A well flow test is a one-hour assessment that determines whether a private well can sustain reliable water delivery for normal household use. When purchasing a property with a private well — common throughout Colorado's rural and mountain communities — understanding the well's yield is one of the most critical steps in your due diligence.
Will the well run dry after 20 minutes? Will the pump start pulling sediment up from the bottom as the water level drops? Will the well produce enough water over the entire testing period? These are not hypothetical concerns. A failing or marginal well can mean costly pump replacements, storage tank installations, or an unusable water source after closing.
What We Test For
The accepted minimum standard for residential wells is 3 to 5 gallons per minute (GPM). During the one-hour pumping phase we monitor:
- Total water output and flow consistency
- Drawdown — how far the water level drops under sustained pumping
- Sediment or clarity changes in the discharge water
- Recovery rate after pumping stops
What's at Stake
A low-yield well affects daily life — showers, laundry, and appliances drawing simultaneously can deplete a marginal well faster than it recovers. Colorado's seasonal drought conditions can push a borderline well into failure. A flow test before closing gives you the facts you need to negotiate or walk away with confidence.
Frequently Asked Questions
Is this the same as a water quality test?
No. A quality test tells you what's in the water. A flow test tells you how much water the well can reliably deliver. Both are recommended.
Do lenders require it?
Many lenders — especially FHA and USDA loans — require a well flow test as a condition of financing. Check with your lender early in the process.
What if the well fails?
You have options — price negotiation, seller remediation, or a storage tank installation. A documented result gives you leverage.
Schedule Your Well Flow Test
Tiger Home Inspections performs well flow tests across all Colorado communities. Contact us to add a flow test to your home inspection or schedule it as a standalone service.