Drought risk in New Hampshire

Drought in New Hampshire: A Quiet but Recurring Risk

New Hampshire is a generally wet state — most years bring roughly 40 to 50 inches of precipitation — which is why drought is often overlooked here. But the state is rated Level 2 of 5 for drought risk, and the record shows that prolonged dry spells do occur. New Hampshire drought usually develops slowly, over months of below-normal rainfall combined with above-normal temperatures, when water lost to evaporation and thirsty plants outpaces what falls from the sky.

Drought is most common from late spring through fall, peaking in summer and early autumn. A dry winter matters too: when snowpack is thin, spring snowmelt delivers less recharge to streams, lakes and groundwater before the growing season begins. Because much of New Hampshire's water is stored underground rather than in reservoirs, drought impacts can lag behind the rain — a well can run low weeks after precipitation returns.

Exposure varies across the state. The southeastern counties — Rockingham, Strafford and parts of Hillsborough — and the Merrimack Valley are the most drought-sensitive areas. They combine a dense population, heavy summer water demand and many homes served by shallow, low-yield bedrock wells. The Seacoast region and small community water systems also feel the pinch quickly. Northern New Hampshire is generally wetter, but river valleys can still dry out. The U.S. Drought Monitor has recorded Extreme Drought (D3) in southeastern New Hampshire, and state officials maintain a drought management program that convenes a task force and issues drought condition advisories when conditions worsen.

How It Affects Homes

Unlike floods or hurricanes, drought rarely damages a home in a single event. Instead, it stresses a home's systems over weeks and months.

• Wells running dry. State agencies estimate that roughly 40 percent of New Hampshire residents get drinking water from a private well. Many are drilled into fractured bedrock with limited storage, so a falling water table can leave a household without water — and repeated cycling can burn out the well pump.
• Water quality changes. As water levels drop, naturally occurring contaminants such as arsenic, manganese and radon can become more concentrated in well water. Annual testing is the only way to know.
• Soil movement and foundation damage. When soils dry and shrink, then re-wet and swell, foundations, driveways, patios and retaining walls can crack or settle. Long dry spells also stress foundations near mature trees.
• Landscape loss. Lawns, shrubs and shallow-rooted trees can be killed or weakened. Dead and stressed trees are more likely to drop limbs on a house later on.
• Higher wildfire risk. Dry grass and brush — especially in spring before green-up and again in autumn — raise the risk of brush fires near homes.
• Septic system strain. Water conservation is essential during drought, but consistently very low flow can affect septic tank function. Moderate, monitored use is best.

Insurance considerations: Standard homeowners insurance generally does not cover drought-related damage. Well failure, landscaping loss and cracking caused by soil settlement are typically treated as wear, tear or lack of maintenance, and are excluded. Coverage usually applies to sudden, accidental events — a burst pipe, for example — not to a well that slowly ran dry. Before buying a home with a private well in New Hampshire, ask for well yield and water-level records, and talk with your insurance agent about what is and is not covered.

How to Prepare Your Home

1. Know your water source. Learn your well depth, yield and pump age. Test well water at least annually for arsenic, bacteria, nitrates and other contaminants.
2. Conserve water before drought hits. Install EPA WaterSense labeled fixtures and appliances, fix dripping faucets and running toilets, and run dishwashers and washing machines only with full loads.
3. Landscape for dry spells. Use native, drought-tolerant plants, add mulch to hold soil moisture, and water deeply and infrequently rather than lightly and often. Let lawns go dormant in summer.
4. Protect your well and pump. Ask a licensed well contractor about a low-water cut-off switch, and consider a storage tank or a hauled-water plan if your well is marginal.
5. Watch your foundation. Keep gutters and downspouts clear, direct water away from the foundation, and water foundation plantings slowly during long dry spells to limit soil shrinkage.
6. Reduce wildfire fuel. Maintain defensible space: clear dry leaves, brush and dead vegetation, and keep firewood away from the structure.
7. Store emergency water. Ready.gov recommends at least one gallon per person per day for three days, plus water for pets.
8. Track conditions. Follow the U.S. Drought Monitor, check state drought advisories, and obey any restrictions issued by your local water system.

Frequently Asked Questions

Does homeowners insurance cover drought damage in New Hampshire?

Generally, no. Standard policies exclude damage from drought, including wells that run dry, dead landscaping and cracking caused by soil movement, because these are considered maintenance issues or gradual damage rather than a sudden covered peril. Review your policy with a licensed agent and ask specifically how your water supply would be treated.

Is my private well at risk during a New Hampshire drought?

It can be, especially if it is shallow or has a low yield. Wells drilled into bedrock rely on fractures that refill slowly, and water levels can keep dropping even after rain returns. Monitoring your water level, conserving early and having a plan for stored or hauled water can get you through a dry spell.

Does New Hampshire restrict water use during a drought?

Restrictions can apply. The state issues drought condition advisories and works with local water systems, which may impose mandatory outdoor watering bans or other limits. Private well owners may not be directly covered by public system rules, but conservation still protects the shared aquifer and your own supply.

Official Resources

• New Hampshire Homeland Security and Emergency Management
• U.S. Drought Monitor
• Drought.gov
• EPA WaterSense