The phrase "nationwide concern" is correct and usable in written English.
You can use it when referring to an issue that is seen as important across the whole country. For example: "The rising unemployment rate is a nationwide concern that needs to be addressed urgently."
The incident sparked nationwide concern for the safety of the country's infrastructure.
While binge drinking is a nationwide concern at colleges, the parent-notification policy faces an almost unique set of obstacles here at the University of Wisconsin.
While an urgent review of the treatment of young persons in custody in Northern Territory is required, these fundamental questions are a nationwide concern.
And with nationwide concern about rising levels of obesity in children – who are now all weighed in primary school – they must be careful what those children are told.
Parents interviewed on Tuesday seemed comfortable with the way the principal had addressed the issue of bullying and hazing in general, which has become a nationwide concern in the wake of several teenage suicides.
The grotesque nature of the murders, coming in the midst of a nationwide concern about satanic cult activity, especially among teenagers, led investigators from the West Memphis Police Department to focus on Mr. Echols, a troubled yet gifted 18-year-old who wore all black, listened to heavy metal music and considered himself a Wiccan.
"But in this situation, the question is: which is the least worst?" Trump's claims in recent weeks of a "rigged election" had left people nationwide concerned that his supporters would attempt to intimidate voters at polling stations.
Still, the blazes occurred in the 10 days after a gunman killed nine parishioners at the historic Emanuel African Methodist Episcopal Church in Charleston, South Carolina -- and their proximity to that tragic event raised nationwide concerns for black churches and the black community.
Over the past decade harmful algal blooms (HABs) have become a nationwide environmental concern.
A number of nationwide commercial concerns have their head offices in Cape Town, including oil and insurance companies.
Though "The Girl Next Door," a naughty new comedy that opens nationwide today, concerns the behavior of porn stars, it is unlikely to be mistaken for a pornographic movie.
