If you have a direct question for a lawyer, we can refer it to them. If the harm or annoyance is suffered by one or a particular group of people, it is a private nuisance. Hence, a public nuisance is really just a multiplication of private nuisances. Most cases of private nuisance involve land.
Some common examples are the malfunctioning of sewage systems, highway noise or vibration.
A court would assess the reasonableness of any nuisance based on what would be tolerated by the ordinary occupier. The standard is the ordinary man, which means that abnormal sensitivities may prevent a claim if the nuisance would not have otherwise unreasonably interfered with an ordinary occupier. The court will weigh the inconvenience to the plaintiff against the usefulness of the defendant's conduct under the circumstances. The interference must be substantial. For example, the building of a hospital next to a person's land was held not to be a nuisance.