What's in Your Office Water Jug? 5 Things to Know

How Much Does a 5-Gallon Water Jug Weigh?

A 5-gallon water jug holds about 42 pounds of water. The U.S. Geological Survey lists water's weight as 8.33 pounds per gallon, and five gallons at that rate comes to roughly 41.7 pounds before the weight of the jug itself. Anyone who swaps the jug lifts all of it onto a top-loading cooler, and whoever receives a delivery moves the full jugs to wherever the office stores them.

Weight is the first of five things a delivered jug brings along. The others are the plastic particles found in bottled water, storage rules, a reuse cycle, and a "purified" label that does not have to name its source. Each one also feeds into the larger decision covered in how to choose a bottleless water system for your business.

Three numbers from the sources below put the five points in scale. Each comes from a government agency.

Tiny Plastic Particles in Bottled Water

A 2024 study in the Proceedings of the National Academy of Sciences (PNAS) counted plastic particles in single-use bottled water with a microscopy technique. The National Institutes of Health (NIH) summary says the researchers tested three popular brands and found an average of about 240,000 plastic pieces per liter, and about 90 percent of them were nanoplastics, the smallest fragments of plastic.

NIH says the health effects of these particles are still unproven and unknown. The study looked at single-use bottles, and the NIH summary does not mention five-gallon jugs, so the numbers do not tell you what a delivery jug contains. They show that the bottled water tested was not free of plastic particles. Tap water has gaps of its own, and microplastics in tap water covers what is and is not known there.

Storage Rules for Delivered Jugs

Heat and sunlight can change what ends up in water stored in plastic. A June 2026 TIME article, "Is It Safe to Leave Bottled Water in the Sun?", reports that chemicals can move from plastic into the water more readily as temperatures rise. Researchers it cites say some substances begin to migrate around 68°F and others become more mobile between 86°F and 104°F, and the article notes that even a cupboard can get warm enough to matter.

The article names antimony, a metal used in making plastic, and bisphenol A (BPA), a plastic-making chemical, as examples, and says the combined health effects are not well understood. Its storage advice comes from the International Bottled Water Association, which tells consumers to store bottled water at room temperature or cooler, out of direct sunlight. For an office, that raises a practical question about where the spare jugs sit and how warm that spot gets in July.

What Happens to a Jug After It Leaves Your Office

Delivery services that run jug exchanges reuse the jugs. Water.com, the site of delivery company Primo Brands, says returned exchange bottles are professionally sanitized and refilled multiple times, then recycled at the end of their life under program guidelines. The page does not give a number of reuses, and it is a company describing its own service, so treat it as that company's account.

Reuse keeps a jug out of the waste stream for longer. Each trip still takes a delivery truck to your door, and the plastic and delivery side of the picture is covered in the carbon footprint of bottled water delivery and how to reduce plastic waste in the office.

A "Purified" Label Can Mean City Tap Water

The U.S. Food and Drug Administration (FDA) rule for bottled water, 21 CFR 165.110, requires bottled water drawn from a community water system to say so on the label, with the words "from a community water system" or "from a municipal source." The rule makes an exception for water that has been treated to meet the definition of purified water and is labeled as such. A jug labeled purified therefore does not have to tell you whether its source was a city tap.

Purification describes a treatment step, and the label does not have to say where the water started. Spring water, purified water, and distilled water covers how the bottled water labels differ.

What Changes With a Bottleless System

A bottleless system connects to the building's water line with a simple T connection, so the water in the cup has already been purified on site. There are no deliveries to schedule, no jugs to store, and no 40-pound lifts.

Bottleless Nation's S1 and S3 use four stages of purification (sediment, pre-carbon, a reverse osmosis membrane, and post-carbon), and the M6 adds a fifth, a mineral boost filter. Reverse osmosis pushes water through a membrane so fine that most contaminants can't get through, and how reverse osmosis works walks through the process. Each unit also has SMART monitoring, which reports how the unit is running back to Bottleless Nation, and an in-tank UV LED that keeps stored water sanitized. The source water is still the building's tap water. The difference is that purification happens on site and Bottleless Nation's team handles the annual preventative maintenance and the annual filter change.

Installation and service calls come at no extra charge. To see what is in the tap water at your address first, the free tap water lookup takes a zip code. For the cost side, bottleless water cooler vs. bottled water delivery works through the comparison, and bottleless water cooler myths answers common objections. To plan purified water for your office, talk to our team.

Frequently Asked Questions

How much does a 5-gallon water jug weigh?

The water alone weighs about 42 pounds. The U.S. Geological Survey lists water at 8.33 pounds per gallon, and five gallons at that rate is roughly 41.7 pounds. The jug adds more, and the amount varies by jug.

Is it safe to leave a water jug in the sun?

The International Bottled Water Association advises storing bottled water at room temperature or cooler, out of direct sunlight. A June 2026 TIME article reports that heat can speed the movement of chemicals from plastic into water and says the combined health effects are not well understood.

Are 5-gallon water jugs reused?

One major delivery company says its exchange bottles are sanitized and refilled multiple times before they are recycled. It does not give a number of reuses.

Can purified bottled water come from tap water?

Yes. The FDA requires bottled water from a community water system to be labeled that way, but the rule exempts water treated to meet the purified water definition and labeled as such. A purified label does not have to state the source.

How does a bottleless water cooler get its water?

Each unit connects to the building's water line and purifies the water on site, so there are no bottles to order, deliver, or store.

Is installation included?

Yes. Bottleless Nation installs every unit at no extra charge, and service calls come at no extra charge too.

Who handles maintenance on the units?

Bottleless Nation's service team does. The team handles annual preventative maintenance and the annual filter change, so nobody in your office has to schedule or track it.

What happens to the used filters?

Used filters are often thrown away. Bottleless Nation sends its used filters to Reworld, which destroys them at about 1,100°C. According to Reworld, an EPA-validated study at its Lake County, Florida facility found 99% destruction of the PFAS surrogate compound it tracked.