# FAQ overflow

#### QUESTION

OK, I actually know how to remove chlorine, but I'd like to have the pros and cons of each method spelled out. I will post an answer and mark it as a community wiki. Please edit it with your input.

There are several ways that you can remove chlorination from your tap water before you brew with it. This topic should help you to choose which one is right for you.

###### Off-gassing

If you water contains only chlorine and not chloramine, you can let it sit for 24 hours and the chlorine will dissipate into the environment.

Pros:

• Free

Cons:

• Takes a long time
• Will not remove chloramine
###### Boiling

If you water contains only chlorine and not chloramine, you can drive the chlorine off by boiling the water for 15 minutes.

Pros:

• Faster than waiting for it to off-gas at room temperature

Cons:

• Requires a lot of energy and significant time to boil all of your water before you even start brewing.
• Will not remove chloramine
###### Filtration

A charcoal filter is designed to strip your tap water of chlorine and chloramine, block carbon filters are necessary for effective removal.

Pros:

• Fast, nearly as fast as your free-running tap
• Removes both chlorine and chloramine

Cons:

• Filters last roughly 2-6 months depending on water usage and cost between $5 and$30+ dollars to replace depending on the system.
• Some charcoal filters need to have water running through them for about 5-10 minutes before being used when replaced. This clears out any charcoal dust that may have been generated during shipment.