Irrigation System Efficiency Audit in Sun City, Arizona

An irrigation audit in Sun City can lean on more public help than most homeowners realise. EPCOR's Sun City Water District tariff includes a residential audit practice, an on-site landscape consultation and a demonstration garden on Del Webb Boulevard. A professional audit builds on those by measuring what each zone actually delivers, and where the rest goes.

Start with what the water district provides

Outdoors is where most of the water goes: EPCOR's Arizona estimate is roughly 70 percent of a household's use. The district tariff commits EPCOR to offer self-audit information, supply a self-audit kit on request with instructions covering the irrigation system and the meter, help a customer through the audit on request, and check the customer's meter if asked, with meter testing fees applying. The audit kit from EPCOR is small but useful here: a flow bag for reading the meter, a drip gauge, and a landscape watering card to compare against the controller. The tariff also provides on-site consultations on low water use landscaping on request, and EPCOR's West Valley Xeriscape Demonstration Garden at 15626 N. Del Webb Blvd. shows low water use plants with interpretive signs, open free during business hours and on Saturdays.

Following the water off the lot

The useful output of an audit is a zone-by-zone picture: what each station waters, how much it applies, how deep it reaches and where it is lost. Loss often ends at the curb. Street runoff here heads for storm drainage that, along 111th Avenue, the Flood Control District of Maricopa County extended in 2022 from Del Webb Boulevard west to the Agua Fria River, and EPCOR's high water use notice lists sprinklers watering the house, sidewalk or street among the common causes of excess use. Watching each station for water running down the driveway or along the gutter is part of the audit, not an extra. Inside the lot, University of Arizona Cooperative Extension gives the depth targets, with mature roots at 6 to 12 inches for lawn, 12 to 24 for shrubs and 18 to 36 for trees, checked with a soil probe soon after watering. Sun City's groundwater runs 7 to 11 grains per gallon in EPCOR's 2025 report, so emitters and nozzles are checked for scale before the schedule is blamed; the hard water and emitter clogs guide covers that check.

Turning findings into a schedule

AMWUA's regional guidance is to adjust watering at least four times a year, and Extension notes plants use three to five times as much water in hot, dry, windy weather as in winter, so an audit written for July overwaters in January. A good report gives seasonal runtimes per zone, not one number, and notes which zones run onto paving so the fix comes before the schedule. For cooler months, the winter watering guide explains the four-to-six-week rule. If the audit finds a leak, the next step is leak detection in Sun City; if the controller cannot hold a seasonal program, see smart irrigation controllers in Sun City. The general method is on the efficiency audit service page, and every service is listed on the Sun City hub.