New Hampshire Well Water Guide — Arsenic, PFAS, Testing & Rebates

38% of New Hampshire residents rely on private wells. The state has some of the highest arsenic levels in the country, an ongoing PFAS crisis, and rebate programs that will pay you to fix your water. Nobody is testing your well but you.

The Numbers

~500K NH residents on private wells

30% of tested wells exceed EPA arsenic limit

27% of tested wells exceed NH PFAS standards

$5-10K in state rebates for treatment systems

Why It Matters

New Hampshire's granitic bedrock naturally contains arsenic, uranium, and radon — contaminants that dissolve invisibly into well water. On top of that, industrial PFAS contamination from sites like Saint-Gobain in Merrimack and the former Pease Air Force Base has created an ongoing crisis affecting thousands of wells.

Unlike public water systems, private wells are not regulated by the EPA. No one tests your water, treats your water, or notifies you if something is wrong. That's on you.

The good news: New Hampshire offers $5,000-$10,000 in rebates for well water treatment systems. Learn if you qualify.

PFAS in NH

Saint-Gobain, Pease Tradeport, and other sites. NH has the strictest PFAS standards in the nation. 27% of tested wells exceed them.

Arsenic

30% of tested wells exceed the EPA limit. Tasteless, odorless, colorless. A Class I carcinogen. NH's granitic geology is the source.

Treatment Rebates

NH DES offers $5,000-$10,000 toward treatment systems. This page explains eligibility, how to apply, and what's covered.

Radon in Water

NH's granite produces radon that dissolves in well water and off-gases indoors. The second leading cause of lung cancer.

Find Your Community

We've researched water quality conditions for communities across New Hampshire that rely on private wells. Each guide covers local geology, specific contaminants, PFAS exposure, testing recommendations, and treatment options including rebate eligibility.