![]() ![]() As sterile as the conditions might be, there were other plates that were not usable and discarded because bacteria started to grow on them. ![]() It’s important to note that this bacteria growth is possible with the sensitive agar plates. There was a small mold-like bacteria present in the plate for the spout with no cap, but not in a location where the swab was rubbed (where the visible streak marks were). As expected, no bacteria is present where the cotton swab was rubbed. The original control samples were not originally incubated in the sous-vide bath, rather, they were left in a room-temperature environment for the six days while the water jugs were stored. The large pot was set in the kitchen with cling film over it to prevent the water from escaping as vapor, and then placed in the bathroom for four days. Once all the samples were collected and labeled, they were each stored in zip lock bags and placed in the makeshift incubator, which consisted of a thermally regulated bath using a sous-vide machine set to 90 degrees fahrenheit for four days as recommended in the science kit instructions. These samples included: the sink drain to establish a positive control, the TV remote, and a washed blue berry that was stored in the refrigerator. Additional samples were taken to observe bacteria that would commonly be present around the house. As the pictures show, they alternated locations between a countertop and a storage area each for three days, and used under normal conditions.Īfter the six days were complete, the samples were taken using the science kit materials. ![]() Here are the storage locations for the water jugs. The water jugs were transported in two locations for added variability, first empty on the bed of a pickup truck, and then inside the truck once filled with water.Īn additional source for contamination includes the moist conditions of the water filling area. Samples were taken of the newly cleaned water jug spouts to establish two experimental controls. The Evviva science kit contained sterile cotton swabs and distilled water for collecting samples. The five gallon water jugs and Spigcap™ were first washed with soap and water for 30 seconds and dried with paper towels. The specimens that come from exposed spouts will have more bacterial cultures. Spouts on five gallon water jugs become ridden with bacteria during transport or while at home if left open to the elements. Before using Spigcap™ one big worry was that the spouts were close to the floor of the car during transport.ĭo spouts on water jugs get dirty during transport, or at home? And if we use a Spigcap™, does it create a meaningful difference in cleanliness? This experiment will attempt to answer these questions qualitatively using bacteria culture plates. Pet owners worry that their pets may try to sip from the dispenser. At home, there is a worry that fruit flies or other pests will come in contact with the spout. Sometimes when filling up water containers, plastic bags are seen placed over the spigots. These retail outlets offer purified drinking water typically filled in five gallon jugs with spout dispensers. This feature is critical if your unit can dispense hot water, which can cause scalding.People who either do not trust municipal water sources or simply do not like the taste or smell of their tap water often rely on water stores. Child Locks: This feature will help prevent accidental dispensing of water by children while still making it simple and easy to dispense by adults.Pet Station: Some top-loading systems have a dog or cat water bowl that you can pull out at the bottom of the dispenser that is refillable with the press of a button.Some systems offer an ozone self-cleaning feature with the press of a button Self-cleaning mode: Water coolers and dispensers need cleaning to keep bacteria at bay.To give yourself more flexibility in the future, consider a model with this option. Conversion Kits: Some bottle dispensing units have the option of being converted to a point-of-use (bottle-less) system.Cup Holders: Although the trend is moving away from using disposable cups, with the sustainable preference being reusable water bottles, you can still find models that offer holders for drinking cup storage.Purification System: Some systems come with a filtration kit or reverse osmosis filtration system to remove small particles, sediment, lead, and chlorine from the tap water line.Drip Tray: Is the drip tray removable? Models that come with a removable drip tray are easier to clean.Tap design: If you want to refill personal water bottles, tall glasses, or travel mugs, there should be adequate spacing between the drip tray and faucet, and the nozzle should be small enough to insert into your personal-use bottle for refilling.The Spruce Home Improvement Review Board. ![]()
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