Rotten Egg Smell?
Does your water smell or taste like rotten eggs?
You are actually smelling Hydrogen Sulphide Gas (H2S).
Apart from that special smell/taste, it is very corrosive to piping and turns water black.
It doesn't require a high concentration to be noticed - the level can be as low as 0.05mg/L.
Where does the H2S come from?
Occurs naturally in the water Due to presence of sulphate-reducing bacteria in the well.
Ponds or Dugouts
Probably it will be most noticeable in Winter and Spring.
It is a by-product of decomposing vegetation, weeds and algae and is caused by the lack of dissolved oxygen in the water.
To solve: Combine aeration of pond with a good, consistent maintenance program.
If you only smell the odor when hot water is running, there may be a biochemical reaction occurring in the hot water heater between: sulphates in the water; sulphate-reducing bacteria a magnesium rod in the hot water or organic matter in the water.
To solve: To reduce sulphate-reducing bacteria: disinfect the water heater with chlorine bleach or hydrogen peroxide. Where the reaction with the magnesium rod causes the odor problem, replace with a zinc rod. These rods are placed in the water to reduce premature corrosion of the tank. (aka: 'sacrificial' rods)
Water treatment system options:
Chlorination and sand filter
Install a chlorine feeder and a sand filter. H2S is oxidized by the chlorine. The sand or crushed anthracite filter traps any insoluble sulphide particles.
It requires about 2 mg/L chlorine to remove 1 mg/L H2S.
Bonus: This system will also remove iron if present.
One last step before you drink the water .........Purify It
Simply install a point-of-use water purifier featuring: Carbon block filter to remove chlorine taste and odor Multi-web filter down to 2 Microns to trap particles and bad-stuff like cysts, Ecoli etc.... UV light to neutralize harmful bacteria molecules.
There are models available that are about the size of a blender that can sit on the counter, or be placed under the counter. Typically, 5,000 L can be processed before requiring a replacement filter or annually.
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