Billings MT Water Restrictions 2026

Current water restrictions in Billings, Montana

Billings is under Permanent Seasonal Odd/Even restrictions, limiting outdoor watering to 2 days per week based on your street address number. These restrictions are administered by the City of Billings Water Division, which serves Billings and surrounding communities in Yellowstone County.

The odd/even schedule is a permanent seasonal program — not triggered by an emergency declaration — and applies each year through the outdoor watering season. The current program period runs through December 31, 2026. For current stage status, active drought response measures, or any temporary escalations to the schedule, contact the City of Billings Water Division directly at billingsmt.gov/water or by phone at 406-657-8370.

At the state level, Montana is currently in a drought monitoring phase following snow drought impacts, though no mandatory statewide restrictions are in effect. The City of Billings operates independently of any state-level emergency trigger, meaning local rules apply regardless of state severity status.

Practically speaking: if you live at an even-numbered address and want to water your garden on a Wednesday morning before 10:00 AM, yes, that is allowed. The same even-address resident cannot water on Tuesday or Saturday — those belong to odd-numbered addresses. No outdoor irrigation of any kind is permitted between 10:00 AM and 6:00 PM on any day of the week.

Watering schedule and allowed days

Your assigned watering days are determined by the last digit of your street address number. An address ending in 1, 3, 5, 7, or 9 is odd — water on Tuesday and Saturday. An address ending in 0, 2, 4, 6, or 8 is even — water on Wednesday and Sunday. The address used is the physical service address, not a P.O. box or billing address.

For multi-family and commercial properties, the same odd/even rule applies based on the primary service address street number. If a commercial property or apartment complex spans multiple addresses or has an ambiguous primary number, contact the City of Billings Water Division at 406-657-8370 to confirm which days apply. Irrigation systems serving common areas in HOA communities fall under the same schedule as the address of the main irrigation meter.

Billings sits in a semi-arid climate where late-season dry spells can stress mature trees. Siberian elm, one of the most common street trees in Billings, benefits from deep, infrequent watering during allowed windows rather than shallow daily sprinkles. Green ash, widely planted in established Billings neighborhoods, and cottonwood along the Yellowstone River corridor both perform better when irrigation reaches 12 or more inches of soil depth — achievable by running drip lines or soaker hoses during the full pre-10 AM window on your assigned days.

What happens if you violate restrictions in Billings?

The City of Billings Water Division enforces the odd/even schedule through a combination of complaint-based reports and field staff patrols during peak irrigation hours — primarily early mornings when violations are most visible. Residents can report suspected violations by calling 406-657-8370 or through the city's online contact portal at billingsmt.gov/water. Response times for complaints vary by season and staff availability, but reported violations during active patrol periods can result in same-day or next-day citation issuance.

If you receive a citation you believe was issued in error — for example, if your irrigation controller malfunctioned or you were using an exempt drip system — you can contest the citation by contacting the Water Division directly. There is no separate formal appeals board for first-offense citations; the Water Division handles disputes administratively. Documenting your system type (drip, hand watering, or timed sprinkler) before a dispute arises is advisable.

Other outdoor water rules

Beyond lawn irrigation, the City of Billings Water Division applies water-use expectations to several other outdoor activities. The following uses are subject to restrictions or best-practice guidance:

• Vehicle washing at home: Allowed, but a shut-off nozzle is required on the hose. Washing on a commercial car wash facility is encouraged, as those facilities recycle water.
• Pressure washing: Permitted for maintenance purposes; avoid unnecessary runoff into storm drains, which connect directly to the Yellowstone River drainage system.
• Swimming pool and hot tub filling: Initial fills and top-offs are permitted, but should be done during off-peak hours where possible. Cover pools when not in use to reduce evaporation — Billings's low humidity and wind can remove several inches of water per week during summer.
• Ornamental fountains: Recirculating fountains are allowed. Non-recirculating decorative water features that drain to waste are discouraged under city conservation guidelines.
• Construction site water use: Dust suppression and concrete curing on active construction sites must comply with any city-issued water use permits. Contact the Water Division for large-volume temporary service agreements.
• Sidewalk and driveway washing: Using a hose to wash paved surfaces is discouraged; a broom or blower is the expected alternative except when safety or sanitation requires water.

