Nashua NH Water Restrictions 2026

Current water restrictions in Nashua, New Hampshire

Nashua is currently under no active drought-stage restrictions, though Pennichuck Water Works maintains a standing year-round outdoor watering schedule that limits irrigation to 2 days per week. The schedule is a baseline conservation measure enforced by Pennichuck Water Works, the private utility that supplies water to Nashua and surrounding communities including Merrimack, Milford, and portions of Hudson. It is not a drought emergency declaration — it is the utility's standard operating rule, and it remains in effect regardless of season or current reservoir levels.

Pennichuck Water Works sets and enforces this schedule under its service agreement authority rather than a declared shortage emergency. New Hampshire's statewide drought status is currently Normal, with no active state-level restrictions in effect. That means no escalation to Phase 2 or Phase 3 restrictions is currently expected, but Pennichuck can move to a more restrictive stage quickly if conditions change — check pennichuck.com or call 603-882-5191 for current stage status before making landscaping decisions.

Practically speaking: a Nashua resident with an odd-numbered street address cannot water their garden on a Wednesday morning. Wednesday is not an assigned watering day for any address under the current schedule. If that resident's address ends in an odd number, Monday and Thursday are their allowed days — and even then, only before 10:00 AM or after 4:00 PM. Midday watering between 10:00 AM and 4:00 PM is prohibited every day of the week for all addresses.

The restriction end date listed in utility records extends through December 31, 2026, reflecting that this is an ongoing programmatic rule rather than a temporary emergency measure. For any questions about current deficit data or a potential stage upgrade, contact Pennichuck directly — they are the authoritative source for current conditions in Nashua.

Watering schedule and allowed days

Your assigned watering days are determined by whether your street address number is odd or even. If you live at 47 Amherst Street, your number is odd — water Monday and Thursday. If you live at 84 Main Street, your number is even — water Tuesday and Friday. Saturday and Sunday are not assigned watering days for automated irrigation under the current schedule. When in doubt about your address classification, Pennichuck Water Works can confirm your assignment at 603-882-5191.

Multi-family properties and commercial accounts in Nashua follow the same odd/even address assignment based on the property's primary street number. A condominium complex at an even-numbered address waters Tuesday and Friday — each unit owner does not get an independent assignment. Commercial landscape irrigation follows the same day and hour restrictions as residential accounts. Property managers overseeing multiple buildings at different addresses should verify each address individually with Pennichuck.

New sod and seeded areas are a common exception. Pennichuck Water Works typically grants a 21-day establishment variance for newly installed lawns — but you must confirm this with the utility before installation, not after. Do not assume the variance applies automatically. For established trees in Nashua's urban canopy — including sugar maple, red oak, and white birch, all of which are common to southern New Hampshire — deep, infrequent watering on your assigned days is far more effective than daily light applications, and these species can tolerate the two-day schedule well once established.

What happens if you violate restrictions in Nashua?

Pennichuck Water Works enforces the watering schedule through a combination of field patrols and customer complaint reports. Service staff and meter readers who observe prohibited irrigation — sprinklers running on a wrong day or during the 10:00 AM–4:00 PM midday window — are authorized to document violations and initiate the citation process. Pennichuck has deployed Advanced Metering Infrastructure (AMI) technology across parts of its service territory, which allows the utility to monitor consumption patterns and flag unusual midday usage that may indicate schedule violations. If you receive a citation you believe was issued in error, contact Pennichuck directly at 603-882-5191 to discuss the circumstances — the utility does have a process for reviewing disputed citations before escalation.

Neighbor complaints are a meaningful enforcement trigger in Nashua. Pennichuck takes reported violations seriously and responds to complaint inquiries through its customer service line. If you have questions about appealing a fine or requesting a variance for a legitimate use case — such as athletic field irrigation or a new commercial landscape installation — raise that with Pennichuck before the violation is finalized, not after the fine escalates.

Other outdoor water rules

Beyond lawn irrigation, Pennichuck Water Works restricts or discourages several categories of outdoor water use during any active conservation stage. Under the current baseline schedule, the following rules apply:

• Vehicle washing: Permitted, but strongly encouraged to use a commercial car wash that recycles water. If washing at home, a shut-off nozzle is required on any hose — letting water run continuously is considered wasteful use and may be cited during any elevated restriction stage.
• Pool filling and top-off: Permitted under the current no-restriction status. If Pennichuck declares a higher conservation stage, pool filling restrictions are typically among the first measures added. New pool fills of significant volume should be coordinated with Pennichuck in advance.
• Pressure washing: Permitted for home maintenance. Nashua's wet, freeze-thaw climate makes annual pressure washing of decks and driveways common — use a shut-off nozzle and avoid runoff into storm drains.
• Ornamental fountains and water features: Recirculating systems are unrestricted. Single-pass systems that discharge water to drain are discouraged and may be restricted under a higher conservation stage.
• Construction and dust control: Commercial and residential construction sites using potable water for dust suppression must comply with the same schedule during any active restriction stage. Contractors should confirm with Pennichuck before committing to project timelines that depend on unrestricted water access.
• Drip and soaker irrigation: Exempt from the day-of-week restrictions at all times under the current schedule.

