I am not an expert with water filtration or cisterns, if there is a professional in your area that is familiar with them it may pay to have them come out and see your setup, have the water tested and see if a whole house filtration system makes sense.

How old is your cistern and has it been cleaned/disinfected lately?

Maybe this resource will help(page 2): http://www.ca.uky.edu/enri/pubs/enri205.pdf

or this:
http://www.gallatin.mt.gov/Public_Documents/GallatinCoMT_WQDFactSheets/Drinking%20Water%20Storage%20Cisterns.pdf

Possibly consider if you haven’t already done so having your water tested. I realize it is trucked in from the city but there could be numerous issues, the cistern might need cleaned, what about the vehicle hauling the water out to your place, possible it’s holding tanks have bacteria or mold.

Hopefully some of this helps, overall this is something you should get together with a couple professionals who have experience with cisterns, filtration systems etc…

I have lived in several different places in my city and we bought a place in the country and built a new home. My wife and I did not want a well so we put in a cistern and we have city water delivered to us. My wife is a clean freak and inside our toilet tank we started to see like a black slimy substance and inside our toilet bowl, shower stalls, and dog dish we are seeing a pink slimy substance. We clean it with bleach, but it keeps coming back. We also noticed that the waterflow out of our bathroom faucets was not right, so I took the spout part apart and noticed that the screen part was clogged up wth black slimy substance. What can I do to take care of this problem? Is there some type of filter we can put on this system or add something to they cistern to eliminate this problem we have?

This is likely a white water mold (even though it appears to be pink when looking at it). The best way to get rid of it and keep it from coming back is to clean everything with a bleach solution. You have to really clean everything and keep up the cleaning at frequent intervals to keep it from coming back.

Correlations have been found between this type of mold and causing human infections, for example urinary tract infections, wound infections, and gastrointestinal system problems, but it affects different people differently.

If you or your family are experiencing any health related issues that are ongoing and the believed presence of mold I would contact your doctor for further suggestions.

I do have a ventilator (no window) which i run while in the shower, and for at least a half hour after.

I have also cleaned my bathroom with disinfectants and bleach, but the problem returns. That’s why i asked if the mold could be inside my faucets, where i can’t clean it away.

Oh well, I can’t really afford to replace all the fixtures, so i’ll look into buying a dehumidifier and i’ll keep up the cleaning i’m doing now.

Also, i asked about how the mold is “involved in different infections” – You wrote that the mold is often found in hospitals, so i’m wondering if the mold is a resault or a cause of infections…

Sorry to hear about your mold problem. Are you sure it is pink mold coming from your faucet is it possible it is some type of mineral buildup? The first steps I would take is clean your bathroom floor to ceiling. Areas where their are tile or surfaces that will not be ruined clean with a bleach based cleaner.

Does your bathroom have a fan in it that draws moisture/warm air out? If it does I would run it while you are showering and leave it run for a half hour after the shower. This will help remove moisture and the warm humid air from your bathroom. If you do not have a fan and have a window open it a crack to help let the warm moist air out.

Pink mold really isn’t that harmful from a medical standpoint(when compared to black mold) from what I have read(I am not a doctor) and the best way to rid your bathroom of it is do the above and just keep up on it from a cleaning standpoint.