Ask around. Ask your friends, ask your neighbors and get referrals. Nothing is more powerful than the testament of someone who has had a local plumber in their home and can speak to his/her capabilities.
He continues to review the scene of destruction, occasionally muttering "Hmmm" under his breath. Somehow, I intuitively know that every "hmmm" is costing me an additional fifty dollars.
Your third option is a regular garden hose. Bring the hose in through a door or window (have it turned off, of course), put it down the pipe as far as it will go, add towels and rags around the drain to keep water from backing up, and then get a partner to turn it on and off in short spurts. The pressure from the water might work bathtub to loosen the clog.
Trustworthy. The best way to find a Trustworthy plumber is to ask a close friend, family, or a good neighbour for recommendations. They're the best people to ask because they've experienced the services first-hand and they will never lie to you about it. This works in the same way they won't let you hire someone who has worked for them and delivered bad service.
The number one thing to look for is emergency services. You never know when a pipe will burst or a toilet will overflow. It is not always during business hours, and you certainly cannot wait hours until a Local plumber is ready to come to your home in the morning. You need someone who will be responsive when you need fast help, which is why you should look for a company that provides emergency hours. You may have to pay an extra fee, but it is usually cheaper than having to pay for mold elimination down the road after letting standing water stay in your house for days.
Here's an example. Let's say you are a plumber. Will people put "plumber" into Google to try to find you? How about "plumbers"? How about "plumbing"? All of these are valid search terms, but they each reflect a different "conversation" in the mind of the searcher.
Even if you have not noticed a problem with your sewer lines, consider calling in a plumber for an inspection. If there is a problem, set up an appointment to have it repaired right away. Remember that replacement can be costly but you can save money by going with a company that will avoid trenching the yard.