A leaking sprinkler system wastes thousands of litres of water every season — and in Calgary, where water rates are climbing and city watering restrictions get tighter every year, that adds up fast. The problem is that most leaks are invisible at first. By the time you notice something is wrong, the damage is already done.
Here are the 7 signs Calgary homeowners should watch for — and what each one usually means.
1. Soggy or Waterlogged Patches on Your Lawn
If one section of your lawn stays wet long after the last irrigation cycle, you have a problem below ground. Soggy patches almost always point to a cracked lateral pipe or a leaking fitting buried just beneath the surface. The water saturates the soil and has nowhere to go, so it pools upward. Do not ignore this — prolonged waterlogging kills grass roots and can undermine your foundation if the patch is near your home.
2. A Sudden Spike in Your Water Bill
Calgary water bills are itemized by consumption. If yours jumps without any obvious reason — no extra watering, no new appliances — your irrigation system is the first place to look. Even a small crack in a buried lateral line can leak 30 to 50 litres per hour. Over a week, that is an invisible flood running under your lawn around the clock.
3. Uneven Watering Across Zones
If one zone of your yard is getting noticeably less water pressure than the others, or if certain zones are leaving dry patches despite the system running, pressure loss from a leak elsewhere in the system is a likely cause. Water follows the path of least resistance — if there is a crack, water escapes before it reaches the sprinkler heads at the end of the line.
4. Sprinkler Heads That Stay Up After the Cycle Ends
Pop-up sprinkler heads should retract fully within seconds of the zone turning off. If a head stays partially or fully extended after the system shuts down, it usually means there is still water pressure being fed from below — often from a leaking valve or a failed solenoid that is not closing completely. This is not just a leak; it is a valve problem that will worsen rapidly.
5. Green Stripes or Unusually Lush Sections
Leaking water acts as an unintentional fertilizer delivery system. If you notice one strip of grass growing significantly greener and faster than the rest, a buried pipe underneath it is almost certainly seeping. This is one of the easiest signs to spot in a Calgary summer — you will see bright green lines cutting across your lawn in the exact path of your lateral lines.
6. Sinkholes or Soft Spots in the Ground
When water leaks underground for long enough, it erodes the surrounding soil and leaves hollow pockets beneath the surface. Walk your lawn after a dry spell — if you feel soft spots, spongy areas, or small depressions that were not there before, sub-surface erosion from a pipe leak is likely. These can collapse into sinkholes over time if left unaddressed.
7. The System Runs Longer Than the Programmed Time
Modern irrigation controllers run zone cycles based on a timer. If your system is running significantly longer than you have programmed — or seems to be constantly running — a pressure sensor fault or a leaking zone valve may be the cause. Some smart controllers will flag this automatically, but older Rain Bird and Hunter timers will not alert you.
What to Do If You Spot These Signs
The first step is a manual zone check. Turn each zone on individually and walk the full perimeter looking for active leaks, wet soil, or heads that are not performing correctly. Note the zone number and the location of the problem.
If the issue is underground — a cracked pipe, a failed coupling, or a leaking valve body — that is not a DIY fix. Excavating, splicing, and pressure-testing irrigation pipe requires the right tools and knowledge of your zone layout. An incorrectly repaired splice is one of the most common reasons systems develop repeat leaks every spring.
J.G. Irrigation provides professional sprinkler repair across Calgary — we diagnose the zone, locate the fault, and fix it right the first time. If your system needs a full assessment before fall winterization, we can include a leak check as part of the blowout inspection. Call 587-433-4795 or book online.
Frequently Asked Questions
How much does a sprinkler system leak cost if I ignore it?
A 4mm crack in a 1-inch pipe leaking at normal Calgary water pressure can waste 10,000 to 40,000 litres per month. At 2026 Calgary water rates, that is $40 to $160 per month in wasted water — plus the repair cost grows the longer it goes unaddressed.
Can I find a sprinkler leak myself?
You can identify the zone and approximate location yourself using the signs above. But locating the exact break underground and making a permanent repair typically requires a technician with pressure testing equipment.
How long does a sprinkler repair take?
Most residential irrigation repairs take 1 to 3 hours depending on the fault. Pipe replacements in compacted soil may take half a day. J.G. Irrigation provides same-week service across Calgary.
Looking for complete irrigation services in Calgary? Visit our Calgary irrigation services hub for a full overview of everything J.G. Irrigation offers — installation, repair, maintenance, winterization, and outdoor lighting across Calgary and surrounding communities.
Written by Jaydon Grover | Owner & Lead Irrigation Technician, J.G. Irrigation
IA Certified Irrigator · Master Low Voltage Lighting Installer · 10+ Years in Calgary Irrigation · WCB Insured
🍂 Fall tip: Calgary’s first frost arrives as early as October 1st. Book your 2026 sprinkler winterization now before slots fill — or see our timing guide and blowout cost guide. Call 587-433-4795.
