RepairUpdated June 21, 2026
Seeing rusty or brown water come out of your taps can be unsettling. Around McHenry, this issue often points to a problem with supply pipes, water lines, or fixtures. Discolored water isn't just unpleasant, it can mean your plumbing needs attention soon to prevent leaks, water pressure issues, or even pipe failure.
Why Discolored Water Is Common in Older McHenry Homes
Many houses in our area were built between the 1950s and 1990s. Quite a few still have galvanized steel or cast iron pipes in place. Over time, these pipes corrode inside. As rust builds up, small flakes break loose and end up in your water, especially after periods of low use or if your main line has been disturbed by street work. Sometimes, the first sign is a brown or orange tint when you run the tap after it's been off for a while.
With our region's regular freeze-thaw cycles and cold winters, aging pipes are put under extra stress. Expansion and contraction cause cracks and more interior corrosion. Clay-rich soil and a moderate to high water table in McHenry can speed up exterior pipe deterioration too.
Main Causes of Rusty or Brown Water
- Corroded galvanized or cast iron supply lines. These eventually rust on the inside, sending flakes into your water.
- Water line breaks or repairs. Disturbance in the city supply or a leak lets more sediment flow into your pipes.
- Hot water heater rust. If only your hot tap is discolored, the issue may be inside your tank or anode rod.
- Municipal flushing or hydrant use. System flushing stirs up iron sediment that reaches nearby homes temporarily.
- Old fixtures. Sometimes older faucets or pipes in a single room shed rust internally.
McHenry's municipal water comes from the Fox River, and while it's treated and considered moderate in hardness, old pipes can still discolor the supply by the time it reaches your sink.
What to Watch for With Rusty Water
If your water is rusty or brown for more than a few hours, take it seriously. Staining on laundry or fixtures is one clue. Sometimes, you'll notice a metallic taste or your water pressure drops. Interior pipe rust doesn't fix itself and tends to get worse, not better, with time.
- Water looks brown, red, or orange, especially when first turned on
- Discoloration continues for more than 24 hours
- Both hot and cold taps show the problem
- Laundry gets stained
- Pressure drops or you hear banging in the pipes
- You live in a home built before 1980 and pipes haven't been updated
If only the hot water is rusty, the issue might be with your heater. Our water heater services include checking for a failing anode rod or tank rust. If cold taps are also affected, the main water line or older supply lines are likely to blame.
What Our Crew Looks for When Diagnosing Rusty Water
Our team checks both the age and material of your pipes. Galvanized steel gets replaced most often, followed by cast iron in some older ranch or Cape Cod homes. We inspect visible pipes and, if necessary, cut into the wall to confirm what's hidden. In some cases, a city-side water disturbance is temporary. If not, we'll use water pressure gauges, check for leaks, and check for sediment buildup.
When water discoloration comes from a failing line in the yard, we may recommend repiping or targeted repairs. We'll also check your main shutoff and any pressure reducing valves (PRVs) for proper function. If the problem tracks back to a leak underground, we provide leak detection and repair using acoustic listening and pressure testing equipment.
How to Respond and When to Call a Licensed Plumber
- Run cold taps for several minutes. If the color clears, it may have been a short-term disturbance. If not, you likely have pipe or line corrosion.
- Check if the color is in both hot and cold water. Hot only may point to the water heater (see our services).
- If you see stains on fixtures, stop using hot water for laundry and baths until the issue is checked.
- Note any water pressure changes or strange pipe noises.
- Inspect your basement or crawl space for signs of leaks or puddling near where the water line enters the home.
- Contact your water supplier to see if any street-level repairs or flushing were done recently.
- Call a professional plumber, especially if the problem lasts more than a day or there are other symptoms (pressure loss, staining, leaks).
If you live in a flood-prone or high water table area, regular checks of your sump pump system can help keep your basement dry in the event of a leak or water line break. For water main failures or urgent issues, our water line service team can assess and repair pipe damage before small issues become bigger ones.
How We Repair and Replace Water Lines
Once we confirm that the water discoloration is caused by corroded or failing lines, we help you review your options. For small sections with visible rust, we can often replace just those segments. But if you've got widespread galvanized or cast iron, full repiping may be your best long-term fix.
We use copper or modern PEX supply lines, which are far more resistant to corrosion. Exterior lines running through McHenry's clay soil may need extra depth or sleeves to protect against moisture and soil movement. If the problem started with a suspected leak, we'll pair the repair with a fresh pressure test to confirm all connections hold under full use.
For newly built or remodeled homes, updated materials and careful installation techniques provide years of clean, clear water. Our team is careful to address both visible and hidden runs of old pipe so you don't end up with partial fixes.
If you notice rusty water in your Mchenry home, call our licensed plumbers at 779-244-6939. Our crew handles inspection, repairs, and line replacements backed by decades of hands-on work in McHenry County. We're here to keep your water clear and your plumbing safe.