Nevada County Buyer Questions · Rural Property
Buying a Home with a Private Well and Septic System in Nevada County
Plan to test and inspect both, because the county will not do it for you at resale. Nevada County Environmental Health sets water-quality and yield standards for new homes on wells (coliform testing and at least 3 gallons per minute sustained, or 1 gpm with a 1,000-gallon storage tank), but it does not require a well test or septic inspection when an existing home sells. During your inspection period, order a lab water test, a well flow test and a septic inspection, and request the parcel’s septic records from the county.
Your well checklist
- Water quality lab test: at minimum total and fecal coliform bacteria. Ask the lab about adding nitrates and metals; your lender may specify what it needs.
- Flow or yield test: measures how much water the well delivers over time. Compare it with the county’s 3 gpm standard for new residences as a reference point.
- Equipment: age of pump, pressure tank and any treatment system.
- Well records: drilling date and depth if available from the seller or state well completion reports.
- Shared wells: if the well serves more than one home, read the recorded well-sharing agreement.
Worth knowing: the county does not monitor groundwater levels or limit how much water private wells draw, so past performance and a current flow test are your best evidence.
Your septic checklist
- County records: submit a public records request for the parcel’s septic file. The most useful document is the septic as-built, which maps the tank and leach field. Some older parcels have incomplete files.
- Inspection and pumping: a certified septic inspector opens and evaluates the tank and checks the leach field for signs of failure.
- System type: standard gravity systems are simplest. Pressure-dose and treatment systems require a recorded maintenance agreement and annual monitoring by a certified provider.
- Bedroom count: septic systems are designed for a number of bedrooms. Additions or converted rooms can create permit questions.
- Future plans: adding an ADU, pool or garage may require septic expansion and a new soils evaluation.
Timeline inside a typical escrow
| When | What to do |
|---|---|
| Before offer | Ask the listing agent for any existing well test, pump records and septic reports |
| Days 1-3 | Request county septic records; book well lab test, flow test and septic inspection |
| Days 4-12 | Inspections completed; lab results can take several business days |
| Before contingency removal | Review results, request repairs or credits, or cancel if needed |
Frequently asked questions
Does Nevada County require a well test when a house sells?
The county’s well standards apply to new residences. It does not publish a resale testing requirement, so buyers should order their own tests. Lenders, especially VA and FHA, often require a potability test.
How do I find septic records for a property in Nevada County?
Submit a public records request to Nevada County Environmental Health (950 Maidu Avenue, Nevada City; 530-265-1222) and ask for the septic file and as-built for the parcel.
What is a good well flow rate?
Nevada County requires at least 3 gallons per minute sustained for new homes, or 1 gpm with a 1,000-gallon storage tank. Household needs vary with irrigation, animals and occupancy.
Who pays for well and septic inspections?
Buyers typically pay for their own inspections, but it is negotiable. Repairs found during inspection are negotiated in the purchase agreement.
Sources
- Nevada County: Private Residential Wells
- Nevada County: Septic System
- Nevada County Environmental Health
Information current as of September 15, 2026. Confirm current requirements with Nevada County Environmental Health.
