07/11/2025
Dealing with hard water stains in your toilet? These left behind mineral deposits can make your toilet look incredibly dark and dingy and be even harder to get rid of the longer they sit. If you live in a home that sees hard water stains from time to time, you might be wondering how to get rid of them once and for all. Luckily, it's possible! All you need is a little routine maintenance and good scrub with easy-to-find (or make) cleaners.
What Are Hard Water Stains?
"Hard water is basically dissolved minerals in your water," says master plumber, Nathan Hudelson. The dissolved minerals found in hard water is typically a high concentration of calcium and magnesium. If your home's water supply mainly comes from groundwater, then you're more likely to have hard water with this high concentration.
So, now that you know what hard water is, how does it cause stains? "When these minerals are in contact with other surfaces or when the water evaporates, they are sometimes left behind," explains Hudleson. "On toilet and porcelain surfaces, it tends to make the surface less slick, leaving it prone to staining and even possibly clogging, depending on severity." And, unfortunately, the higher your water is in mineral concentration, the more stains you're likely to see.
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How To Remove Unsightly Hard Water Stains From A Toilet
Enjoy the brand-new toilet feeling again.
By Ashlyn Needham Published on April 25, 2025
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In This Article
What Are Hard Water Stains?
Essential Supplies for Removing Hard Water Stains
Methods For Removing Hard Water Stains
Preventive Measures
Additional Tips and Tricks
Cropped hand cleaning Toilet In bathroom
Credit: Getty Images
Dealing with hard water stains in your toilet? These left behind mineral deposits can make your toilet look incredibly dark and dingy and be even harder to get rid of the longer they sit. If you live in a home that sees hard water stains from time to time, you might be wondering how to get rid of them once and for all. Luckily, it's possible! All you need is a little routine maintenance and good scrub with easy-to-find (or make) cleaners.
Nathan Hudleson is a master plumber at Schlueter Plumbing.
What Are Hard Water Stains?
"Hard water is basically dissolved minerals in your water," says master plumber, Nathan Hudelson. The dissolved minerals found in hard water is typically a high concentration of calcium and magnesium. If your home's water supply mainly comes from groundwater, then you're more likely to have hard water with this high concentration.
So, now that you know what hard water is, how does it cause stains? "When these minerals are in contact with other surfaces or when the water evaporates, they are sometimes left behind," explains Hudleson. "On toilet and porcelain surfaces, it tends to make the surface less slick, leaving it prone to staining and even possibly clogging, depending on severity."
And, unfortunately, the higher your water is in mineral concentration, the more stains you're likely to see.
Essential Supplies for Removing Hard Water Stains
The good news is that, while challenging to tackle, hard water stains can be removed! There are several ways you can attempt to scrub off these stains at home without calling in a pro for a professional cleaning.
Here are the supples you'll need to say goodbye to those gross-looking stains:
Vinegar
Baking soda
Borax
Nylon bristle-brush or pumice stone (our favorite)
Methods For Removing Hard Water Stains
Try these tips for using homemade solutions or store-bought cleaners to completely remove hard water stains from your toilets.
DIY Cleaning Method
Making your own cleaner is a great option for times when you're in a pinch or just want something without the harsh chemicals. For this cleaning method, a combination of vinegar and baking soda is best because of the acidity and abrasiveness of the ingredients.
Here are the steps to follow with this method:
Pour one to two cups of white distilled vinegar into your toilet bowl.
Sprinkle about a cup of baking soda into the bowl and let it fizz.
Let the solution sit for a maximum of 20 minutes before scrubbing the bowl with a nylon brush or your toilet brush.
Flush several times to remove the cleaner.
If you're running low on these products, a mixture of hydrogen peroxide and lemon juice works just as well!
Using a Pumice Stone
Want a solution that doesn't involve several ingredients? Then you might benefit from using a pumice stone! These stones are abrasive volcanic rocks that are extremely effective at scrubbing away tough stains. The kicker is to make sure you don't scrub too hard so it doesn't damage the bowl.
Here's how to use a pumice stone for tackling hard water stains:
Start by soaking the rock in water to soften it up.
Wet the stains in the toilet bowl by flushing.
Gently scrub the bowl with the pumice stone, working in circular motions.
Wipe the stained areas away with a microfiber cloth before flushing to remove left-behind particles.
Using Commercial Cleaners
While homemade cleaners can be used, commercial cleaners are just as effective for removing hard water stains from your toilets. The key is to choose a product that's safe for your septic system while being specifically designed to tackle hard water stains. Cleaners like Zep or CLR are the best to use.
Most store-bought cleaners have the same application process, but it's important to read your product's label to follow directions. Commercial cleaners usually ask you to apply the product around the rim of the toilet, like you would normal toilet cleaners, before letting it sit for a few minutes.
Then, using a scrubbing tool like your toilet brush or a nylon bristle brush, work the product into the bowl to remove the stains. Finally, you flush away the cleaner and see a sparkling clean toilet bowl.
Since commercial cleaners can be made with lots of chemicals, it's best to keep these tips in mind for safe handling:
Keep the room well-ventilated.
Wear gloves.
Never mix with other cleaners or chemical products.
Keep away from children or pets.
Preventive Measures
To keep your toilet bowl as free as possible from hard water stains, it's best to stick to a regular cleaning schedule. Cleaning your toilet bowl once a week keeps the bowl sanitized and quickly removes any build up before it turns into an unsightly mess.
