You can’t see the main sewer line that carries waste away from your home, but it is obviously very important. You should pay close attention to the warning signs of a clogged sewer and call a plumber immediately if you sense danger. It’s not always easy to diagnose a clogged sewer in Jacksonville, but there are several things that you should look and listen out for in your home. Here is how you can tell your sewer line might be clogged. 
Your toilets clog for no reason.
If your toilets clog every now and then and there’s a good reason for it, there is probably nothing to be alarmed about. However, if your toilets clog regularly and they clog without a reason—for example, trying to flush too much toilet paper down them—you could have a serious problem with your sewer line. A plumber should investigate the issue further.
Your toilets make strange sounds, even when you’re not using them.
This is one of the first signs of a problem with a sewer line. Because all of your waste water can’t leave your home through the line at once, it will back up and your home’s toilets will make gurgling sounds as the water inside of them percolates. This can happen when you use a sink, a shower, or even a washing machine.
Your basement’s drains have water pooling around them.
The drains in your basement are supposed to carry water away, not fill your basement up. When you have a clogged sewer line, though, water can come up through your drains and cause pooling to take place around them. You should always be concerned whenever water is coming up a drain instead of going down it.
Your home smells like sewage.
In a worst case scenario, raw sewage can get so backed up that it ends up coming up through the drains in your home. It will smell bad and serve as a strong sign that it’s time to call the plumber and have him take a look at the situation.