Water source and infrastructure

Billings draws its municipal water supply primarily from the Yellowstone River, one of the longest undammed rivers in the contiguous United States. The city's intake infrastructure pulls raw surface water from the Yellowstone, which is then processed at the Billings Water Treatment Plant on the city's west side. This facility uses conventional filtration, sedimentation, and disinfection to bring river water up to EPA drinking water standards before distribution.

The Yellowstone River's flow volume is heavily influenced by mountain snowpack in the Absaroka and Beartooth ranges to the southwest and the Bighorn Mountains to the southeast. Seasonal runoff from these ranges feeds the river through spring and early summer. When snowpack accumulation is below normal — as has been observed in recent Montana snow drought monitoring periods — the Yellowstone's summer baseflow can drop significantly, increasing the concentration of sediments and organic material at the intake and raising treatment costs.

Billings also maintains treated water storage reservoirs distributed across the city's pressure zones, which provide emergency capacity and buffer demand during peak summer irrigation hours. These tanks do not represent long-term raw water storage; they hold treated water ready for distribution. The city does not currently rely on a primary impoundment reservoir the way cities like Denver rely on Dillon Reservoir — Billings runs as a run-of-river system, meaning real-time river conditions directly affect supply availability more quickly than reservoir-buffered systems.

Groundwater plays a secondary role in Billings's supply picture. The Yellowstone River alluvial aquifer underlies portions of the valley and is hydraulically connected to the river. Some industrial and agricultural users in the broader Yellowstone County area draw from this aquifer, but the city's municipal system is dominated by its surface water intake. For current supply data and any drought-related intake advisories, check with the City of Billings Water Division at billingsmt.gov/water.

Brown lawn protections in Montana

Montana does not have a specific statute preempting HOA enforcement of lawn appearance standards during declared water restrictions, unlike Colorado (CRS § 37-60-126), Texas (Property Code § 202.007), or Nevada (NRS § 116.31075). Montana's HOA governance framework does not include an equivalent provision protecting homeowners from fines when their lawn browns due to compliance with city-mandated watering restrictions.

That said, HOA boards in Billings do have practical exposure when they fine a homeowner who is visibly complying with the City of Billings Water Division's Permanent Seasonal Odd/Even restrictions. Montana courts generally interpret HOA covenants in light of reasonableness, and an HOA pursuing fines against a homeowner for damage caused by a lawful city water restriction could face a challenge on those grounds. If your HOA issues a fine or violation notice due to lawn condition during the restricted watering period, document your compliance — save your watering schedule, photos with timestamps, and any correspondence with the Water Division.

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

"I am writing in response to the violation notice dated [DATE]. My lawn's current condition is a direct result of compliance with the City of Billings Water Division's Permanent Seasonal Odd/Even outdoor watering restrictions, which limit irrigation to two days per week before 10:00 AM and after 6:00 PM. I am watering on my assigned days ([TUESDAY/SATURDAY] or [WEDNESDAY/SUNDAY]) within permitted hours. I am not in violation of city ordinance, and the reduced irrigation frequency — not neglect — accounts for the lawn's appearance. I respectfully request that this notice be withdrawn."

For further guidance, contact the City of Billings Water Division at 406-657-8370, which can provide written confirmation of current restriction status if needed for HOA disputes.

Lawn care during restrictions

Billings sits in a cool-dry continental climate at roughly 3,100 feet elevation, with hot, low-humidity summers and cold winters. The grasses that perform best under these conditions — and that make the most of a two-day-per-week watering window — are the following:

With only two watering days per week available, mowing height matters more than most homeowners realize in Billings's climate. Kentucky Bluegrass should be kept at 3 to 3.5 inches during summer — cutting shorter exposes the soil to the intense Billings sun and increases evaporation significantly. Watering deeply during your allowed morning window (before 10:00 AM) rather than briefly encourages roots to grow downward, improving drought resilience between assigned watering days. Billings's alkaline soils also benefit from periodic aeration, which improves water infiltration and reduces the runoff that can waste a significant portion of a morning irrigation cycle.

