Manhattan KS Water Restrictions 2026

Current water restrictions in Manhattan, Kansas

Manhattan is under a Permanent Odd/Even Watering Ordinance, limiting outdoor irrigation to 2 days per week based on your street address number, with no outdoor watering allowed between 10:00 AM and 5:00 PM on any day.

This is not a temporary emergency measure — the City of Manhattan Utilities established this ordinance as a standing year-round rule for all residential and commercial customers. The permanent status reflects Manhattan's long-term strategy for managing demand on Tuttle Creek Reservoir, the city's primary water supply, which sits at approximately 68% capacity as of April 2026. Riley County is currently classified under D1 Moderate Drought conditions according to the U.S. Drought Monitor, putting additional pressure on the reservoir.

At the state level, Kansas as a whole is in drought monitoring status, with mandatory restrictions concentrated in western Kansas. Manhattan's Riley County designation is more acute than the statewide picture, making local compliance especially relevant this season.

Manhattan Utilities administers the ordinance and handles all enforcement, fines, and exemption requests. You can reach them at 785-587-2480 or through cityofmhk.com.

Practically speaking: no, a resident cannot water their garden on a Wednesday morning. Wednesday is not an assigned watering day under any address designation. A resident at an odd-numbered address — say, 1407 Poyntz Avenue — may water only on Monday and Thursday, and only before 10:00 AM or after 5:00 PM. Total outdoor irrigation should not exceed 1 inch per week, regardless of assigned days.

Manhattan is recognized as a conservation leader among Kansas municipalities, in part because of its proximity to Kansas State University, whose research partnerships have shaped the city's data-driven approach to municipal water management and drought response.

Watering schedule and allowed days

Your assigned watering days are determined by the last digit of your street address number. If your address ends in 1, 3, 5, 7, or 9, you are an odd address and may water on Monday and Thursday. If your address ends in 0, 2, 4, 6, or 8, you are an even address and may water on Tuesday and Friday. Saturday and Sunday are not assigned watering days under the current ordinance, and Wednesday is not a permitted day for any address. If you are unsure of your designation, Manhattan Utilities can confirm it by phone.

Multi-family residential properties and commercial accounts follow the same odd/even framework based on their service address. Large commercial properties — such as university-adjacent apartment complexes along Anderson Avenue or Bluemont Avenue — that have multiple building addresses on a single account should contact Manhattan Utilities directly to clarify which address number governs their schedule. The city's education-first enforcement approach for commercial accounts means a representative will typically explain the rules before issuing a citation.

Within Manhattan's urban tree canopy, bur oak, eastern redbud, and honeylocust — all well-established throughout Citywide parks and residential neighborhoods — benefit most from deep, infrequent watering concentrated at the drip line during your assigned early-morning window. Directing irrigation to established trees on your scheduled days is more efficient than frequent shallow watering and keeps trees stress-tolerant through Riley County's dry summer stretches.

What happens if you violate restrictions in Manhattan?

Manhattan Utilities enforces the ordinance primarily through complaint-based patrols and field staff observation. Utility crews and inspectors monitor neighborhoods — particularly during the midday blackout window — and respond to resident reports filed through the city's utility contact line at 785-587-2480. The city does not currently publish a dedicated online complaint portal for watering violations, so phone reporting is the standard channel. Citations are issued by utility staff rather than police, and the fine structure escalates based on repeat violations within a rolling 12-month window.

For residential customers who receive a citation and believe it was issued in error — for example, if drip irrigation was mistaken for sprinkler use — there is an informal dispute process through Manhattan Utilities. Customers should call the utility office, reference their account number, and request a review before the payment deadline. Commercial property managers facing a first contact should expect an educational visit explaining the ordinance before any monetary penalty is applied, consistent with the city's stated enforcement philosophy.

Other outdoor water rules

Beyond scheduled lawn irrigation, Manhattan's ordinance and utility guidelines address several other outdoor water uses. The following rules apply city-wide:

• Vehicle washing: Washing cars, trucks, and recreational vehicles at home is permitted but must use a hose with a functional shut-off nozzle. Commercial car washes are not subject to residential day restrictions.
• Pool filling and top-off: Filling new swimming pools or significantly topping off existing ones during drought periods should be coordinated with Manhattan Utilities; large-volume fills may require advance notice. Routine evaporation top-off with a shut-off nozzle is generally permitted.
• Pressure washing: Allowed for health and safety purposes (mold, mildew, surface prep for painting). Purely aesthetic pressure washing of driveways or patios is discouraged during D1 drought conditions.
• Fountains and water features: Ornamental fountains not equipped with recirculating pumps should be shut off. Recirculating systems are permitted.
• Drip and soaker irrigation: Exempt from the odd/even schedule and time-of-day restrictions. These systems may run any day at any hour.
• Hand watering with shut-off nozzle: Fully exempt from day and hour restrictions. A hose without a shut-off nozzle is not compliant.
• Construction water use: Contractors performing dust suppression or concrete curing on active job sites should contact Manhattan Utilities for project-specific guidance, particularly on larger commercial developments near the KSU campus corridor.