Water source and infrastructure

Nashua's water supply is managed entirely by Pennichuck Water Works, a regulated private utility that has served the city since 1852. Pennichuck draws its supply primarily from Pennichuck Brook and its associated impoundments — specifically Pennichuck Pond, Bowers Pond, and Harris Pond, a system of interconnected surface water sources located in Merrimack and southern Hillsborough County. These ponds are the backbone of supply for Nashua and the surrounding communities Pennichuck serves.

Water from the Pennichuck Brook watershed is treated at the Pennichuck Water Works treatment facility on Dubuque Street in Nashua before entering the distribution system. The treatment process includes filtration and disinfection to meet EPA Safe Drinking Water Act standards. Pennichuck also has access to groundwater sources — specifically drilled wells tapping into glacial aquifers in the Merrimack River Valley — which supplement surface water during high-demand periods or low-flow conditions in the brook system.

The Pennichuck Brook watershed covers roughly 22 square miles and is subject to land protection efforts by Pennichuck and partner conservation organizations to limit development and contamination risk near the impoundments. Nashua sits in the Merrimack River drainage basin, and the Merrimack River itself is not a direct Nashua drinking water source — but its watershed hydrology directly influences groundwater recharge rates in the glacial aquifers Pennichuck taps as a supplemental supply.

New Hampshire's geology — dominated by glacial till, fractured bedrock, and stratified drift deposits — means that drought in southern New Hampshire affects both surface pond levels and aquifer recharge simultaneously. Pennichuck monitors its reservoir levels and stream gauge data at Pennichuck Brook continuously. Current reservoir level data and any declared deficit figures are published by Pennichuck — contact the utility at 603-882-5191 or visit pennichuck.com for the most current figures.

Brown lawn protections in New Hampshire

New Hampshire does not have a specific state statute preempting HOA enforcement of lawn appearance standards during water restrictions, unlike states such as Colorado (CRS § 37-60-126), Florida (FS § 720.3075), or California (Gov. Code § 65595). If your Nashua HOA fines you for a brown or dormant lawn while you are complying with Pennichuck Water Works' mandatory schedule, you do not have an automatic statutory shield. However, you do have a practical argument: courts and HOA dispute processes generally recognize that requiring a homeowner to violate a utility-mandated watering restriction to maintain green grass is unreasonable. Document your compliance carefully — save your assigned watering days, note the Pennichuck schedule, and photograph your lawn with timestamps.

If your HOA issues a violation notice, respond in writing promptly. A reasonable response letter might read:

"I am writing in response to your notice dated [date] regarding lawn appearance at [address]. My outdoor irrigation is currently governed by the mandatory watering schedule established by Pennichuck Water Works, the licensed water utility serving Nashua, NH (603-882-5191; pennichuck.com). Under this schedule, outdoor irrigation is limited to two days per week with prohibited midday hours. I am in full compliance with this utility-mandated program. I respectfully request that this violation notice be rescinded, as requiring additional irrigation would place me in violation of Pennichuck's enforceable schedule. I am happy to provide documentation of my compliance."

New Hampshire homeowners in HOA communities should also review their specific HOA governing documents. Some HOA agreements in Nashua-area developments include language that automatically defers to municipal or utility watering mandates — check your CC&Rs before assuming the worst. The New Hampshire Attorney General's Consumer Protection Bureau (603-271-3641) can advise on HOA dispute options if your association refuses to recognize the Pennichuck schedule as a valid defense.

Lawn care during restrictions

Nashua's cool-humid climate in southern New Hampshire supports cool-season grasses that are well-suited to the two-day watering schedule when managed correctly. The following are the locally relevant turfgrass types:

For Nashua lawns during the two-day schedule, mow at 3 to 3.5 inches — taller grass shades the soil, reducing evaporation significantly in the July and August heat that southern New Hampshire sees regularly. Kentucky Bluegrass is the most common lawn grass in the Nashua area and will go dormant and brown naturally during dry stretches, but it recovers reliably once rainfall resumes. Do not panic-water a dormant bluegrass lawn in violation of the schedule — dormancy is a survival mechanism, not death. Fine Fescue mixes are increasingly recommended for Nashua homeowners who want lower water demand and better performance in the partial shade common under the region's large sugar maple and white oak canopy trees.

