Septic Installation & Replacement in Los Lunas & Valencia County

Valencia County has seen some of the fastest residential growth south of Albuquerque over the past several years, and a meaningful share of that new construction sits outside municipal sewer service — which means a new septic installation is often step one before anyone can move in.

Soil variation across the county

Valencia County spans river-valley farmland near the Rio Grande to higher, drier ground toward the Manzano foothills to the east, with soil conditions shifting accordingly. Rio Grande-adjacent parcels tend toward sandier alluvial soil with a shallower water table, while properties further from the river run into more variable conditions, occasionally including caliche. As always, a site-specific percolation test is what actually determines your design — not which side of the county you're on.

Permitting for new construction in Valencia County

Valencia County properties are permitted through NMED's local field office coordination for the county. Because so much of the septic work happening here is tied to new construction, it's worth building the permit timeline into your overall project schedule early — a septic permit needs to be issued before a home can be placed on the lot, not after.