Water source and infrastructure

Manhattan draws its municipal water supply almost entirely from Tuttle Creek Reservoir, located on the Big Blue River approximately 5 miles north of the city in Riley County. Tuttle Creek is a U.S. Army Corps of Engineers reservoir with a conservation pool capacity of roughly 394,000 acre-feet. As of April 2026, the reservoir sits at 68% of conservation pool capacity, a meaningful deficit that underlies the city's conservation emphasis heading into the summer demand season.

The Big Blue River and its tributaries — including the Mill Creek and Black Vermillion drainages — feed Tuttle Creek. Watershed conditions in the Flint Hills and eastern Kansas uplands directly influence reservoir replenishment rates. During D1 Moderate Drought periods like the current one, inflows slow considerably, and the reservoir does not recover as quickly from evaporation and withdrawal losses.

Raw water from Tuttle Creek travels to the City of Manhattan Water Treatment Plant, which uses conventional treatment including coagulation, sedimentation, filtration, and disinfection before water enters the distribution system serving approximately 55,000 residents. The treatment plant's capacity and the reservoir's storage margin together determine how tightly the city needs to manage outdoor demand in any given season.

Unlike municipalities in western Kansas that draw from the Ogallala Aquifer — a declining fossil water resource — Manhattan's surface water supply from Tuttle Creek is renewable but highly sensitive to annual precipitation patterns and regional drought cycles. Kansas State University's engagement with watershed monitoring and drought forecasting through programs based on the Manhattan campus gives city planners unusually detailed, localized data on Tuttle Creek inflows and projected storage trends, informing both the permanent ordinance structure and any decisions about escalating to tighter restrictions.

There are no significant groundwater backup sources currently used for Manhattan's municipal supply. The city's dependence on a single surface reservoir makes Tuttle Creek's health the most direct indicator of how aggressively restrictions may tighten in future drought years.

Brown lawn protections in Kansas

Kansas does not have a specific state statute equivalent to Colorado's CRS § 37-60-126 or Florida's FS § 720.3075 that explicitly prohibits HOAs from fining homeowners for brown or drought-stressed lawns during declared water restrictions. There is no Kansas statute on record that preempts HOA enforcement of lawn appearance standards during municipal watering restrictions.

That said, many Kansas HOA governing documents contain language acknowledging compliance with local ordinances as a defense against appearance violations. If your HOA in Manhattan — such as those governing planned communities near Scenic Drive or developments west of Seth Child Road — issues a warning or fine for a brown lawn while you are complying with the Permanent Odd/Even Watering Ordinance, you have a practical argument even without a specific statute. Document your compliance: photograph your irrigation system timer settings, note your assigned watering days, and retain any correspondence with Manhattan Utilities.

Use this template when responding to your HOA:

"This notice is to inform the [HOA Name] board that the lawn condition at [your address] reflects compliance with the City of Manhattan Permanent Odd/Even Watering Ordinance, administered by City of Manhattan Utilities (785-587-2480). Under this ordinance, outdoor irrigation is limited to two assigned days per week with a maximum of 1 inch per week, and no watering is permitted between 10:00 AM and 5:00 PM. Any lawn browning is a direct result of adhering to mandatory municipal conservation rules. I respectfully request that this citation be withdrawn pending a review of the applicable ordinance."

If the HOA does not respond appropriately, contact Manhattan Utilities to request written documentation of the ordinance requirements, which can be submitted to the HOA board or an attorney if necessary.

Lawn care during restrictions

Manhattan sits firmly in the transition zone, meaning both warm-season and cool-season grasses are viable, but each has a different stress profile under the current 2-day watering schedule and D1 drought conditions.

In Manhattan's climate, the most important summer adjustment is mowing height. Tall fescue lawns — common in older Manhattan neighborhoods — should be kept at 3.5 to 4 inches during July and August to reduce soil moisture evaporation and protect roots from heat stress. Bermudagrass can be mowed shorter (1.5 to 2.5 inches) without the same heat risk, as it is naturally adapted to the continental extremes of northeast Kansas summers. Avoid mowing any lawn when soil is dry and temperatures exceed 95°F, which is common in Riley County from late June through August.

