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Water infrastructure is very expensive and the industry is dealing with more problems than ever before (impacts of climate change, PFAS, aging infrastructure). Lots of money and effort is needed to fix these problems, but it is worth remembering that tap water is safe for the overwhelming majority of consumers in developed countries. It is worth knowing more about your drinking water, but don't assume that your water is dangerous because of headlines like this.
Feel free to ask any specific questions you might have about your water!
Sometimes I get like a blue residue on my drinking glasses. I think it might be copper? Not sure what to do about it. NYC.
Maybe do one of those free water tests where you send them a sample
Weak acids like vinnegar tend to dissolve mineral deposits.
That's certainly unusual. Does this occur after having water sit, or is it after cleaning them? You should call your water provider to report it and ask for their advice. If it isn't something your neighbours are dealing with then it's probably (a) something to do with your dish soap, or (b) the plumbing in your home. Regardless, that's not normal and you should call your water provider.
Do you know of a good home remedy for water filtration? I have a brita but I figured there was something a little less wasteful than buying new filters every few months.
There are two approaches here. First, if you have a well, you can get a pressure filter system installed. Different systems achieve different things, such as reducing the hardness or removing iron and manganese or sulfur.
Second, if you have municipal water, you could get a tap filter. This type of filter goes directly on your tap and is used to remove particles. Usually these are overkill, but they use them in areas with lead pipes to reduce lead exposure (they will remove the pipes eventually, but it will probably take a decade or more in some cities). Your classic pour over Britta doesn't do anything for particles, instead it adsorbs certain dissolved contaminates and removes residual chlorine. This may make your water taste better, but it won't protect you from lead if you have lead pipes.
Unfortunately there really isn't a replacement for these types of adsorptive filters because they work using activated carbon. Activated carbon comes from natural products (primarily coal, but also coconut shell and other materials), but it has to undergo a heating process to "activate" it, which goes well beyond what you can do at home. That said, other than the improved taste there is likely no benefit to using it, and you can dechlorinate your water by simply leaving a jug in the fridge for a few hours.
If you are on a well I can explain some of the other options!
Let's hear about the well options, please 🙂
Groundwater does not typically contain many particles because (a) water moving through the ground gets naturally filtered and (b) groundwater is typically anoxic, which causes certain things to dissolve. Accordingly, most filtration systems for well waters are focused on removing those dissolved contaminants.
The most common well water treatment is water softening. These systems remove hardness from your water (cations, typically calcium and magnesium). Water softeners are usually ion exchange based, so basically you are swapping out the calcium or magnesium for sodium or potassium.
Some wells have dissolved metals (manganese or iron are common) that can stain fixtures and laundry (manganese can also cause health problems for children). Arsenic is also common in some regions, which causes cancer, and hydrogen sulfide, which causes a rotten egg smell. All of these can be removed using a special filter system, which uses catalytic oxidation to oxidize and remove these contaminants. These systems typically use manganese oxide (often called greensand) and chlorine.
To remove salts or microbial contaminants it is common to use a reverse osmosis (RO) membrane filtration system. These systems reject salt ions and microorganisms by a combination of small pore sizes and charged surfaces - the salt ions can't pass through a positively charged surface because of electromagnetic repulsion.
If you have well water you should get it tested regularly and make sure your treatment system is appropriate for your water!