If your lawn repeatedly browns despite compliant watering, consider a partial conversion to Buffalograss or Blue Grama in low-visibility areas such as side yards or parkway strips. These native grasses were established on the northern Great Plains without irrigation for thousands of years and are well adapted to Billings's annual precipitation of roughly 13–15 inches. The City of Billings Water Division may have information on any current turf conversion incentives — contact them at 406-657-8370 or billingsmt.gov/water for current program availability.

Common questions about Billings water restrictions

What days can I water my lawn at my Billings address?

It depends on whether your street address is odd or even. If your house number ends in 1, 3, 5, 7, or 9, you may water on Tuesday and Saturday. If it ends in 0, 2, 4, 6, or 8, your days are Wednesday and Sunday. Watering is only permitted before 10:00 AM and after 6:00 PM on those days. No irrigation is allowed during the midday window regardless of address.

What happens if I get caught watering on the wrong day in Billings?

A first violation results in a $50 citation from the City of Billings Water Division. Subsequent violations within a 12-month period escalate in penalty. Enforcement happens through both staff patrols during morning hours and resident complaints. You can contest a citation you believe was issued incorrectly by contacting the Water Division at 406-657-8370.

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

New sod installations typically receive a 21-day establishment variance from the City of Billings Water Division, which allows more frequent watering during the critical root-establishment period. You must confirm this with the Water Division before installing — do not assume the variance is automatic. Contact them at billingsmt.gov/water or 406-657-8370 to register the installation and receive written confirmation of your establishment watering allowance.

Is drip irrigation exempt from the odd/even schedule in Billings?

Yes. Drip irrigation systems are exempt from both the day restrictions and the 10:00 AM–6:00 PM prohibited window. This makes drip a practical option for vegetable gardens, flower beds, and the base of established trees like Siberian elm or green ash, which need consistent soil moisture without triggering watering-day limits. Ensure your drip system is properly maintained and not wasting water through leaks or misaligned emitters.

Can I wash my car at home in Billings?

Yes, residential vehicle washing is permitted, but you are required to use a hose with a shut-off nozzle — a continuously running hose is not compliant with city water conservation standards. Using a commercial car wash, most of which recycle wash water, is the more water-efficient alternative and avoids the soapy runoff that flows into Billings's storm drain system, which discharges to the Yellowstone River.

Does the Billings Water Division use smart meters to catch irrigation violations?

The City of Billings Water Division has been modernizing its metering infrastructure. Whether your property currently has an advanced metering infrastructure (AMI) smart meter capable of flagging unusual usage patterns depends on where your service falls in the upgrade rollout. Regardless of meter type, violations are also detected through visual patrols and neighbor reports. Contact the Water Division at 406-657-8370 to ask about your meter type and whether your usage data is being monitored in near-real time.

Does Montana's drought monitoring status affect my Billings watering schedule?

Not directly. Montana is currently in a drought monitoring phase following snow drought concerns, but the state has not issued mandatory restrictions. Billings's Permanent Seasonal Odd/Even schedule is a year-round city program, not tied to state emergency declarations. However, if drought conditions worsen significantly, the City of Billings Water Division has the authority to escalate to more restrictive stages. Monitor billingsmt.gov/water for any stage changes during dry periods.

Are there any rebates or programs for Billings residents who want to reduce outdoor water use?

The City of Billings Water Division periodically offers or promotes conservation programs, which may include rebates for water-efficient irrigation controllers, turf conversion assistance, or WaterSense fixture incentives. Program availability changes year to year and may depend on grant funding. Contact the Water Division at billingsmt.gov/water or 406-657-8370 to ask what programs are currently active and whether your property qualifies.

What time can I water in Billings?

Watering is allowed Before 10:00 AM and After 6:00 PM. Watering outside these hours is a violation even on your assigned day.

When will water restrictions end in Billings?

Current Permanent Seasonal Odd/Even restrictions are in effect through December 31, 2026. Monitor https://billingsmt.gov/water for the latest status.

Can I hand water during Billings 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 City of Billings Water Division.

How do I report a water waste violation in Billings?

Contact City of Billings Water Division at 406-657-8370 or visit https://billingsmt.gov/water. Most utilities accept online reports and respond within 48 hours.