Use your two assigned morning watering windows — before 10:00 AM — to apply the full weekly inch in as few cycles as your soil can absorb without runoff. Clay-heavy soils common in the Flint Hills transitional region around Manhattan benefit from cycle-and-soak programming: run sprinklers for 10-12 minutes, pause for 30 minutes, then run again, rather than one long continuous cycle. This reduces runoff into storm drains and ensures water penetrates to root depth rather than evaporating off the surface.

Common questions about Manhattan water restrictions

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

Odd-numbered addresses — those ending in 1, 3, 5, 7, or 9 — are permitted to water on Monday and Thursday only, either before 10:00 AM or after 5:00 PM. No other days are permitted for automatic or sprinkler irrigation. Hand watering with a shut-off nozzle and drip irrigation are exempt from this day restriction and may be used any day.

Can I water on Saturday or Sunday in Manhattan?

No. Under the Permanent Odd/Even Watering Ordinance, neither odd nor even addresses have Saturday or Sunday as assigned watering days. Weekends are off-limits for sprinkler and automatic irrigation systems regardless of your address. If you need to water on a weekend, only hand watering with a shut-off nozzle or drip irrigation qualifies as exempt.

What is the fine if I water on the wrong day in Manhattan?

City of Manhattan Utilities issues a $25 citation for a first offense. A second violation within 12 months costs $75. Commercial properties typically receive an educational contact before a citation is issued. Fines are assessed by utility staff, not law enforcement, and can be disputed by calling Manhattan Utilities at 785-587-2480.

How does Manhattan Utilities find out I violated the watering schedule?

Enforcement is primarily driven by field observation by utility staff and neighbor complaints called in to 785-587-2480. Utility crews conducting routine work in neighborhoods may note violations, particularly during the 10:00 AM–5:00 PM blackout window when running sprinklers are easy to spot. Manhattan does not currently publish documentation of automated smart-meter-based irrigation detection, so in-person observation and complaint response remain the main enforcement mechanisms.

I just installed new sod — do I have to follow the 2-day schedule?

New sod installations qualify for a 21-day establishment variance that allows more frequent watering outside the standard odd/even schedule. You must register for this variance with City of Manhattan Utilities before or immediately after installation by calling 785-587-2480. Without registering, you are subject to the standard ordinance and could be cited even if your sod is dying. Once the 21-day window closes, you revert to your assigned address-based schedule.

Does Tuttle Creek Reservoir's current level affect how strict the restrictions might get?

Yes, potentially. Tuttle Creek is currently at 68% of conservation pool capacity, and Riley County is in D1 Moderate Drought. The Permanent Odd/Even Ordinance is the baseline, but Manhattan Utilities can escalate to more restrictive stages — such as reducing permitted days or tightening the time window — if reservoir levels drop further or drought intensifies to D2 or D3 classification. Monitoring the U.S. Drought Monitor for Riley County and checking cityofmhk.com gives you early warning of any escalation.

Can I wash my car at home in Manhattan right now?

Yes, residential vehicle washing is permitted, but you must use a hose with a functional shut-off nozzle. Letting the hose run unattended or without a shut-off device is not compliant with conservation requirements. Commercial car washes are not subject to the residential odd/even day restriction and are a water-efficient alternative during restricted periods, as most recirculate a portion of wash water.

Does Manhattan or Kansas State University offer rebates for switching to drought-tolerant landscaping?

Manhattan Utilities has historically promoted conservation through public education partnerships with Kansas State University's extension programs, which offer guidance on converting turf to buffalograss or native Flint Hills prairie plantings — both dramatically lower in water demand than traditional fescue lawns. For current rebate programs or cost-share opportunities, contact Manhattan Utilities directly at 785-587-2480 or visit cityofmhk.com, as program availability changes seasonally. KSU Extension in Riley County (located at 110 Courthouse Plaza, Manhattan) is also a practical resource for free plant selection and irrigation efficiency guidance specific to northeast Kansas conditions.

What time can I water in Manhattan?

Watering is allowed Before 10:00 AM and After 5:00 PM. Watering outside these hours is a violation even on your assigned day.

What are the fines for watering violations in Manhattan?

First offense: $25 first · $75 second. Repeat violations: Manhattan Utilities issues $25 first-offense citations and $75 for second within 12 months. Education-first enforcement for commercial.. Contact City of Manhattan Utilities for the full enforcement schedule.

When will water restrictions end in Manhattan?

Current Permanent Odd/Even Watering Ordinance restrictions are in effect through Permanent ordinance. Monitor https://www.cityofmhk.com for the latest status.

How do I report a water waste violation in Manhattan?

Contact City of Manhattan Utilities at 785-587-2480 or visit https://www.cityofmhk.com. Most utilities accept online reports and respond within 48 hours.