Commercial landscape maintenance in Centennial.

Centennial is the trap city on the Front Range, and it trips up national landscape vendors constantly.

Two things everyone gets wrong

First: the "Centennial Water & Sanitation District" does not serve the City of Centennial. It serves Highlands Ranch, in Douglas County. If someone hands you a schedule sourced from that district, it is the wrong schedule for your property.

Second: there is no single Centennial watering rule. The city provides no utilities itself. It's served by a patchwork — the Arapahoe County Water & Wastewater Authority (ACWWA), Southgate Water District, Willows Water District, and Denver Water distributors — and their commercial schedules conflict.

The actual rules, by provider

If ACWWA serves your meter, you're under Stage 3 mandatory conservation measures, in effect since June 15, 2026: a maximum of two days per week, and no watering between 10 a.m. and 6 p.m. Commercial days are assigned by geographic zone:

• Commercial Zone 1 — south of Arapahoe Road and west of Jordan Road: Wednesday and Saturday.
• Commercial Zone 2 — north of Arapahoe Road and east of Jordan Road: Thursday and Sunday.

There is one genuinely significant exception: ACWWA commercial customers on the reclaimed-water (Regulation 84) system are not included in Stage 3. They must still irrigate at or below agronomic rates, but they are not on the two-day cap. If your property is on reclaimed water, you have an operating advantage most of your neighbors don't — and you should know it, because plenty of vendors will restrict you anyway out of ignorance.

If a Denver Water distributor serves your meter (Willows, Southgate), you're on Denver Water's Stage 1 rules: commercial accounts water Tuesday and Friday, no watering 10 a.m. to 6 p.m.

So a commercial property in Centennial might legally water Wednesday and Saturday, or Thursday and Sunday, or Tuesday and Friday — or, on reclaimed water, on a different basis entirely. Four possible answers in one city.

Confirm your provider and their current stage before anyone touches a controller. This reflects rules published as of July 2026.

Why this matters more than it sounds

A landscape vendor running a metro-wide route on a single irrigation schedule is going to be wrong in Centennial. That means one of two things:

1. They're watering on the wrong day — a compliance violation, with the fines and enforcement that follow.
2. They're over-restricting — cutting your irrigation to be safe, on a property that was actually allowed more, and you lose plant material and turf quality for nothing.

Neither is acceptable. The fix is boring and unglamorous: find out who bills the meter, get the current rules from them, and program to those rules specifically. That's what we do on every Centennial property before we touch anything else.

Centennial's commercial grounds

Centennial is business-park country. The Dove Valley Business Park and the corporate and flex inventory around it, the commercial and aviation-adjacent property around Centennial Airport (one of the busiest general-aviation airports in the country, on roughly 1,400 acres), and a substantial base of office, retail corridor, and HOA and metro-district common area.

Business parks and airport-adjacent commercial share a profile: large lots, long frontages, big parking fields, and enormous amounts of nonfunctional turf in medians, islands, and setback strips. It is exactly the ground that Colorado's SB24-005 now prohibits installing new nonfunctional turf on. It is also the most expensive ground on the property per square foot per year — irrigated with heads that spray as much asphalt as grass, mowed with a machine that has to be walked in and out, and used by nobody.

On a two-day watering cap, that turf is going to look bad anyway. Converting it is the obvious move.

What we'd do first

Identify your provider. Run the meter test with the controller off to find leaks. Audit the zones for uniformity and pressure. Reprogram to your actual assigned days. Separate turf from bed and native zones. Then look hard at the medians and islands.

See Irrigation Management, Native & Xeriscape Management, and Enhancements.

Snow is Frontier Snow Care.