How do we cut our HOA's common area water bill with an irrigation audit?

By OurHOA · General information · Revised September 24, 2026

How an HOA board cuts the common area water bill: read the meters, walk each zone, hire a certified irrigation auditor, fix leaks and pressure, follow watering rules.

Part of the HOA board handbook: vendors, projects and upkeep.

Measure first, fix second, reschedule last

Most of the water an HOA wastes on irrigation goes three ways: leaks and broken heads nobody sees because the system runs at 4 a.m., water pressure too high for the nozzles, and a controller still running its July schedule in October. An irrigation audit finds all three. The board's job is to put numbers on the problem, get the system checked zone by zone, fix what the audit finds in order of gallons saved, and then set a schedule that fits the weather and the local watering rules. EPA's WaterSense program says this kind of work can cut a property's outdoor water use by more than 50 percent, and it recommends a full audit by a certified auditor every three years. Treat that as a ceiling, since a system with new heads and a smart controller has less to gain. Watering days, turf rules and landscaping rights vary by state, by water provider and by your governing documents, so read this as education, not legal advice.

Pull two years of water bills before anyone touches a valve

Ask the treasurer for 24 months of bills for every meter the association pays. Build a sheet with one row per month and one column per meter, and record gallons or hundred cubic feet, whichever unit the utility bills in, because a rate increase can hide a drop in use. Note which meters serve only irrigation and which also feed the clubhouse or pool. Three patterns tell you where to look. Winter use on an irrigation-only meter that should be shut down points to a leak or a controller nobody turned off. A summer month far above the same month last year, with similar weather, often means a stuck valve or a broken line. A slow climb year over year usually means heads, nozzles and schedules drifting out of adjustment. EPA estimates that broken sprinkler parts at one home can waste up to 25,000 gallons and $280 over a six-month season, and a common area system has far more heads than a house. If the association has no separate irrigation meter, ask the utility what one costs. EPA's commercial guidance recommends dedicated irrigation meters so a property can measure use before and after an upgrade and show what the work saved.

Walk every zone once a month

A volunteer or the landscaper can do the first pass. Set the controller to manual, run one zone for two or three minutes, and walk it while it runs. On a zone sheet, note each problem by location: broken or missing heads, heads tilted or sunk below the grass, spray hitting sidewalks, streets, walls or the entry sign, misting at the nozzle, which usually means the pressure is too high, soggy ground or water bubbling up between heads, and valve boxes with standing water. Then move to the next zone. EPA's checklist for homeowners boils this down to inspect, connect, direct and select, and its commercial guide says to train staff and contractors to walk the system often and report wet spots on pavement and in beds. Write the monthly walk and a one-page report to the board into the landscaping contract instead of assuming it happens. Our guide on how to write an HOA request for proposal shows how to word scope lines so every bidder prices the same job. In Texas, keep volunteers to looking and flagging. Occupations Code 1903.251 requires a state irrigator license to install, maintain, alter, repair or service an irrigation system. The exemptions in section 1903.002 cover an owner working at their own home and a business's employee working on its own premises, and a director fixing common area heads on a Saturday fits neither one as written.

What a professional audit should deliver

Every three years, and before any large spending decision, pay for a full audit. EPA and its certifying partners keep a searchable directory of professionals certified by WaterSense labeled programs, with a filter for irrigation system audit. EPA points auditors to the ANSI/ASABE S626 standard for uniformity and application rate testing. In practice that is the catch-can test: the auditor sets cups across a zone, runs it, and measures how evenly the water lands. Put the deliverables in the engagement letter. You want a zone map showing plant type, sun exposure and sprinkler type for each zone, static and operating pressure readings, precipitation rate and uniformity for the turf zones, a repair list with a price and estimated water savings for each item, and a recommended run schedule by month. EPA notes that spray nozzles work best at roughly 30 to 45 psi and that incoming pressure commonly tops 60 psi, so a report without pressure numbers has skipped the fix that often pays back fastest. Ask whether the auditor also sells or installs equipment. If so, get the repair pricing from a second contractor.