Avoid applying nitrogen fertilizer during dry periods between watering days — pushing top growth when roots are drought-stressed leads to weak turf that is more vulnerable to Necrotic Ring Spot and other fungal diseases that appear in New Hampshire lawns in hot, humid August conditions. If you are overseeding thin areas this fall — which is the ideal window in Nashua, typically mid-August through mid-September — request the new-seed establishment variance from Pennichuck Water Works before you spread seed so you can water more frequently during germination without risking a citation.

Common questions about Nashua water restrictions

What days can I water if my Nashua address is odd-numbered?

If your street address is an odd number — for example, 135 Broad Street — your assigned irrigation days are Monday and Thursday. You may water before 10:00 AM or after 4:00 PM on those days. Automated sprinkler systems running on any other day, or between 10:00 AM and 4:00 PM, are a violation subject to a $75 first-offense citation from Pennichuck Water Works.

Can I water every day if I use a hand-held hose with a shut-off nozzle?

Yes — hand watering with a hose equipped with a positive shut-off nozzle is exempt from the day-of-week restrictions under Pennichuck Water Works' current schedule. The shut-off nozzle is not optional; a free-running hose is not considered hand watering and is subject to the same restrictions as automated irrigation. Drip irrigation systems are also exempt from the two-day schedule.

What is the fine for watering on the wrong day in Nashua?

The first-offense fine issued by Pennichuck Water Works is $75. Violations within a 12-month period escalate beyond that initial amount. Pennichuck enforces through field observation and customer complaints, and AMI meter data can flag unusual usage patterns. If you believe a citation was issued in error, contact Pennichuck at 603-882-5191 before the fine escalates.

I just installed sod. Do I have to follow the two-day schedule?

Pennichuck Water Works typically grants a 21-day establishment variance for newly installed sod, allowing more frequent watering during the critical root-establishment period. This variance is not automatic — you must contact Pennichuck at 603-882-5191 or through pennichuck.com before installation to request and confirm the variance. Installing sod and watering daily without pre-authorization risks a citation even if the sod would otherwise qualify.

Is Nashua under any drought emergency right now?

No. As of the current data, New Hampshire's statewide drought status is Normal and Pennichuck Water Works has not declared an active drought-stage restriction. The two-day watering schedule in effect is Pennichuck's standard year-round baseline program, not an emergency measure. Conditions can change — Pennichuck's Pennichuck Brook impoundments are sensitive to multi-week dry stretches — so check pennichuck.com for current stage status before making major landscaping investments.

Does Pennichuck Water Works offer any rebates for water-efficient irrigation upgrades?

Pennichuck Water Works periodically offers or participates in conservation incentive programs for customers who upgrade to weather-based smart irrigation controllers or install drip systems. Program availability and rebate amounts change — contact Pennichuck directly at 603-882-5191 or visit pennichuck.com to ask about any current rebate offerings. The New Hampshire Electric Co-op and state-level programs through NH DES occasionally run parallel water efficiency incentives for residential customers in the Nashua area.

Can I fill my swimming pool in Nashua right now?

Yes — pool filling is permitted under the current no-active-restriction status. If Pennichuck Water Works elevates to a higher conservation stage, pool filling is typically among the first discretionary uses to be restricted or require pre-scheduling with the utility. For large-volume initial fills, it is good practice to notify Pennichuck in advance so the demand spike does not trigger an automated flag on your account.

My HOA is threatening to fine me for a brown lawn. What can I do?

New Hampshire does not have a state statute that explicitly protects homeowners from HOA fines during utility-mandated watering restrictions. However, complying with Pennichuck Water Works' enforceable schedule is a strong practical defense. Respond to your HOA in writing, reference the Pennichuck schedule and the utility's contact information (603-882-5191), and document your watering compliance with photos and dates. If the HOA does not relent, the NH Attorney General's Consumer Protection Bureau at 603-271-3641 can provide guidance on dispute options available under New Hampshire HOA law.

What time can I water in Nashua?

Watering is allowed Before 10:00 AM and After 4:00 PM. Watering outside these hours is a violation even on your assigned day.

When will water restrictions end in Nashua?

Current No Active Restrictions restrictions are in effect through December 31, 2026. Monitor https://pennichuck.com for the latest status.

How do I report a water waste violation in Nashua?

Contact Pennichuck Water Works at 603-882-5191 or visit https://pennichuck.com. Most utilities accept online reports and respond within 48 hours.