Well Drillers in Yuma County, AZ

Well Drillers in Yuma County, Arizona

Three licensed well drilling contractors serve Yuma County, an agricultural powerhouse at the confluence of the Colorado and Gila rivers. While Yuma city residents and farms primarily rely on Colorado River surface water delivered through Bureau of Reclamation canals, private wells remain essential for domestic users outside the city’s service area and for agricultural supplemental supply.

Groundwater Drilling in the Yuma Area

Yuma County’s geology makes it one of the simpler drilling environments in Arizona from a formation perspective — the lower Colorado River has deposited thick sequences of sand and gravel that form a productive, shallow-to-moderate-depth aquifer. Well depths for domestic use typically run 150–400 feet, shorter than most other Arizona counties.

However, what Yuma lacks in drilling difficulty it more than compensates for in water quality challenges. The Colorado River’s high dissolved solids load, combined with decades of agricultural drainage and evaporative concentration, has produced groundwater that is among the most mineral-laden in Arizona.

Water Quality Warning for Yuma County Wells

Before drilling or purchasing a home with a well in Yuma County, comprehensive water testing is essential:

TDS: Yuma County groundwater commonly exceeds 1,000–3,000 mg/L. The Colorado River itself carries 800–1,000 mg/L at Yuma (subject to seasonal variation), and groundwater influenced by agricultural return flows can be significantly higher. Reverse osmosis is essentially mandatory for drinking water quality.
Hardness: Extreme — 600–1,000+ mg/L in some areas. Water softeners are standard but require careful sizing given the high mineral load.
Nitrates: Heavy historical irrigation with fertilizers has elevated nitrate in shallow aquifer zones across the valley. Test and test again.
Arsenic: Present at low to moderate levels; test all new wells.
Selenium: An agriculturally-associated contaminant found in some Yuma County groundwater.

The Bureau of Reclamation operates the Yuma Desalting Plant (currently intermittently operational) and the Wellton-Mohawk Irrigation & Drainage District (WMIDD) runs drainage desalination to manage return flow salinity — a testament to how seriously the salinity problem is taken in this region.

Drilling Costs in Yuma County

Yuma’s shallow alluvial drilling makes it one of Arizona’s lower-cost markets:

Per-foot rate: $35–$55/foot for alluvial formations
Typical depth: 150–400 feet for residential wells
Estimated total (drilling only): $8,000–$25,000
Complete system with pump: $14,000–$35,000

Note: Budget separately for water treatment, which is not optional in most of Yuma County. A basic softener + RO drinking water system adds $1,500–$4,000.