What Causes Hard Water Stains?

March 5, 2016

Have you ever noticed a white, chalky buildup on your faucets? Do your toilets have a blue ring around the water’s edge? Do you see an orange rusty looking stain in your sink or tub? These are all hard water stains.

What causes hard water stains?

Water is colorless, but it can leave behind some traces of itself. What you are seeing are the effects of hard water. Hard water stains are present because hard water contains extra minerals that are not needed and often undesirable. While the majority of the water goes down the drain, the additional minerals such as calcium, magnesium and iron may linger, leaving white, orange or blue deposits on bathroom and kitchen fixtures. Those minerals are also responsible for making your drinking glasses look cloudy and causing mineral buildup in pipes.

How to get rid of hard water stains

There are many cleaning products on the market that will help remove the stains caused by hard water. They are typically very strong, may contain acids and must be used with gloves in a well-ventilated area. They are usually very effective. Once you are finished removing the stains, however, the goal is to keep them from returning.

Consider soft water

Turning your hard water into soft water may be the answer to ridding your home of all those irritating water stains. Installing a water softener will remove unwanted minerals from your water. Not only will it take care of the stain problem, but it will also help keep your pipes clear and give appliances a longer life.

Who to call

Kinetico San Antonio offers free water testing to diagnose your problem. We are experienced professionals who can provide you with the best water softening solution.

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Kinetico Water Softeners are rated 4.9 out of 5 from 628 reviews.

Jonathan Myers

We're very glad we got this installed. The technician, Alberto, was very polite and thoroughly explained what he was doing and what we would need to do.

Kyle James

Alberto kept me informed on his arrival time. He was professional and exceeded my expectations concerning the install of the water filtration system. I also need to put a plug in for Tracy for her patience and skills at making things happen behind the scenes...a true unsung hero. They both deserve a raise!


I just had my system installed by Alberto and Jay, and I wanted to say that they rocked. Got it all in and gave me some instructions to follow, all while being determined to detail and professional. Thanks, fellas.