Henderson NV Water Restrictions 2026

Current water restrictions in Henderson, Nevada

Henderson is under a Year-Round Mandatory Seasonal Schedule, limiting outdoor irrigation to 3 days per week during spring and enforcing time-of-day restrictions from May through August. These restrictions are permanent, not emergency measures — Henderson Water aligns its rules with the Southern Nevada Water Authority (SNWA) mandatory seasonal watering schedule, the same framework applied across the Las Vegas Valley.

The SNWA established the seasonal watering schedule as a permanent conservation measure tied to Southern Nevada's dependence on the Colorado River. Lake Mead, the primary reservoir serving Henderson via two intake tunnels, has experienced prolonged low water levels due to sustained drought and over-allocation of Colorado River water across seven western states. Nevada holds the smallest Colorado River allocation of any Lower Basin state at 300,000 acre-feet annually, making per-gallon efficiency critical.

Henderson Water administers and enforces local compliance under the city's water ordinance, while SNWA coordinates the valley-wide schedule and conservation goals. Nevada has pursued dramatic cuts — per-person water use in Southern Nevada has dropped 48% since 2002 — and the state has enacted a ban on nonfunctional turf that takes full effect January 1, 2027.

Practically speaking: a Henderson resident cannot freely water their garden on any day or at any hour. From May through August, no outdoor irrigation is allowed between 11 a.m. and 7 p.m., and no irrigation at all is permitted on Sundays. Outside those months, the 3-day-per-week limit still applies based on your assigned watering group. Watering on a Wednesday morning before 11 a.m. is allowed if Wednesday falls within your assigned days — confirm your address assignment through the SNWA website or Henderson Water at cityofhenderson.com.

When can you water in Henderson?

Henderson follows the SNWA group-based address assignment system. Residential properties are assigned a watering group — typically Group A, B, or C — based on the last digit of the street address or by street name range, depending on the zone. The SNWA's "What Day Can I Water?" lookup tool at snwa.com accepts your Henderson address and returns your exact allowed watering days. Group assignments divide the week so that no single day sees the entire valley irrigating simultaneously, reducing peak demand on the Lake Mead intake infrastructure.

Multi-family residential properties and commercial accounts follow the same seasonal schedule but are expected to operate irrigation controllers on the assigned days for their address. Large commercial properties, HOAs managing common-area landscaping, and golf courses may have separate SNWA-issued watering allocations or have undergone turf conversion under the nonfunctional turf removal mandate. Henderson Water can audit commercial irrigation systems on request.

Trees in Henderson's urban canopy deserve priority watering attention within your allowed days. Established Palo Verde trees are highly drought-tolerant once rooted but benefit from deep, infrequent watering during summer. Southern Live Oak and Velvet Mesquite, both common in Henderson landscaping, can experience heat stress if watering is cut too aggressively — drip emitters placed at the drip line qualify as exempt drip irrigation and should be the preferred delivery method for these trees year-round.

Penalty schedule for water violations

Henderson Water enforces violations through a combination of field patrols, customer complaint reports, and smart meter data. The city's advanced metering infrastructure (AMI) system flags anomalous usage patterns — such as high-volume flow during the prohibited 11 a.m.–7 p.m. window in summer — and generates alerts that staff can investigate. Residents can also report violations by contacting Henderson Water through the city's website at cityofhenderson.com. SNWA coordinates a valley-wide Water Waste Hotline that routes Henderson complaints appropriately.

Appealing a water-waste fee in Henderson requires contacting Henderson Water directly and providing documentation — for example, proof that the irrigation ran during a legitimate establishment period, or that a controller malfunction caused the prohibited-hour watering. Response times for complaint investigations are typically within a few business days for residential properties. Persistent or egregious violations — such as irrigating pavement, running broken sprinklers without repair, or repeated Sunday watering — can accelerate the fee escalation timeline.

Other outdoor water rules

Beyond lawn irrigation, Henderson and SNWA prohibit or restrict a range of outdoor water uses. The following rules apply within city limits:

• Decorative fountains and water features: Must recirculate water. Single-pass or flow-through decorative water systems are prohibited year-round.
• Car washing: Must use a hose with a self-closing, shut-off nozzle. Allowing water to run off into gutters or the street is a water-waste violation. Commercial car washes that recycle water are the preferred alternative.
• Pool filling and topping off: Permitted but pools must be covered when not in use to reduce evaporation — Henderson's desert climate causes significant pool water loss during the May–September heat. Newly constructed pools may fill once; subsequent refills are subject to conservation guidance.
• Pressure washing: Must use a shut-off nozzle or a recirculating system. Allowing runoff to flow into streets or storm drains is prohibited and may trigger separate stormwater violations.
• Irrigation runoff: Sprinklers that overspray onto sidewalks, driveways, or streets are a citable water-waste violation regardless of the day or time of watering.
• Drinking water served at restaurants: Nevada state guidance encourages restaurants to serve water only upon request, though this is advisory rather than mandatory under city ordinance.
• Construction water use: Must use recycled or non-potable water where available. Dust suppression using potable Henderson Water supply requires coordination with the city for large projects.

