Why Does My Water Smell Like Rotten Eggs?
- Jul 10
- 3 min read
If you've turned on your tap and noticed a strong rotten egg smell coming from your water, you're not alone. It's one of the most common concerns we hear from homeowners with private well water.
The good news is that while the smell is unpleasant, it's often treatable once the source has been identified.
What Causes the Rotten Egg Smell?
A rotten egg odour is usually caused by hydrogen sulphide gas (H₂S) in the water. Even very small amounts can create a noticeable smell and unpleasant taste.
Hydrogen sulphide can occur naturally in groundwater as it passes through certain rock formations. It can also develop when naturally occurring sulphur bacteria are present in a well or plumbing system.
In some cases, the smell may only occur when using hot water, which could indicate that the water heater is contributing to the problem rather than the well itself.
Why Does My Well Water Smell Like Rotten Eggs?
There are several possible causes, including:
Naturally occurring hydrogen sulphide in the groundwater
Sulphur bacteria inside the well or plumbing system
A water heater that is producing hydrogen sulphide
Organic material breaking down underground
Because the cause can vary from one property to another, it's important to determine where the smell is coming from before choosing a treatment solution.
Is Water That Smells Like Sulphur Safe?
A sulphur smell doesn't automatically mean your water is unsafe to drink, but it shouldn't be ignored.
Hydrogen sulphide can:
Make drinking water unpleasant
Leave a bad taste in coffee, tea, and ice
Cause unpleasant odours throughout the home
Contribute to staining or corrosion in some plumbing systems
Make bathing and washing less enjoyable
If the smell appears suddenly or changes significantly, it's also a good idea to have your water tested to rule out other water quality concerns.
How Do You Get Rid of Rotten Egg Smells in Water?
The best solution depends on what's causing the problem.
If hydrogen sulphide is naturally present in your well water, a properly sized iron and sulphur filtration system is often the most effective long-term solution. These systems are designed to reduce hydrogen sulphide while also treating common well water issues such as iron, manganese, metallic tastes, and staining.
If the smell is only coming from the hot water, the water heater may need to be inspected before installing additional treatment equipment.
Every water supply is different, which is why testing the water first is always recommended.
Can a Whole House Filter Remove Sulphur Smells?
Some whole house filtration systems can help reduce certain tastes and odours, but not every filter is designed to remove hydrogen sulphide.
For well water with a strong rotten egg smell, a filtration system specifically designed for hydrogen sulphide and iron removal usually provides the best results.
Choosing the right equipment depends on the concentration of hydrogen sulphide and the overall chemistry of your water.
When Should You Have Your Water Tested?
If you've recently noticed your well water smells like rotten eggs, consider having your water tested if:
The smell has become stronger over time.
The odour suddenly appeared.
Your water has a me
tallic taste.
You notice orange, brown, or black staining.
You haven't had your well water tested recently.
Testing helps identify the cause of the problem so the correct treatment can be recommended.
Burlington Water Tech Can Help
At Burlington Water Tech, we've been helping homeowners solve well water problems since 2003. If your water smells like rotten eggs, we can assess your water and recommend a treatment solution that's appropriate for your home.
Whether the answer is an iron and sulphur filter, a whole house filtration system, or another water treatment option, we'll help you find a solution that works.
If you're dealing with rotten egg smells, unpleasant well water odours, or other water quality concerns, contact Burlington Water Tech to learn more about filtration solutions for your home.
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