediction for your specific well. The USGS model describes how likely elevated arsenic is across De Baca County as a whole; an individual well in the county can be much higher or much lower. Only testing your own well reveals its actual arsenic level.
How often should a private well be tested?
The CDC recommends testing private wells at least once a year for total coliform bacteria and nitrate, and more often if you notice a change in taste, color, or odor, or after flooding or nearby construction.
Does New Mexico require well testing?
Federal FHA, VA, and USDA home-loan programs require a private-well water test at the point of a federally-backed loan. A state sale, rental, or recurring testing mandate was not independently verified for this state — consult your state's program.
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