The community is being cautioned to double check where they get their water, as it may be unsafe for human consumption.

An investigation is underway after the Guam Environmental Protection Agency found out that multiple facilities across the island accepted deliveries from unnamed companies who used water that was apparently taken from the tanker trucks.

According to the Joint Information Center, non-potable tanker trucks are not approved for delivery of water for human consumption, and boiling such water still won’t make it safe to drink.

Officials caution that non-potable water may contain bacteria or chemical contaminants at levels which are unsafe if consumed.

Guam EPA is working with the owners of all non-potable water delivery trucks who may have delivered water through unapproved methods, and warning that supplying water for people to drink through unapproved methods is a violation of the Guam Safe Drinking Water Act and violators could face a fine of up to $32,500 per violation, per day.

Additionally, investigators urge facilities that have received water in this manner to avoid drinking it, using it for cooking, brushing your teeth, or using it in any way that may risk ingestion.

Officials said the water delivered by truck may be used for non-potable purposes such as flushing toilets, laundry, and other household cleaning.

Guam EPA is requiring owners of affected facilities to self identify by providing notification to all residents and patrons that water at their facilities was derived from an unapproved source and should not be consumed. Those facilities are also asked to email Guam EPA the dates of each water delivery, the company who delivered the water, and the amount of water delivered for each date.

Emails can be sent to [email protected] or [email protected].