Water pressure issues

Hey!
First of all, I am not a plumber and have very little idea about plumbing and the related areas. My house is located in Toronto. The water pressure in our household is really low. I tried contacting a lot of plumbers but none are responding. Any suggestions?

You will be better of with answers from your area. But here is a start.  If you can, get a pressure guage for an accurate reading of what your pressure is. Less than 30 pounds becomes suspect ...the exact number has to do with your area regulations.  If the pressure is too low there may be health concerns.  Here there are two places Water pressure may be able to be tweaked.. at the meter and at a pressure regulator as the pipe enters the house. Exact locations of both can vary. If you do increase your water pressure ...be sure to check for leaks.  The pressure may have been set low for a reason.  Or, the higher pressure may stress the pipes more. If those don’t work, you may have more serious plumbing issues.  

A key question is if this came on gradually or if has always been a problem?  Is the pressure low at all faucets?

Do unscrew the screen off your kitchen faucet.  Are there white deposits?.  If so, clean things out the best you can. I have had this work and head off major plumbing, but it may be an indicator of more serious problems.

If your pipes are blocked from old age, it happens with galvanised pipes, your pressure will be reduced.
The pipe maybe crushed or simply not big enough.
Are you talking about pressure or flow volume?

Toronto is a fairly hard water area, so pipes can get gummed up with calcium deposits. You may be able to ask your water supplier to check the pressure water is being delivered to your property at. If they says it's fine but you're getting a lot less coming out at all your taps, then if could be there's an issue with the supply as it comes into your property. If it's only some taps, then they could be blocked and you may be able to descale them. If it's only affecting hot water, then the hot water system pipes could be blocked. A friend of mine in your part of Canada is constantly having issues with her on-demand hot water system because of this - the cold water runs fine, hot just dribbles. Other thoughts - if there's a whole house water softerner or filter, that could be blocked. Some flow waaaaaaay slower when the filter needs changing.