COLUMBUS, Neb. (AP) — Platte County officials want to know the source of a strange smell at the courthouse and whether it’s dangerous.

The Board of Supervisors has approved an air quality assessment by environmental firm Cardno ATC. The test will cost up to $2,000 and its date hasn’t been set.

County officials say visitors and employees to the treasurer’s and sheriff’s offices have complained of the unspecified odor and humidity over the past few months. Those offices are adjacent to each other in the courthouse.

Supervisor Tom Martens says the inside air quality will be compared to the outside and to various federal guidelines. He says the testing should determine if the air poses any health risks.