I live in Warsaw and my hot water is brown!!!

The thing I always loved (I use this ironically) about London was what came out of your nose at the end of the day. Black!! People often complain to me that Warsaw is dirty and yes while some buildings could use a lick of paint or sandblasting it's virtually spotless compaired to London.

My hot water is sometimes brown but you just have to let the taps run to let it filter itself out. It usually coincides with some tampering of the pipes that workmen do.