If you have money for that size of system that is fully automated, just get a nice RO system. It will solve everything even if your water changes threw out the year.
This was my thought initially, but...
My water around here is pretty crummy and it does taste worse after just sitting overnight. Its a plastic bandaid taste mixed with chlorine.. I dont see it being oxidation since I CIP everytime with PBW then rinse.
I dont have any problems getting a trash can and a RO if it solves the ****ty taste.
Here is my set up :
https://www.homebrewtalk.com/f51/my-insane-25-gal-100-percent-hard-plumbed-tri-clover-automated-tippy-build-409516/
If your tap water tastes like plastic/Band-Aid it could be because your home water is pumped through plastic pipes.
Water plants generally make an effort to remove as much chlorine and/or ammonia (chlorine + ammonia = monochloramines + dichloramines + trichloramines) at the plant before it leaves. Di- and tri-chloramines will "remove themselves" from the water as the water makes its way to your house. The remaining monochloramine and/or chlorine can be removed with campden tablets. Some claim that camden tablets do not work but you have to keep in mind that you need to add X amount, not just drop one or two in. There are formulas out there to help you determine the amount of tablets you will need.
There is some controversy around this (as with too many topics in home brewing); that boiling the water for up to 2 hours removes chloramines (it does, however, remove chlorine). There are people who write for reputable homebrew websites that claim to have done the experimentation and that it works.
The CIP technique would be great for killing bacteria but there is a reason why Lysol claims to "only" kill 99.9% of bacteria: there is a difference between sanitation and sterilization. Unless you are pumping some serious steam or heat through your system there could be a nook or two harboring bacteria that you are not reaching. This is probably not your problem and is more of an FYI.
Since you claim that standing water over night also produces off-tastes (plastic, Band-Aid) I think it is safe to say that it is not oxidation in your system.
However, before you go all-out and install an RO system, you should do some experimentation with smaller batches first to rule out a thing or two. Since you already know what straight tap water tastes like with your system you can do one small batch with the campden tablets and another batch with store-bought RO water. Another thing to try is a longer boil.
As for RO systems, there are two basic types you can purchase: one designed specifically for home use and one designed for aquariums. Home systems will generally have a carbon pre-filter and may or may not have a second carbon filter placed "after" the membranes. These are designed to produce "pure" drinking water and have nearly all dissolved solids removed. If you go this route you most surely will need to build your own water based on the typical water profile for the style of beer.
RO systems designed for aquarium use have varying membrane systems that remove, if I remember correctly, from the low 80% to 99% of dissolved solids. Keep in mind that fish, like all living organisms, require minerals to survive, is why aquarium RO systems have a lessing, or increasing, level of filtration. They all should remove chlorine, though, but as an FYI this probably why some home brewers who use RO system purchased from an aquarium shop claim to not build water and still produce great beers and why others claim that you have to build water if using an RO system.
To my knowledge, most commercial breweries use carbon filters to filter out chlorine/chloramines. This might be a cheaper investment for you than an all-out RO system. You can get an inline charcoal filter instead.
This water-quality report, if I am reading it correctly, seems to be testing the water at the source (of one out of the four aquifers your city uses) and not of the quality of water after it leaves the plant. Even if it were tested at the plant the water coming out of the tap in your home will still be different depending on the distance you are from the plant, the number of water mains the water passes through on the way to your home, and the types of piping used (more than likely a combination of concrete and plastic unless you city is old enough to have a metal-piping system). In other words; the water coming out of your tap is not the same as the water at-the-source.
You can purchase home chloride test kits, chloramine test kits, and even chloride test kits. You can also use a swimming pool test kit to measure chlorine.
The Ward Labs test does not do chlorine or chloramine, just chloride. Chloride is an ion of chlorine, but they are not the same species as the extra electron causes the chloride to behave differently and chloride is essential to life whereas chlorine is not. Also, chlorine as we know it (swimming pools, bleach, etc.) is two chlorine molecules bonded together whereas chloride is a singular molecule.
I remember seeing that thread before. Beautiful. Put some good water in that thing