Where Henderson's water comes from

Henderson draws approximately 90% of its water supply from the Colorado River via Lake Mead, the reservoir formed by Hoover Dam on the Nevada-Arizona border. SNWA operates two intake tunnels into Lake Mead — Intake No. 1 at elevation 1,050 feet and Intake No. 2 at elevation 1,000 feet — plus a third low-lake intake tunnel completed in 2015 at approximately 860 feet to ensure access even at critically low reservoir levels. Henderson Water receives treated Colorado River water through the SNWA regional delivery system.

Raw Colorado River water delivered to Henderson is treated primarily at the Alfred Merritt Smith Water Treatment Facility, located near Boulder City, and the River Mountains Water Treatment Facility, which sits partially within Henderson's boundaries. These plants process water through coagulation, sedimentation, filtration, and disinfection before it enters Henderson's distribution system. The River Mountains facility can process up to 400 million gallons per day during peak demand periods.

A smaller portion of Henderson's supply comes from groundwater — specifically, wells drawing from the Las Vegas Valley groundwater basin, a confined aquifer underlying the valley floor. SNWA manages groundwater withdrawals carefully because the basin was historically over-pumped before Colorado River imports became the dominant supply. Groundwater now serves as a supplemental and emergency backup source rather than a primary one.

SNWA's water banking program also stores Colorado River water in Arizona aquifers during high-flow years, crediting Nevada for future withdrawals — an arrangement that gives Henderson indirect access to a stored water reserve. Additionally, Southern Nevada recycles virtually all indoor water: treated wastewater from Henderson homes and businesses is discharged into Las Vegas Wash, flows back to Lake Mead, and is credited against Nevada's Colorado River allotment, making indoor conservation somewhat less impactful than outdoor irrigation reduction.

Can your HOA fine you for a brown lawn?

Nevada Revised Statutes § 116.31075 prohibits homeowners associations in Nevada from fining or penalizing a unit owner for allowing their lawn or landscaping to go brown or die during any period in which a governmental entity has declared or imposed mandatory water restrictions. Because Henderson Water enforces a Year-Round Mandatory Seasonal Schedule, this protection applies continuously — your HOA cannot issue violations or fines for a brown or dormant lawn at any point during the year if you are complying with the mandatory watering schedule.

The statute also bars HOAs from requiring owners to maintain landscaping in a condition that would require violating the mandatory watering restrictions. If your HOA sends a notice demanding green grass or threatening fines during the mandatory seasonal schedule period, you have a direct statutory defense under NRS § 116.31075. The Nevada Real Estate Division, which oversees HOA compliance, can receive formal complaints if an HOA continues to enforce prohibited landscaping requirements.

Use the following as a starting point for a written response to your HOA:

"This notice is to inform [HOA Name] that my property's current landscaping condition reflects compliance with Henderson Water's Year-Round Mandatory Seasonal Schedule, enforced under the Southern Nevada Water Authority mandatory watering restrictions. Under Nevada Revised Statutes § 116.31075, no homeowners association may impose a fine or penalty upon a unit owner for allowing landscaping to die or go dormant during a period of mandatory water restrictions declared by a governmental entity. Henderson Water's mandatory seasonal watering schedule constitutes such a restriction. I respectfully request that this landscaping notice be withdrawn and that no fees or penalties be assessed."

How to manage your lawn during drought

Henderson's climate — classified as a hot desert (Köppen BWh) with summer temperatures routinely exceeding 110°F and annual rainfall averaging under 5 inches — supports a narrow set of turfgrass species. Cool-season grasses die out in summer heat; the viable options are warm-season and desert-adapted varieties.

During the May–August restricted-hours window, schedule your permitted irrigation runs in the early morning before 11 a.m. Bermudagrass in Henderson goes semi-dormant above 95°F if water-stressed — slightly raising your mower height to 1.5–2 inches helps shade roots and reduce moisture loss. Avoid fertilizing Bermuda after mid-August; late-season nitrogen pushes tender growth that cannot harden before cooler fall nights arrive.

Henderson's soils are heavily caliche-dominant in many neighborhoods, meaning water infiltrates slowly and pools before percolating. Running sprinklers in short, repeated cycles — known as cycle-and-soak — rather than one long run prevents runoff violations and gets water deeper into the root zone within your allowed watering window. Residents converting away from turfgrass entirely should investigate SNWA's Water Smart Landscapes rebate program, which pays per square foot of grass replaced with desert-adapted landscaping and can significantly offset conversion costs.

