Even in clear water, there can be problems lurking.

Without proper maintenance, pool and spa water can be contaminated with bacteria and parasitic pathogens. These are commonly known as recreational water illnesses (RWIs) and are becoming more of a concern. RWIs are caused by pool water contaminated with bacteria or parasitic pathogens that are released by swimmers.


In many cases chlorine or bromine is effective at killing most pathogenic bacteria. However, some germs are very resistant to standard sanitizers. One highly chlorine-resistant parasite that can be present in pool water is Cryptosporidium, commonly referred to as Crypto. Crypto is introduced to swimming pool water from swimmers who release fecal material into the water.


In its oocyst stage, Crypto is protected by a thick outer shell, so it can remain viable in property chlorinated water to six to seven days. When swallowed by swimmers, Crypto can cause severe symptoms such as diarrhea, stomach cramps, fever, nausea and vomiting.


Crypto cysts are approximately 4-6 inches microns in size and can pass through most sand filters. Even in D. E. filters, which pick up material down to 4 microns, Crypto can elongate and pass through the media.

US1 Pools offers a wide range of cost-effective water care products to treat just about any dirty water issue. Our focus is on taking the bad stuff out of your pool, so your family can swim happy.