WIIL is owned and operated by Alpha Media and airs an active rock radio format.

The station has an effective radiated power (ERP) of 50,000 watts, the maximum output for the region in which it operates.

By 1978, the station had converted to a fulltime album oriented rock (AOR) format and changed its call letters to WJZQ.

In April 2010, the station received Federal Communications Commission (FCC) approval to change its city of license from Kenosha to Union Grove.

In 2013, Florida-based Digity Media acquired the NextMedia Group, including WIIL and sister station WLIP.

The 2012 WIIL Rock Fest was held on August 11 and featured performances by All That Remains, Saving Abel, 10 Years, Fear Factory, Static-X, Black Stone Cherry, and Shadows Fall and others.

The 2013 WIIL Rock Fest was held on August 24 and featured a partial lineup of Volbeat, HIM, Airbourne, Nonpoint, Trapt, Hurt, SOiL, Red Line Chemistry, and Smile Empty Soul.

The 2015 WIIL Rock Fest was held at Franksville Memorial Park in Racine County, Wisconsin.

Performing bands included Hollywood Undead, Pop Evil, Royal Bliss, We Are Harlot, Saint Asonia, Red Sun Rising, Starset, Devour the Day, Texas Hippie Coalition, Aranda, Butcher Babies, Failure Anthem and Psychostick.