If you find that your water well smells like rotten eggs or sulphur, you can follow some simple steps in order to fix it.

First, you will need to check for cold and hot water smells. What to do next will determine whether your water smells when it is hot or if the smell is also coming from cold water. Run a hose or tap as close to your well as possible and fill up a five-gallon bucket or other container and try to notice any odours. If you smell a rotten egg odour, this is hydrogen sulphide gas. If your water smells like oil or asphalt, then this could be caused by manganese in the water. If your water smells like cucumber or sewage, this is typically the result of iron or sulphur bacteria or both.

Run your hot water from each tap and try to notice an odour in hot water that is not there in cold water. If there is only an odour in hot water, this indicates an issue that has to do with the water heater. In water, sulphate and iron and sulphur bacteria interact with the anode rod in water heaters. This creates hydrogen sulphide gas, creating the rotten egg smell in the water. Switching out the anode rod to an aluminum rod will usually solve this issue. If this is not an option for you, you can also search for a water heater odour killer filter screen. This can also help get rid of the sulphur smell in your water. This device can make it easy to periodically add some store-bought hydrogen peroxide to your water heater, which instantly kills the odour and is safe to use.

If you have an odour issue with the water supply, you will first need to determine the source. If your water source is a public water system and you have issues with smells in the cold water, you will need to contact your water utility or contact professionals for help. If your source is from a well, a general mineral water analysis is crucial to picking the right system to treat the issue at hand. Your test should include analysis for pH, iron, manganese, hardness, total dissolved solids at a minimum. Other tests for sulphate, hydrogen sulphide and tannin are also recommended. Take the sample as close to the well as possible. With the results, you can then identify the best type of water treatment to use and what type of system to choose based on the chemistry of your water.

Your well water will need to be tested for total coliform and e-Coli (fecal coliform) for any health- related issues. If there will be infants and children drinking the water, using a general mineral, metals and the bacteriological test is also recommended.