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Yes, there may be cysts in your drinking water

In the Merriam-Webster Dictionary, one of the definitions of a cyst is “a resistant cover about a parasite produced by the parasite or the host.” In other words, cysts have a strong membrane outer wall that protects the cells inside. The cyst is a vehicle; the source of concern are the cells within it. In waterborne cysts (also called microbial cyst), these cells often carry harmful protozoan parasites that can make people sick.


Common cysts

The most common types of parasites found in waterborne cysts are Giardia and Cryptosporidium. These parasites can be introduced into a water supply—such as a lake, river, or stream, through the waste of an infected animal or person. The parasites are not known to cause long-term health problems. However, ingesting them will cause human intestinal issues, including abdominal cramps and diarrhea.


Parasites and the water supply

In the final decades of last century, Giardia was the “most commonly identified pathogen in waterborne outbreaks reported in the United States.” In the years since, public water officials have fought parasites through stringent treatment methods.



As an example, in 1992, the managers of the New York City water supply began a comprehensive program to monitor for the presence of Giardia and Cryptosporidium. As of 2017, the NYC Department of Environmental Protection found the parasite levels to be so low that no action was required to address them.



As an extra layer of protection against harmful parasites in drinking water, families can use the Coway Aquamega 100 water purifier at home. The system has been tested and certified by the Water Quality Association to reduce waterborne cysts by 99.99%.


Other benefits

The Coway Aquamega 100 also reduces many other contaminants including chlorine, mercury, and lead, among others. With the Coway Aquamega 100, everyone in your home can enjoy fresh, clean water, straight from the kitchen faucet, in unlimited supply and at any time.


1Coway air purifiers have been proven to trap dust, pollen, dander, viruses and bacteria in the air based on KCL (Korea Conformity Laboratories) testing.They have been tested in a 30㎥ size chamber according to the Korea Air Cleaning Association standard (SPS-KACA 002-132:2022 Modified) to measure the 0.01㎛ size of particle removal rate. It was tested on maximum airflow speed in normal room temperature and humidity conditions. The performance may vary in the actual living environment of customers.
→ Tested with Airmega Aim, 100, 150, 160, AP-1216L, AP-1512HH, AP-1512HHS, 200M, Icon, IconS, 230, 240, 250, 250 Art, 250S, 300, 300S, 400, 400S, ProX

299.97% of viruses, bacteria, fungi and pollen were verified to be removed from the air for Coway air purifiers which have Green True HEPA™ filter applied based on the Japan Food Research Laboratories(JFRL) testing according to JEM 1467 standard.
→ Tested with Coway Airmega AP-1512HH, AP-1512HHS, 250, 250 Art, 250S, 300, 300S, 400, 400S
→ All tested by JFRL and received above result within below time.

All tested by JFRL and received above result within below time.

- Virus: Tested with Escherichia coli phage ΦX174 NBRC 103405, 60 minutes
- Bacteria: Tested with Staphylococcus epidermidis NBRC 12993, 60 minutes
- Fungi/Mold: Tested with Penicillium citrinum NBRC 6352, 60 minutes
- Pollen: Tested with Cedar Pollen extract, 60 minutes

3Aerosol test conducted in a Biosafety level 3 laboratory with two Coway air purifier models, Coway Airmega 250 and 400 for removal of SARS-CoV-2 Aerosol by US based MRI Global, a not-for-profit laboratory and partner of US Department of Defense. The test was conducted in a 13.1ft3 chamber. Virus was aerosolized for 15 minutes and the product was turned on high for 2 minutes. Result showed each product effectively removed over 99.98% of the SARS-CoV-2 in 2 minutes. This is a result from a laboratory experiment condition and result may vary in different conditions. This result does not imply it kills SARS-CoV-2 or prevents the transmission of Covid-19. Coway Airmega 250S and 400S are identical to the tested models and has equal performance with an additional mobile connectivity function.

4The concentration of ammonia, acetaldehyde and acetic acid were proven to be removed within 30 minutes by FCG Research Institute, Inc. Human Life Science Lab. It is not a demonstration result in the actual use space. Not all odors and gases may be supported. → Tested with Coway Airmega 150, 160, AP-1512HH, AP-1512HHS, 400, 400S

5The coverage area of the air purifier is based on an area where the air cleaner can make two air changes per hour (ACPH). An air change per hour translates to how many times an air purifier can clean an area, assuming the height of a ceiling to be 8 ft, in one hour. Therefore ** means two air changes per hour means that the cleaner can clean the area once every 30 minutes and * means air changes per hour means that the air purifier can clean the area once every 60 minutes.

10Terms and conditions apply. Discounts, including promotions, coupons, bundle discount and subscription discount, cannot be stacked on top of other coupons. During promotional periods, discount codes will not be able to be applied to orders. Promo codes may apply to products only—filters, accessories, and new products within 3 months of the release date are not included.