Dry Spots and Uneven Watering? A Mid-Summer Sprinkler Troubleshooting Guide for North Shore Lawns

By mid-July, your lawn is under real stress. The Chicago suburbs are deep into the hot, dry stretch of summer, and this is exactly when a sprinkler system that isn’t running quite right starts to show. One week everything looks lush and green, and the next you’ve got brown patches near the driveway, a suspiciously soggy corner by the garden bed, and a water bill that made you do a double take.

The good news: most mid-summer sprinkler problems come down to a handful of common, fixable causes. Here’s how to spot what’s going wrong on your North Shore lawn — and how to know when it’s time to call in a pro.

Start With a Simple Walk-Through

Before you assume the worst, run your system through a full cycle during the day and walk the yard zone by zone. (Yes, daytime — you want to actually see every head pop up and spray.) You’re looking for four things:

• Heads that don’t pop up at all
• Heads spraying a fine mist instead of steady droplets
• Water spraying onto the driveway, sidewalk, or the side of the house
• Zones that seem to run much shorter or longer than the others

Jot down which zones and which heads look off. That two-minute inventory tells you — and tells us, if you end up calling — most of what we need to know.

Dry Spots: The Most Common Summer Complaint

Brown or crispy patches in an otherwise green lawn almost always point to a coverage problem, not a watering-schedule problem. The usual culprits:

• A clogged nozzle. Illinois summer means dust, grass clippings, and mineral buildup, and it doesn’t take much to partially block a nozzle so it sprays weakly or off-center.
• A tilted or sunken head. Mowers, foot traffic, and settling soil knock heads out of alignment over a season. A head tipped even 15 degrees can throw its spray into the neighbor’s yard instead of yours.
• Blocked spray. Perennials and shrubs grow fast in June and July. A hosta that was small in May can completely block a head by mid-summer.
• A head that isn’t rotating. Rotor heads can seize up, watering one narrow stripe and leaving the rest dry.

Fixing a clogged nozzle or straightening a head is often a quick DIY job. If straightening and cleaning don’t solve the dry spot, the issue may be spacing or water pressure — and that’s worth a professional look.

Soggy Spots and Puddling

The opposite problem is just as common and more damaging. Standing water or a constantly mushy area usually means:

• A cracked line or fitting underground, often from freeze damage that didn’t fully show until the system was under summer pressure.
• A leaking or stuck valve that keeps letting water through even when the zone is supposed to be off.
• A broken head at the base, gushing water instead of spraying it.

Persistent wet spots aren’t just wasteful — they invite fungus, drown roots, and can undermine walkways and foundations. If a spot stays soggy a day after watering, shut that zone off and have it inspected.

Weak Pressure or Misting Heads

If several heads are putting out a fine mist, or the whole system feels weak, you may have too many heads on one zone, a partially closed valve, or a leak upstream stealing pressure. Misting is more than a nuisance: most of that finely atomized water evaporates in the summer heat before it ever reaches the roots, so you pay for water your lawn never drinks.

Your Water Bill Is a Diagnostic Tool

A summer water bill that jumps for no obvious reason is one of the most reliable signs of a hidden leak or a stuck valve. If your usage climbed but the weather didn’t, walk the yard and check your controller’s run times. Speaking of the controller — a smart controller like the Hunter Hydrawise systems we install adjusts watering automatically based on local weather, skipping cycles after rain and dialing back on cool days. It’s one of the simplest upgrades for cutting waste and keeping coverage even through the hottest weeks.

When to Call American National

Some of this you can handle yourself — cleaning a nozzle, straightening a head, trimming back a shrub that’s blocking spray. But if you’re seeing dry spots that won’t resolve, soggy areas that won’t dry out, a spike in your water bill, or pressure problems across multiple zones, those point to issues below the surface that are worth a professional diagnosis.

We’ve been keeping North Shore lawns green for more than 40 years, serving Highland Park, Winnetka, Glencoe, Wilmette, Northbrook, Deerfield, Libertyville, Lake Forest, Glenview, and the surrounding communities. Our technicians can run a full system audit, pinpoint coverage gaps and leaks, and get every zone watering the way it should — before the July heat does lasting damage to your lawn.

Give us a call at (847) 566-0099 to schedule a service visit or a free estimate. A quick tune-up now is a lot cheaper than reseeding a lawn in August.