Why is the bottom of my toilet blue?

Author: Javier Koss Sr.  |  Last update: Wednesday, July 2, 2025

If your toilet has blue-green stains, it's probably because of copper. Even if you don't have copper pipes, it could be in your water supply as a trace element from groundwater.

Why is the bottom of my toilet turning blue?

most cases, the blue color is due to a change in the way the water is treated. Some municipalities add extra chlorine to the water supply during hot weather or when there is a risk of contamination. This can cause the water to turn blue when it mixes with the chemicals in your toilet bowl.

How do I get the blue out of my toilet?

Are there any DIY remedies for removing blue stains on a toilet seat? Use steel wool pads, scrub gloves and Palmolive dish detergent. Spray your toilet down with Lysol and let it set for 10 min. Spray it down with 70 percent rubbing alcohol. Put a 1/2 cup of bleach in your toilet and flush before you add bleach.

Can I use the toilet if the water is blue?

YSK: You shouldn't put blue loo/blue water in your toilet. Why YSK: blue water corrodes the seal on the pipes over time and can lead to more frequent leaks, among other problems. Archived post. New comments cannot be posted and votes cannot be cast.

Why is my toilet water blue all of a sudden?

most cases, the blue color is due to a change in the way the water is treated. Some municipalities add extra chlorine to the water supply during hot weather or when there is a risk of contamination. This can cause the water to turn blue when it mixes with the chemicals in your toilet bowl.

How to Fix My Sweaty Toilet - 3 Ways to Fix It Now!

Why is my toilet seat blue all of a sudden?

Pseudochromhidrosis. It's rare, but some people have a condition called chromhidrosis that causes their sweat to turn different colors, including blue. But if you have chromhidrosis, you're usually staining your clothes and your bedding too, not just your toilet seat. And you don't have to be pregnant.

How to fix blue water?

If you think you have copper contamination, you may need to have a professional repipe your home, or at the very minimum, repipe whatever section of piping has corroded. Contact a plumber to inspect your piping and check for corrosion. Your plumber will offer repiping costs if it turns out your pipes are corroded.

Is blue toilet water bad for septic?

While they may seem like the perfect way to clean and sanitize your toilet, the reality is that they're quite harmful to it. Those blue toilet tablets can cause corrosion to parts inside the tank and contain harmful chemicals that may be released into your home and the environment.

What is toilet blue?

The in-cistern toilet blue that cleans, deodorises and disinfects. Long lasting commercial grade sanitiser. Pleasant reodoriser (perfume) which adds a fragrance to each flush. Measured dose with each flush gives a blue colour to the water.

Why is my bathroom turning blue?

In most cases, blue/green tinted stains are caused by the water flowing through your pipes having a low (acidic) pH. Chances are your water pipes are made of copper and the blue discoloration is the result of the insides of the pipes being attacked by the aggressive low pH water.

What is the stuff that makes your toilet blue?

One of the most common causes of blue toilet water is the use of blue cleaning tablets. These tablets are dropped into the toilet tank, slowly dissolving and turning the water blue. While they can make your toilet bowl look cleaner, they have chemicals that can damage the rubber and plastic components of your toilet.

How do you get blue limescale out of a toilet?

Pour undiluted white vinegar into your toilet bowl, making sure you get it up under the rim where limescale often gathers and cover every part of the surface. Leave it for three to four hours and then scrub it with a brush. Repeat if necessary.

Why does my toilet start running out of the blue?

A running toilet may stem from issues like a tangled flapper chain, incorrect float settings, fill valve problems, or a worn-out flapper. Troubleshoot these common causes before considering professional assistance for a quick and cost-effective resolution.

How do I get rid of blue water in my toilet?

Borax is another great option for tackling these blue stains. Sprinkle about a quarter to half cup of Borax around the inside of your toilet bowl, making sure to cover all the stained spots. For regular stains, let it sit for around 20 minutes.

Is blue toilet cleaner bad?

You may love the blue water it makes in your toilet bowl, but these tablets often contain chemicals that wear out working parts inside the tank,” the plumber explained. “Plus, as these tablets disintegrate, they can get stuck in the flush valve and prevent the toilet from flushing."

What causes blue water stains in toilet?

Blue stains often occur in areas where the water is highly acidic and contains elevated levels of copper. Unfortunately, cleaning the toilet bowl once won't stop the stains from coming back since the water keeps flowing.

Why some toilet water is blue?

Blue (or blue-green) water may be due to extreme copper plumbing corrosion. If this is happening, the water will usually have a bluish-green tint and/or will leave a bluish-green stain around fixtures and on a white surface if the water drips from a faucet.

What is toilet bluing?

Toilet bluing is the act of placing a blue dye in a toilet bowl to color the water, and is mandatory per most employer and government drug collection standards.

What toilet bleach is blue?

Domestos Toilet Bleach Blue 750ml Pack of 3 - 481001.

What is the color of septic sewage?

Colour: Fresh sewage is light brownish-grey color. The old sewage is converted to black or dark brown due to anaerobic activities, known as stale or septic color.

What causes blue line in toilet bowl?

Blue or green stains

This signifies copper stains which can be caused by copper pipe corrosion or by a high amount of copper in your water.

What do plumbers recommend to clean a toilet tank?

Cleaning your toilet tank is a very quick and easy procedure. We recommend using a mixture of ¼ cup of vinegar for every 1 cup of water. This ensures your toilet tank is being disinfected without causing damage, which the use of bleach or chemical cleaners can do.

What causes the water to look blue?

The ocean is blue because water absorbs colors in the red part of the light spectrum. Like a filter, this leaves behind colors in the blue part of the light spectrum for us to see. The ocean may also take on green, red, or other hues as light bounces off of floating sediments and particles in the water.

What happens if your water is blue?

On rare occasions, a blue colouration to the water may also be caused by corrosion of copper plumbing. The blue colour indicates that there are quite high levels of copper in the water. The problem normally only occurs where there is relatively new copper plumbing. The blue colour will disappear when the tap is run.

Why does my well water look blue?

When homeowners discover their home drinking water has a slight blue tint, it's a cause for concern. Blue or blue-green water likely means it contains copper. When water stands in copper pipes, the copper sometimes dissolves, which causes a blue tint when it reacts with the water.

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