Poweshiek County

Residential Dust Control

When you spread LIQUIDOW™ Liquid Calcium Chloride on unpaved roads, a lot of problems clear up.

*LIQUIDDOW™ – Trademark of Occidental Chemical Corporation.

Dust control is not dust elimination.
Calcium Chloride attracts moisture, and this is what makes it an excellent dust control product. LIQUIDOW™ is produced from natural brine deposits found underground, so it is safe for the environment.

Due to weather, road, and traffic conditions, two applications are recommended. A minimum length of 300 feet is REQUIRED.


Application will begin sometime after May 13, 2024, weather permitting.

All applicants MUST have are to be treated flagged and visible with (4 flags) for the entire season (May to October). Flags are available for you to pick up at the Montezuma, Grinnell, or Brooklyn County shop. Each applicant is responsible for putting the flags up shortly after the deadline date.

Please have area to be treated clearly flagged and visible at each end for the ENTIRE season (May to October). If flags are not visible, drivers will use their own judgment for location. PLEASE NOTE: All spots will be measured. Any footage flagged over the amount ordered will be billed to the customer. If you are unsure of flag distance and do not want more than ordered, please indicate that on the application.


Poweshiek County allows the placement of dust control on rock roads. The interest of motorists to have a well-maintained road takes priority over the interest in suppressing dust. Dust control sections will be bladed through starting October 15th and may be bladed through at any time if the road condition impedes traffic. Preserve your dust control by keeping it properly marked and by filling potholes with rock. Poweshiek County’s dust control policy can be found at poweshiekcounty.org.

Dust Control Request Form

The deadline for application has passed. Please check with us regarding late applications.