Questions residents are asking

What days can I water at my Henderson address?

Your specific allowed days depend on your assigned SNWA watering group, which is tied to your street address. Use the "What Day Can I Water?" lookup tool at snwa.com and enter your Henderson address — it returns your group assignment and the exact days of the week you are permitted to irrigate. Generally, Henderson addresses are split into three groups cycling across Monday–Saturday, with Sunday prohibited entirely for all addresses valley-wide.

Can I water before 11 a.m. every day during summer in Henderson?

No. You can only water on your assigned 3 days per week, and from May through August, irrigation is prohibited between 11 a.m. and 7 p.m. on those days. So on your permitted watering days during summer, your window is before 11 a.m. or after 7 p.m. — with the early morning window generally preferred to reduce evaporation loss in Henderson's intense afternoon heat.

Does Henderson Water use smart meters to detect watering violations?

Yes. Henderson has deployed advanced metering infrastructure (AMI) across its residential and commercial service area. These meters transmit hourly or near-hourly usage data, allowing Henderson Water to identify high-volume flow events occurring during prohibited hours — such as irrigation running at 2 p.m. in July. Unusual usage patterns generate alerts that staff can follow up on, supplementing the field patrol and complaint-report enforcement systems.

What rebates does Henderson offer for removing my lawn?

Henderson residents can apply for SNWA's Water Smart Landscapes (WSL) rebate program, which pays $3 per square foot for the removal of living grass and replacement with desert-adapted landscaping using low-water plants, decomposed granite, or other approved materials. There is no cap on the rebate per household under current program rules, though the replacement landscaping must meet SNWA design guidelines. Applications must be submitted before removal begins — removing grass first and then applying will disqualify the project. Visit snwa.com/rebates for the current application and approved plant list.

Is drip irrigation exempt from Henderson's watering day restrictions?

Yes. Drip irrigation systems are exempt from both the 3-day-per-week schedule and the May–August time-of-day restrictions. This exemption exists because drip systems deliver water directly to root zones with minimal evaporation and runoff, which aligns with SNWA conservation goals. If you convert your spray-head system to drip for trees, shrubs, or desert plantings, those zones can run on any day at any hour — though watering during peak afternoon heat still wastes water to evaporation even through drip emitters.

Can I wash my car at home in Henderson?

Yes, but only with a hose equipped with a self-closing shut-off nozzle. Leaving a hose running unattended or allowing wash water to flow into the street or gutter is a water-waste violation subject to fees. Commercial car washes that recycle wash water are the more water-efficient option — under Nevada's accounting system, water used indoors (including at commercial car washes) is largely returned to the system via treated wastewater that flows back to Lake Mead.

Will the nonfunctional turf ban affect my Henderson yard in 2027?

Possibly. Nevada's Assembly Bill 356 (2021) bans the irrigation of nonfunctional turf — grass areas that are purely decorative and not used for recreation, sports, or civic functions — in the Las Vegas Valley beginning January 1, 2027. Residential front-yard grass that serves no functional use could fall under this ban, while backyard lawns used for recreation are generally exempt. Henderson Water and SNWA will publish final guidance on residential applicability before the effective date. Homeowners who convert now under the WSL rebate program lock in the current $3/sq ft payment before 2027 compliance becomes mandatory.

What happens if my irrigation controller malfunctions and waters during restricted hours?

A malfunctioning controller is not an automatic exemption from water-waste fees in Henderson. You are responsible for ensuring your system runs within permitted days and hours. If a malfunction occurs, shut the system off at the backflow preventer or controller immediately and document the failure with photos and a service record. When contesting a fee with Henderson Water, submit this documentation in writing. Repeat malfunction citations — where no repair was made — will not be excused and will advance the fee escalation schedule.

What time can I water in Henderson?

Watering is allowed May-Aug: no watering 11am-7pm. No Sundays.. Watering outside these hours is a violation even on your assigned day.

What are the fines for watering violations in Henderson?

First offense: Water-waste fee. Repeat violations: Escalating fees. Contact Henderson Water for the full enforcement schedule.

When will water restrictions end in Henderson?

Current Year-Round Mandatory Seasonal Schedule restrictions are in effect through Year-round. Monitor https://www.cityofhenderson.com for the latest status.

Can I hand water during Henderson water restrictions?

Yes. Hand watering with a hose fitted with a shut-off nozzle is generally allowed on any day during permitted hours. Drip irrigation and soaker hoses are also typically exempt from the day-of-week schedule. Confirm specifics with Henderson Water.