Nevada Well Water
Last reviewed October 29, 2026
Overview
Private wells supply water to many Nevada households. Because they are generally not regulated like public systems under the federal Safe Drinking Water Act, testing and wellhead protection are the owner’s responsibility.
Hydrogeology & what it means
Nevada pumps from basin-and-range alluvial aquifers in an arid setting. The documented regional concerns below indicate what is worth testing for — not what any individual well contains.
Documented regional concerns
- Naturally occurring arsenic in parts of the state — odorless and tasteless, so only testing reveals it.
- Naturally occurring uranium in some aquifers.
- Naturally occurring fluoride above recommended levels in some groundwater.
- High total dissolved solids/salinity in some aquifers.
- Hard water from carbonate (limestone/dolomite) aquifers.
These are documented possibilities, not a reading of your well
Frequently asked questions
What should well owners in Nevada test for?
A practical panel for Nevada private wells includes Total coliform bacteria, Nitrate (as N), pH, Arsenic, Uranium, Fluoride, Total dissolved solids, Total hardness. Test bacteria and nitrate at least annually and use a state-certified laboratory; confirm local recommendations with your state health department and University of Nevada, Reno Cooperative Extension.
Are private wells regulated in Nevada?
Private wells are generally not covered by the federal Safe Drinking Water Act, though Nevada or local rules may apply to construction, permitting, or testing. Public-system limits such as EPA MCLs are useful reference points, not automatic legal limits for your well.