Irrigation Savings Assessment & Water Calculator
See how smart, ET- and rain-aware scheduling differs from a fixed timer—then request a free savings assessment for your HOA, campus, or municipal property. Healthier plants, less water, lower bills.
Understand irrigation savings before you change a single runtime
Property managers and irrigation teams are often asked to “cut water” without a clear picture of what the system is doing today. This page combines two things: an interactive irrigation water calculator that illustrates seasonal waste from calendar-based watering, and a free savings assessment so our agronomists and technicians can review your real-world situation.
The calculator does not replace a site audit or metered flow analysis. It does help boards, facilities directors, and partners explain why weather-responsive irrigation matters: cool months and rainy weeks rarely need the same applied water as peak summer ET, yet many programs still apply an equal monthly share of the annual budget.
- Reference ET (evapotranspiration) describes how fast water leaves the plant–soil system; good programs scale irrigation with ET and effective rainfall.
- Smart controllers and remote management turn runtimes down after rain and up during dry stretches—without abandoning plant health targets.
- Commercial, HOA, and institutional sites benefit most when schedules are reviewed against actual water use and agronomic limits—not just manufacturer defaults.
The calculator below can pull OpenET reference ETo for the month you select (same request style as our standalone ET & rainfall lookup); the standalone tool also loads multi-year precipitation for that month. For a deeper service overview, see water use analysis and water optimization.
Interactive calculator: fixed timer vs ET-aware watering
Enter irrigated area and typical applied water (gallons per square foot per year), then optionally load your site with a U.S. ZIP code. We geocode the ZIP to an approximate centroid, then OpenET returns reference ETo for the month on the slider only (one API request, same pattern as the ET & rainfall lookup). Other months use a built-in seasonal template; the rain graphic uses default wetness until you layer in site-specific precipitation elsewhere.
Your numbers
Fine-tune the model
Smart targets real need; the rest is often lost to runoff, uniformity, and watering the calendar. Default 0.78 is illustrative (see IFAS literature on typical application efficiency).
Pick a month
Fixed timer
ET + rain aware
Where the defaults come from
Outdoor irrigation benchmarks vary widely by climate, plant mix, and metering. Denver Water cites about 12 gal/ft²/year as an efficient mixed-use landscape goal. UF/IFAS-related residential benchmarking has reported much higher observed applied water in some Florida studies (on the order of 38 gal/ft²/year annualized — see Romero & Dukes, CFWC research synthesis PDF via UF). Federal FEMP guidance publishes city-by-city annual irrigation factors for turf and other landscape types. The presets are starting points only — use your bill, meter, or audit and edit the field above.
Frequently asked questions
What does the irrigation water calculator show? It compares a flat monthly share of annual applied water—similar to a fixed timer that does not follow weather—to a seasonal pattern aligned with reference evapotranspiration (ET). Use Load 12-month OpenET data with a U.S. ZIP code: Google Geocoding finds an approximate centroid, then monthly ETo and 5-year average precipitation come from the same OpenET ensemble / gridMET stack as our standalone lookup—or run without loading to see a generic seasonal curve.
Is this the same as a formal water audit? No. It is an educational illustration. Professional water use analysis uses your meters, hydrozones, soil, and local weather.
Why do gallons per square foot per year matter? They normalize outdoor use against irrigated area so HOAs, campuses, and parks can compare against benchmarks and track progress after retrofits or scheduling changes.
What happens after I request a savings assessment? We follow up to learn about your controllers, plant palette, and goals—so recommendations match operations, not generic templates.
High water bills and stressed landscapes don’t have to be the norm
For HOAs, campuses, and municipalities, irrigation often means high water bills, overwatering in some zones and under-watering in others, and hours spent on controller settings. You’re responsible for costs and plant health—but rarely have visibility into what the system is actually doing.
- Surprise water bills — Seasonal spikes and leaks show up too late.
- Dead or stressed plants — Over- or under-watering leads to complaints and replanting costs.
- No visibility — Hard to know if runtimes and schedules match what the landscape needs.
How Irrigation Managers works
We handle the irrigation so you don’t have to. No new software to learn and no need to touch every controller yourself.
We monitor 24/7
We watch your irrigation remotely around the clock and catch issues before they become costly.
AI + agronomists adjust
Our AI and expert agronomists optimize schedules and runtimes for your site and plant needs.
You get alerts and reports
Clear alerts, reports, and recommendations so you and your board or leadership stay informed.
You save water and keep landscapes healthy
Results: healthier plants, less water use, and lower irrigation bills.
Healthier plants, less water, lower bills
- Reduced water usage—many sites see up to 50% less irrigation water.
- Fewer plant losses and fewer complaints from residents or tenants.
- Easier reporting for boards, leadership, or sustainability goals.
- No more guessing at controller settings or reacting to surprise bills.
- One team managing irrigation so you can focus on other priorities.
"We cut our water bill in half while our plants have never looked better."
— Commercial property manager
"Finally, someone who understands agronomy. We don’t touch the controllers anymore."
— HOA board president
Built for the sites you manage
We work with HOAs, business parks, schools and universities, municipal parks, and corporate campuses.
Whether you manage one property or an entire portfolio, we handle the irrigation so you don’t have to.
Find out how much water and money you could save this season
Request your free irrigation savings assessment. We’ll follow up to discuss your site and provide a simple savings estimate.
Not ready to talk yet?
Get our free Irrigation Management Guide—no commitment.