Giardia lamblia in Drinking Water: Health Risks, Sources, and How to Remove It
Giardia lamblia is a microbial contaminant with an EPA Maximum Contaminant Level (MCL) of 0 organisms per liter. Because it is a pathogen with a high severity weight, the presence of any organisms in drinking water is a serious concern. Regulatory standards require public water systems to prevent its detection entirely.
Health Effects
Ingesting water contaminated with Giardia lamblia can lead to giardiasis. This condition causes symptoms such as diarrhea, cramps, and nausea. These health effects make it a microbial concern for drinking water safety.
How Giardia lamblia Gets Into Tap Water
This contaminant enters drinking water supplies primarily through contaminated surface water. It is commonly introduced to these environments by animal waste. Protecting surface waters from animal waste is critical to preventing contamination.
How to Remove Giardia lamblia From Your Water
Water treatment systems use filtration to remove Giardia lamblia from the water supply. Additionally, disinfection is applied to treat this microbial contaminant. Proper filtration and disinfection are the standard treatment methods used.
Should You Test Your Water?
To check for Giardia lamblia in your area, review your local water utility's consumer confidence report or search the WaterQ database. If you use a private well near surface water or animal waste, regular testing is highly recommended. You can also look up your local water system on WaterQ or check the Giardia lamblia data page for reported levels in your area.
Frequently Asked Questions
Is Giardia lamblia dangerous in drinking water?
Yes, Giardia lamblia in drinking water can cause giardiasis. This infection results in symptoms such as diarrhea, cramps, and nausea. Because of these potential health effects, the EPA MCL is set to 0 organisms per liter.
How does Giardia lamblia get into tap water?
Giardia lamblia gets into tap water sources through contaminated surface water. It is introduced to these water sources through animal waste.
How can I remove Giardia lamblia from my water?
You can remove Giardia lamblia from your drinking water using filtration. Disinfection is another key treatment method used to address this contaminant.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.