Inspections: the health district’s, and the one a buyer should pay for

The inspection SIPH already does

When a permitted system is installed, an Environmental Health Specialist checks it before it is covered. The installer submits an as-built that must show the setbacks on the permit: well-to-tank, well-to-drainfield, property lines, surface water, canals, and replacement area. That inspection answers “was this built as permitted?” It does not answer “will this field still accept today’s laundry load in March?”

A pre-purchase inspection worth paying for

EPA’s homeowner guidance and SIPH’s pumping page describe the measurements that actually matter. Ask the inspector—in writing—to do at least this:

• Locate the tank from records or in the field; note lid depth and whether risers exist
• Measure scum and sludge relative to the outlet baffle (EPA: pump if scum is within 6 inches of the baffle bottom, sludge within 12 inches of the outlet, or combined layers occupy more than 25% of liquid depth)
• Inspect inlet and outlet baffles or tees for corrosion, missing pieces, or reverse flow
• Look at tank walls and lids for cracks, roots, groundwater infiltration, and riser leaks
• Walk the drainfield for soggy ground, sewage odor, lush winter-green strips, and traffic ruts
• Open the distribution box if one exists; look for unequal flow
• Note pumps, alarms, filters, and ETPS components, and whether a current service contract exists
• Compare what is in the ground to the SIPH as-built, bedroom count, and any expansion of the house

A “visual only, lids not pulled” letter is not an inspection. Neither is a pump-out with no baffle notes. If the seller refuses access to lids, treat that as information.

What an inspection cannot certify

No private inspector can guarantee years of remaining drainfield life. Soil pores clog from inside. High groundwater in a Snake River wet spring can saturate a field that looked dry at closing in September. Load the report with measurements and photos, not adjectives.

If the house added a bedroom, an ADU, or a shop bathroom without a permit, the system may be undersized under IDAPA tank and drainfield sizing even if it is currently “working.” That is a SIPH question, not a realtor talking point.

Who may do the work

Pumping in Idaho requires a pumper permit. Installation and many repairs require a basic or complex installer permit. ETPS operation and monitoring require a certified service provider. A general home inspector is not automatically any of those things. Ask which license they will stand on, then verify it.