What Is a Well Yield Test and Why Does It Matter in New Hampshire?

🏡 What Is a Well Yield Test and Why Does It Matter in New Hampshire?

Much of Central NH — including Plymouth, Campton, Rumney, Thornton, and Ashland — relies on private wells for water.

When buying a home with a private well, one of the most important tests is the well yield test.

Here’s what NH buyers need to know.

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What Is a Well Yield Test?

A well yield test measures how much water a well can provide over time, typically recorded in gallons per minute (GPM).

A licensed well contractor runs the pump to see:

✔ How much water the well can produce

✔ Whether it can sustain typical household use

✔ If the water level recovers properly

This test ensures the home has a reliable long-term water supply.

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What Is a Good Well Yield in NH?

New Hampshire generally considers:

✔ 4+ GPM = acceptable for a typical home

✔ 8+ GPM = strong

✔ 10–20+ GPM = excellent

Wells under 2 GPM often require storage tanks or other solutions.

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Why Well Yield Tests Matter for NH Buyers

A weak well can lead to:

⚠ Slow water flow

⚠ Inconsistent pressure

⚠ Running out of water with multiple fixtures

⚠ Expensive deepening or replacement

In rural areas of Central NH, well performance varies greatly — even between neighboring properties.

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Common Well Issues in NH

Buyers should be aware of:

✔ Sediment buildup

✔ Pump failure

✔ Wells that run dry seasonally

✔ Very old wells (30–50+ years)

✔ Iron, manganese, or bacteria issues (handled in water testing)

A well yield test checks performance, not water quality — so water testing is still required.

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How Buyers Can Protect Themselves

✔ Always request a well yield test for homes with private wells

✔ Compare results to NH minimum standards

✔ Review well depth and age

✔ Ask for service records

✔ Plan for storage tanks if yield is low

This is especially important for large households or multi-bath homes.

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Q&A

Q: Does the state of NH require a well yield test?

A: Not always, but most lenders strongly recommend it for private wells.

Q: How long does the test take?

A: Typically 1–3 hours depending on the well and equipment.

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Keywords

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Jim Johnson Real Estate

Phone: 857-249-7392

Serving Plymouth, Campton & Central New Hampshire

Brokered by Three Hills Real Estate Service