A residential well, a commercial well, and an agricultural well can sit a mile apart in the same aquifer and still be drilled, cased, and equipped very differently. The difference isn't the water underground — it's how much you need, how fast you need it, and what rules apply to that use. Here's how the three break down in Southern Utah.
What Makes a Residential Well Different From a Commercial or Agricultural Well?
A residential well is sized around household demand: a few fixtures running at once, maybe a washing machine and a hose bib at the same time. Casing diameter and pump horsepower are set to cover that peak, not sustained high-volume flow. Commercial and agricultural wells are built for continuous or high-volume draw — a shop, a livestock operation, or irrigated acreage — which usually means larger casing, a bigger pump, and sometimes a different well configuration entirely. We cover the specifics on the residential well drilling, commercial well drilling, and agricultural well drilling pages.
Does Depth or Casing Size Change Based on Use?
Depth is driven by geology and the local water table, not by what the well is for — a residential and an agricultural well next to each other often hit water at a similar depth. What changes is diameter and pump sizing:
| Well Type | Typical Draw Pattern | What Usually Scales Up |
|---|---|---|
| Residential | Intermittent, household peaks | Pressure tank sizing, standard casing |
| Commercial | Steady daytime demand, can be continuous | Casing diameter, pump capacity |
| Agricultural | High-volume, seasonal, irrigation-driven | Casing diameter, pump horsepower, sometimes a dedicated irrigation well |
A farm or ranch that also needs a domestic supply for a house on the property often ends up with two separate wells rather than one well doing both jobs — mixing a high-volume irrigation draw with a household pressure system isn't a good fit for either use.
Does Water-Rights Coordination Change Based on Well Use?
Yes. Utah water rights are tied to beneficial use — domestic, commercial, or irrigation/stockwatering are treated differently under the state's permitting framework, and the paperwork depends on which one applies to your property. A residential well typically falls under a straightforward domestic use category. Commercial and agricultural wells more often require a specific water right tied to the intended use and volume before drilling starts. This is part of why site evaluation and water-rights coordination happen up front rather than after the rig shows up — it's easier to confirm the right category applies before drilling than to sort it out afterward.
Does the Site Evaluation Look Different for Each Type?
The geology assessment is the same regardless of use — checking access, expected formations, and groundwater conditions on that specific parcel. What differs is what we're evaluating the site *for*. A commercial site evaluation accounts for how the property is used day to day — traffic, existing utilities, setback from a building or septic system. An agricultural evaluation looks at field layout, distance to the point of use for irrigation, and whether the property might need more than one well long-term as acreage is developed.
Which Type of Well Do You Need?
Most of the time this is obvious — a homeowner needs a residential well, a rancher needs agricultural. Where it gets less clear is properties with mixed use: a hobby farm with a house, a commercial building with outdoor irrigation, or acreage that's partly residential and partly cultivated. In those cases, the right call depends on actual peak demand across the property, not just the zoning label.
If you're not sure which category your property falls into, that's a normal question to bring to a site evaluation rather than something you need to figure out on your own first. We drill residential, commercial, and agricultural wells throughout Cedar City and the surrounding region — Iron, Washington, Beaver, Kane, Garfield, Piute, and Wayne counties — and the type of well drives the plan from the first site visit, not as an afterthought once drilling starts.