How Long Does Giardia Live in the Yard?

For giardia: If the weather is below 77 degrees, then the yard will have giardia cysts present for at least a month. If the weather is consistently hotter than 77 degrees, then the giardia cysts will have all died off after one week.

How long does Giardia live in soil?

In the soil

In cold temperatures (around 4ºC/39.2ºF), Giardia can survive for approximately 7 weeks (49 days). At room temperature (around 25ºC/77ºF), Giardia can survive for approximately 1 week (7 days).

How do I treat my yard for Giardia?

The most readily available disinfectant is bleach diluted 1:32 in water. Studies have shown this dilution to require less than one minute of contact time to effectively kill giardia cysts. As for areas with lawn or plants, decontamination may not be possible without the risk of killing the foliage.