What Are Private Well Water Testing Requirements in New Hampshire?

🏡 What Are Private Well Water Testing Requirements in New Hampshire?

Many New Hampshire homes rely on private wells instead of municipal water. Because private wells are not regulated by the state, buyers must take extra steps to ensure the water is clean, safe, and suitable for daily use. Here’s what NH homebuyers should know about well water testing before closing.

⭐ Are Well Water Tests Required in NH?

New Hampshire does not legally require well water testing for a sale, but lenders often do.

Even when not required, testing is strongly recommended because private wells can contain:

✔ Bacteria

✔ Nitrates and nitrites

✔ Arsenic

✔ Radon in water

✔ Lead

✔ Hardness or mineral issues

NH has some of the highest natural arsenic levels in the country, especially in granite-heavy regions.

⭐ Recommended Water Tests for NH Homebuyers

The New Hampshire Department of Environmental Services (NHDES) recommends testing private wells for:

✔ Total coliform bacteria

✔ Arsenic

✔ Nitrate & nitrite

✔ Uranium

✔ Lead & copper

✔ pH levels

✔ Hardness

✔ Chloride

✔ Iron & manganese

✔ Radon in water (if high radon is found in the home’s air)

A standard “NH real estate water test” often includes many of these.

⭐ Who Pays for Well Testing?

This varies by transaction:

✔ Buyers often pay as part of inspections

✔ Some sellers agree to pay if issues are found

✔ Lenders may require testing as part of financing

✔ FHA, VA, and USDA loans typically mandate well testing

If any contaminants exceed safe limits, treatment may be required before closing.

⭐ How Are Issues Fixed?

Common solutions include:

✔ Arsenic: point-of-use or whole-house filtration

✔ Bacteria: shock chlorination or UV purification

✔ Hardness: water softener system

✔ Iron & manganese: sediment or oxidation filters

✔ Radon in water: aeration or granular activated carbon

NH buyers should confirm that treatment systems are properly installed and maintained.

⭐ How Often Should NH Homeowners Retest?

NHDES recommends:

✔ Annually: bacteria testing

✔ Every 3–5 years: full comprehensive testing

✔ Whenever water changes appearance, taste, or odor

Private wells are the homeowner’s responsibility — not the town’s.

⭐ Bottom Line

Private wells are common across New Hampshire, and thorough water testing is essential for safe drinking water and mortgage approval. NH buyers should always complete a full water test and understand the results before closing on a home with a private well.

Jim Johnson Real Estate

Phone: 857-249-7392

Serving Plymouth, Campton & Central New Hampshire

Brokered by Three Hills Real Estate Service