5 Signs You Have a Hidden Irrigation Leak

A hidden leak is like a silent thief—it steals your money and damages your property without you even noticing until the bill arrives. Here is how to catch it early.

In the Arizona desert, irrigation systems are under constant stress from heat, hard water, and root intrusion. While a broken sprinkler head is obvious (hello, geyser!), underground leaks can persist for months undetected.

1. Unexplained Spike in Water Bill

This is usually the first red flag. If your water usage jumps significantly without a change in your habits or the season, you likely have a leak. Compare your current bill to the same month last year to verify.

2. Wet Spots or "Squishy" Ground

Walk your yard after the system has been off for a few hours. If you find areas that are muddy, mossy, or feel soft underfoot, water is likely pooling underground. This often indicates a cracked lateral line or a leaking valve.

3. Loss of Pressure

Are your sprinkler heads not popping up all the way? Or is the spray pattern weak and not reaching its target? A leak in the line reduces the overall system pressure, causing heads to underperform.

Note: This can also be caused by a failing valve or clogged filter, so professional diagnosis is recommended.

4. Overly Green Areas

In a dry landscape, if one patch of grass or weeds is significantly greener and taller than the rest, it's getting extra water from somewhere. Follow the green!

5. The Meter Test

The definitive way to confirm a leak:

1. Turn off all water inside the house (faucets, dishwasher, etc.).
2. Locate your water meter (usually near the street).
3. Check the "leak indicator" (a small triangle or dial). If it's moving, water is flowing.
4. Shut off the irrigation isolation valve. If the meter stops moving, the leak is in your irrigation system.

Common Leak Sources

• Broken PVC Pipes: Often caused by root intrusion or shifting soil.
• Leaking Valves: Worn-out diaphragms can cause valves to "weep" constantly.
• Drip Lines: Emitters can pop off, or lines can be chewed by wildlife.

Conclusion

Regular inspections are the best defense against hidden leaks. By catching them early, you save water, money, and your landscape.