It is common for tap water in St. Paul and the Minneapolis metro area to appear a bit cloudy. There are a few reasons why this could be happening. Generally, this is something harmless and does not affect the safety or general quality of your drinking water.
Most of the time, if your tap water appears a bit cloudy, it is because tiny air bubbles are trapped in it. An easy way to test for this is to fill up a glass with cold tap water. After a couple of minutes, the water should start looking clearer at the bottom of the glass, then gradually clear all the way to the top.
Other reasons for cloudy water include hard water, too high water pressure, or colder-than-normal temperatures. In each of these occurrences, the water is potable. However, occasionally, there can be a significant accumulation of sediment or other issues that should be checked by a professional plumber to ensure the water is safe to drink. While most problems with tap water are easily spotted or tasted, a few require testing by a professional plumber to ensure the water’s safety.
If all the taps in your house are producing cloudy water, you can also ask your neighbors if they are having the same problem to see if it’s not just an isolated issue.
Top Reasons Why Your Tap Water Might Be Looking Cloudy
1. You May Have Hard Water
In many properties in the St. Paul and Minneapolis metro area, some degree of hard water is present. A higher amount of minerals, such as magnesium and calcium, builds up in the water supply, making the water look cloudy. A white coating, also known as limescale, may start to appear on fixtures and dishware, indicating the presence of hard water in your home.
St Paul Pipeworks plumbers recommend first using a hard water test kit to determine the actual level of hardness in your water supply. You can find a home test kit at most local hardware stores. To test, dip the paper strip in your water, and when the paper changes color, check it against the reference guide to see the level of hardness in your water. In most cases, hard water is perfectly safe to drink, though it may have a mineral taste. If you have any further concerns, you can consult a trusted plumber about options to install a home water softener.
2. Your Water Pressure May Be Higher Than Normal
A high level of water pressure in your home may be another reason your water appears cloudy. It takes a lot of pressure to move the water through the pipes in your home from the water plant to your faucets. Some common signs of higher-than-normal water pressure include running out of hot water faster than usual, toilets that are constantly running, and faucets dripping.
You can start by testing your water pressure with a water pressure gauge from the local hardware store. If you suspect a higher-than-normal pressure level, contact a professional plumber. The ideal water pressure in a home is between 40 and 60 PSI (pounds per square inch). St Paul Pipeworks plumbers recommend that if your water pressure exceeds 80 PSI, you should take action to resolve the problem. Typically, a plumber would install a water pressure regulator right after the pipe where the water meter enters the home to resolve the issue and restore the water pressure to a normal level.
3. The Weather May Be Too Cold
When temperatures are colder than normal outside, this can also make your water appear cloudy. This occurs because the solubility of air in water increases as temperature decreases, meaning the colder the water, the more air it contains. When it is very cold outside, as water enters your home and starts to warm up, some of the extra air no longer dissolved in the water is released. This will create tiny air bubbles, giving the water from the tap a cloudier appearance.
If this is the only problem you find with your home’s water, there is nothing that needs to be done or repaired. The water is the same as normal to drink, and it will return to clear when the weather outside gets warm again.
4. You May Have Sediment Build-Up
Cloudy water due to sediment build-up occurs only in hot water. If you notice that your tap water is cloudy when you turn on the hot water, it may be because there is a build-up of minerals and sediment inside your water heater. If, after a couple of minutes of pouring, the water becomes clearer at the top of the glass first and settles to the bottom, you probably have some type of build-up in your system.
First, you can try installing a sediment filter on the water heater to check for build-up from an outside source. If the build-up is coming from inside the water heater, you need a professional plumber to assess the situation. If the sediment and mineral build-up has become too severe, the plumber can either try to service the water heater or, in some cases, install a brand-new one.
If you start to notice a bit of cloudiness in your home’s water, or are just looking for a quality plumber in the St. Paul and Minneapolis metro area, do not hesitate to give St Paul Pipeworks a call today.
Yours Truly,
Matthew Dettwiler
Social Media Manager
FAQs About Cloudy Tap Water
Q: Is cloudy tap water safe to drink?
A: Yes—in most cases, cloudy or milky-looking tap water is perfectly safe to drink. The haziness usually comes from tiny air bubbles trapped in the water, which will naturally clear up after a minute or two. If the cloudiness doesn’t settle or if you notice an unusual taste or odor, contact a licensed plumber to rule out other issues.
Q: Why does only my hot water look cloudy?
A: If you notice the cloudiness only when running hot water, it’s likely caused by sediment or mineral buildup inside your water heater. Over time, minerals like calcium and magnesium can collect in the tank. Flushing the water heater or installing a sediment filter can help. If the problem persists, one of our St Paul Pipeworks plumbers can inspect it to make sure the system is running properly.
Q: Could high water pressure make my water cloudy?
A: Yes, it can. Excessive water pressure can introduce more air into your plumbing system, which may cause the water to look cloudy. High pressure can also strain your pipes and fixtures. If your faucets drip or your toilets run often, that may be a sign of a pressure issue. A plumber can easily test your water pressure and install a pressure regulator if needed.
Q: Does cold weather affect the clarity of my tap water?
A: It sure can. During Minnesota’s colder months, cold water holds more dissolved air. As it warms up in your home’s pipes, that air is released as tiny bubbles—making your water temporarily appear cloudy. This natural process is harmless and clears up quickly once the water sits for a bit.
Q: When should I call a plumber about cloudy water?
A: If your tap water stays cloudy for more than a few minutes, has a strong odor, or leaves a residue on fixtures or glassware, it’s a good idea to call in a professional. Cloudiness that doesn’t go away could signal a sediment problem, pipe corrosion, or another issue that needs attention. The team at St Paul Pipeworks can help you get to the bottom of it and ensure your water is clean and safe.
