Two Denver marijuana cultivation facilities voluntarily recalled a wide-ranging group of products Wednesday over concerns they contained residues of disallowed pesticides.

TruCannabis and Colorado Care Facility, a subsidiary, issued the recall after its products tested positive for three pesticides the state says cannot be used to grow marijuana.

All the products were produced from marijuana harvested before June 2, 2015, by TruCannabis and Colorado Care. The scope of the recall was not provided, but involves dozens of product names.

It was not immediately clear how the pesticides were detected.

The Colorado Department of Agriculture in April issued a list of pesticides it says are allowed for use on marijuana, but does not recommend their use because they say there is no information about their safety to consumers.

The recall is the third by the Denver Department of Environmental Health— the only agency to issue a marijuana-related recall of any kind – since it quarantined 100,000 plants in March and April, and reaches to more than a dozen retail locations.

Owners of TruCannabis could not be immediately reached for a comment.

The products include flower, trim, shake, as well as an assortment of concentrates such as wax, shatter, budder and hash oils, according to an announcement by DEH. Many of the recalled products carry labels from different businesses that made marijuana-infused products from pot grown by TruCannabis.

Those MIP businesses then sent the product back to be sold at one of TruCannabis’ five locations, four of them in Denver and one in Aurora.

Recalled concentrate product labels will show a cultivation facility number of 403R-00053, 403R-00057 or 403-00612.

Recalled dried marijuana will show either of those three cultivation facility numbers or 403-00149.

A list of impacted MIP products include Venom, CCC, Lab 710, Mahatma, White Mousse, Top Shelf, Zuni Wellness (The Lab), The Growing Kitchen, THChocolate, Stay Con, TC Labs, The Lab, Better Concentrates, CWD and TR Scientific.