Fix things in order of gallons saved

Leaks, broken heads and stuck valves come first. They waste water every cycle and cost little to fix. Pressure is next: EPA says WaterSense labeled pressure-regulating spray bodies can cut spray sprinkler use by more than 20 percent where incoming pressure is above 60 psi, and one pressure-regulating valve can cover a whole system. The controller comes third. EPA says a properly installed WaterSense labeled controller, which adjusts to weather data or soil moisture, can cut irrigation use by 15 to 30 percent, and Florida field studies it cites found homes with soil moisture controllers used 30 percent less irrigation water than homes on clock timers, while homes with a rain sensor used 14 percent less. In Florida the rain sensor is the law. Section 373.62 requires anyone who installs an automatic landscape irrigation system to install, maintain and operate technology that stops it when there is enough moisture, and a licensed contractor who works on the system must test that device. Last, look at the plants. Turf on a steep slope or a narrow strip along a curb is hard to water without runoff. In Colorado, check the law before replanting. C.R.S. 37-99-103, added by SB24-005, bars local governments from allowing new nonfunctional turf, artificial turf or invasive plants on common interest community property, starting January 1, 2026, as part of a new development or redevelopment project. A redevelopment project needs a permit, plan check or design review and disturbs more than half of the landscape area. Turf that is regularly used for recreation counts as functional, and existing turf may be maintained.

Set the schedule by the local rules and post it

Your water provider decides when the system may run, and its rules beat anything in the landscaping contract. In South Florida the water management district's year-round rule limits most landscape watering to two or three days a week and bans it between 10 a.m. and 4 p.m. Its fact sheet puts homeowner associations with both odd and even addresses in the even-address group, which in two-day areas means Thursdays and Sundays. Reclaimed water, harvested rainwater and hand watering with a shut-off nozzle may be used any time. Other districts and cities set their own days, so call your utility and get the rule in writing. Post the schedule in the controller cabinet and review it each spring and fall. Two state rules limit what the board can demand of owners while it cuts back. Texas Property Code 202.008 bars an association from fining an owner for brown or discolored grass while a government watering restriction is in effect and until the 60th day after it is lifted, and section 202.007 bars covenants that prohibit drip irrigation or drought-resistant landscaping on an owner's lot. In Colorado, section 38-33.3-106.5(1)(i.5) requires every association to preapprove at least three water-wise garden designs for the front yards of detached homes and to post them on its public website if it has one. Our guide on whether an HOA can make you water your lawn during a drought covers the owner side.

A sample year and a motion to copy

January: pull 24 months of bills and build the meter sheet. February: ask the utility about rebates on controllers, nozzles and turf conversion, and whether the program requires approval before you buy. March: get quotes from two certified auditors. April, at spring startup: audit, first zone walk, and repair of leaks and broken heads. May: the board votes on pressure and controller work. June through September: monthly zone walks with a one-page report. October: compare gallons against the same months last year, adjust the fall schedule, and winterize where freezes occur. A motion the board can adapt: 'Move to engage [auditor], a WaterSense certified irrigation auditor, to audit the common area irrigation system for no more than $[amount], with a written report that includes a zone map, pressure readings, a priced repair list and a monthly run schedule, to be presented at the [month] board meeting.'

Mistakes that erase the savings

Cutting run times without fixing coverage, which browns the dry spots while the soggy ones stay soggy. Letting the landscaper find, price and bill every repair with nobody checking the list against the audit. Buying a smart controller and leaving it on factory settings. Assuming a well or reclaimed-water system follows the same rules as city water. Changing the schedule without telling owners, then fielding complaints about sprinklers at 2 a.m. And skipping the follow-up: if nobody compares gallons before and after, the board can't tell owners what the work saved or defend the line in next year's budget.

Sources

These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.

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