Duncan Water Restrictions 2026
Stephens County · Oklahoma
Published:
Restrictions Active - Stage 1 Conservation Advisory – Waurika Lake + Lakes Humphreys/Fuqua
3
Days/Week
Before 10:00 AM
Allowed Hours
No fines at Stage 1 Conservation Advisory
Max Fine
Find Your Watering Day
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| Address Ending | Watering Day |
|---|---|
| Odd (voluntary) | Monday & Wednesday & Friday |
| Even (voluntary) | Tuesday & Thursday & Saturday |
Allowed Watering Hours
Duncan Public Utilities Authority draws from three surface-water sources – Waurika Lake (via Waurika Lake Master Conservancy District), Lake Humphreys, and Lake Fuqua – plus city groundwater wells. Duncan currently operates a voluntary Stage 1 Conservation Advisory framework. Recommended best practice is odd/even Monday-Wednesday-Friday / Tuesday-Thursday-Saturday with a 10:00 AM to 6:00 PM mid-day blackout. Hand watering and drip irrigation are always exempt. Historical context: during the 2014 regional drought, Duncan activated Stage 3 rationing limiting outdoor watering to Wednesday and Saturday midnight to 9 AM.
Still Allowed
💧 Hand Watering
Allowed with shut-off nozzle. Hours: Any day with a shut-off nozzle.
🌿 Drip Irrigation
Exempt from day-of-week limits. Must follow allowed hours.
Fines & Enforcement
No fines at Stage 1 Conservation Advisory
Stage 1 Conservation Advisory is voluntary – there are no per-violation fines at the current advisory level. Mandatory enforcement would activate if Duncan Public Utilities Authority declares Stage 2 or higher under the city water conservation ordinance.
Citations begin Statewide drought conditions active🏠 HOA Rules During Restrictions
Oklahoma Residential Property Act (60 O.S. §851) and OK Real Estate Commission guidance establish that municipal water-conservation ordinances supersede conflicting HOA appearance requirements. Duncan's advisory plus any future mandatory stage are 'applicable' under Oklahoma law for HOA-supremacy purposes. Document the active advisory if your HOA sends a violation letter.
If your homeowners association sends a violation notice for a dormant or brown lawn during the current restriction period, respond in writing citing the applicable law and include a copy of the Duncan Public Utilities Authority – Waurika Lake Master Conservancy District + Comanche PWA's current restriction order. Most HOAs will rescind the notice once they are made aware of the legal protections in place. If the issue persists, contact your county’s code enforcement division for assistance.
Why These Restrictions Exist
Duncan is in Stephens County, south-central Oklahoma, approximately 80 miles southwest of Oklahoma City and 30 miles northeast of Lawton. Source water: Duncan Public Utilities Authority draws from Waurika Lake (via the Waurika Lake Master Conservancy District – WLMCD), Lake Humphreys, Lake Fuqua, and city groundwater wells. WLMCD is a regional water-treatment and transmission entity that supplies water to multiple south-central OK municipalities: Lawton, Duncan, Comanche, Temple, Walters, and Waurika.
Duncan is structurally distinct from neighbouring Lawton's framework – although both cities receive Waurika Lake water through WLMCD, Lawton's primary supply is Lake Lawtonka (with Waurika as supplemental) while Duncan's primary supply is local lakes Humphreys and Fuqua (with Waurika as a major supplemental source). The two cities operate completely separate utility frameworks.
Historical context: during the 2014 regional drought, Waurika Lake levels dropped to crisis stage and Duncan activated Stage 3 rationing – outdoor watering limited to Wednesday and Saturday between midnight and 9 AM. Sustained drought across south-central Oklahoma in 2011-2015 stressed the entire Waurika system. Current 2026 conditions are not at that level; the city remains at Stage 1 voluntary advisory.
Statewide context: Oklahoma is in active drought. Stephens County tracks D1 Moderate per the US Drought Monitor. The February 2026 Ranger Road Fire (283,283 acres) drove regional burn bans across central and eastern Oklahoma.
Local context: Halliburton was FOUNDED in Duncan in 1919 (Erle P. Halliburton, oilfield cementing services) and the city retains significant Halliburton operations including the Duncan Manufacturing Operations and several Halliburton corporate facilities. The Chisholm Trail Heritage Center and Stephens County Fairgrounds are cultural anchors. The Duncan area's oil-services industry adds notable industrial water demand to the city's overall consumption profile.
This deficit has accumulated over the current water year and represents a significant departure from historical averages for the Duncan area. Water supply reservoirs and aquifer levels are well below seasonal targets, necessitating mandatory conservation measures.
How to Keep Your Lawn Alive During Duncan Water Restrictions
11 tips tailored for Duncan homeowners during Stage 1 Conservation Advisory – Waurika Lake + Lakes Humphreys/Fuqua restrictions.
Duncan is in south-central Oklahoma, NOT southwestern (that's Lawton). The two cities share Waurika Lake supplemental supply via WLMCD but operate distinct frameworks.
Bermuda dominates Duncan lawns; the south-central Oklahoma climate (hot, dry summers) makes warm-season grasses essential.
Cycle-and-soak on Stephens County red clay-loam soils: 8 minutes on, 30-minute pause, 8 minutes on.
Mulch ornamental beds 3 inches deep with arborist wood chips.
Drip-irrigate trees, shrubs, and vegetable beds – exempt from any current or future day-of-week limits.
Audit sprinkler heads monthly for overspray onto sidewalks and driveways.
Skip scheduled cycles after 0.25 inch or greater rainfall in the prior 48 hours.
Convert parkway strips to Oklahoma natives (Buffalo Grass, Indian Grass, Little Bluestem) – low-irrigation conversion targets.
Track monthly use at duncanok.gov utility portal; high-use accounts may trigger follow-up.
Historical Stage 3 (2014) limited outdoor watering to Wed and Sat midnight-9 AM – plan irrigation around the possibility of similar escalation if Waurika Lake levels drop significantly.
Harvest rainwater off downspouts into rain barrels – Oklahoma law permits residential capture without restriction.
Duncan Water Restriction FAQs
What days can I water my lawn in Duncan?
What hours can I run my sprinklers in Duncan?
What are the fines for water violations in Duncan?
Can I install new sod or seed in Duncan during restrictions?
When will water restrictions end in Duncan?
Is this Duncan, Oklahoma, or Duncan, British Columbia?
Halliburton operations in Duncan – does corporate water use affect my residential supply?
Comanche Pipeline Authority vs Duncan Public Utilities – who sets my rules?
Waurika Lake levels – how do they affect my watering days?
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