Why do I feel ill after drinking tap water?

Author: Robbie Huels  |  Last update: Thursday, May 22, 2025

Public tap water in the United States is regulated and usually safe to drink. However, sometimes tap water gets contaminated with germs that can make you sick. Contact your drinking water utility or health department if you think your tap water is contaminated with germs.

Why do I feel sick after drinking tap water?

While the CDC confirms that the US has one of the safest public water systems in the world, it's still possible to get sick from tap water. The presence of e. Coli or salmonella bacteria in the water you ingest can give you flu-like symptoms that include stomach cramps, diarrhea, or vomiting.

Can you be intolerant to tap water?

Various pollutants in tap water can trigger or amplify allergic reactions. Consuming or merely contacting these pollutants can lead to symptoms ranging from minor skin irritations to serious respiratory problems.

How long does tap water sickness last?

But it's not necessary to seek medical help if you're otherwise healthy, aren't running a high fever and are able to take in fluids, he says. Most illnesses related to water-borne pathogens go away on their own within 24 to 48 hours.

Is my tap water making me ill?

If you believe that your drinking water is causing illness, you should consult a doctor and contact your water company in the first instance. Your water company may come to your property and take some water quality samples. To find your local water supplier, visit the Water UK website.

How Bad Is Tap Water for Health? | Dr. Andrew Huberman

Should I go to the doctor if I drank contaminated water?

Symptoms of Illness Caused by Water Contamination

If you suspect that you have been exposed to contaminated water and are experiencing any of the following symptoms, you should seek immediate medical attention: Nausea. Diarrhea. Gastrointestinal issues.

Why does tap water upset my stomach?

Stomach ache can be caused by drinking tap and well water that is not properly sanitized. The unprocessed water may contain viruses, bacteria, or other contaminants which cause viral gastroenteritis, which is inflammation of the stomach, small and large intestines.

Is tap water 100% safe?

However, while it's generally safe for drinking, tap water is not sterile, and there are a few situations in which using water straight from the faucet could endanger your health, according to experts and a CDC report published in the journal Emerging Infectious Diseases.

Can tap water affect your gut?

Drinking chlorinated tap water may alter gut bacterial composition. A recent study by Drs. Georg Wondrak and Frank Duca explored the effects of drinking chlorinated water on mouse gut microbiota. Their findings revealed a decline in fecal microbiota diversity and notable shifts in fecal bacterial composition.

Why am I sensitive to tap water?

Specific contaminants that commonly find their way into tap water can be potential contaminant triggers for allergic responses. These contaminants can lead to skin irritations, respiratory problems, and other allergic reactions when consumed or even when they come into contact with the skin.

What is the rarest allergy in the world?

1. Water. Aquagenic urticaria is a rare condition that causes itchy and painful hives to break out whenever the sufferer comes into contact with water. These hives occur as a result of the body's mast cells releasing histamine, which creates the hives.

Can your stomach be sensitive to water?

Key Takeaways. Stomach pain after drinking water is relatively common and can occur for a variety of reasons, including habits like drinking water too fast, drinking water that's too cold, or chugging too much at once.

Why do I feel weird after drinking water?

As a result, water moves into your body's cells and causes them to swell. When you get too much water in your brain cells, it increases pressure on your brain and affects how it works. This leads to changes in your awareness, movement and behavior (altered mental status).

Can drinking hard tap water make you sick?

The good news is that hard water generally isn't a health concern. It may not be the best option to clean with, but you can usually drink it without worrying about safety. However, it can impact your well-being in other ways through negative effects on your hair, skin and nails.

Why does tap water give me a headache?

Add to that the risk of heavy metals, pesticides and other industrial pollutants that commonly enter municipal water supplies (at least in traces), and the combination might be a major factor in the frequency and severity of your migraine attacks.

What are the long term side effects of drinking tap water?

If drinking water contains unsafe levels of contaminants, it can cause health effects, such as gastrointestinal illnesses, nervous system or reproductive effects, and chronic diseases such as cancer.

Does boiling tap water purify it?

While boiling water eliminates bacteria in the water, it does not make the tap water pure. Water can contain other contaminants such as microplastics, pesticides, fertilisers, industrial chemicals, hormones, medications, heavy metals and neurotoxic microorganisms which are not removed through boiling water.

Should I stop drinking bottled water?

Studies have found contaminants, including microplastics, in up to 78 percent of bottled-water samples. Microplastic contamination has been associated with a range of health issues, including oxidative stress, immune system disruption, and changes in blood fat levels.

Why do I feel sick everytime I drink tap water?

Fertilizers, pesticides, herbicides, solvents, and industrial chemicals can end up in drinking water sources. If ingested in excessive amounts, they can cause nausea and other health problems. It is a wise choice to invest in a reverse osmosis system to ensure the water that you drink is clean and safe.

What are the symptoms of getting sick from tap water?

What are the symptoms of water-borne illness? Symptoms may include diarrhea, cramps, nausea and possible jaundice and associated headaches and fatigue. Symptoms may appear as early as a few hours to several days after infection and may last more than two weeks.

How to fix overhydration immediately?

How to Fix Overhydration Immediately
  1. Stop drinking water and other fluids.
  2. Rest and avoid physical activity.
  3. Eat salty foods or drink sports drinks to replenish electrolytes.
  4. Seek a medical consultation if symptoms persist or worsen.

What should I do if I drank tap water?

What if I accidentally drank tap water before I learned about the Precautionary Boil Water Notice? If this happens, don't panic. The chances of becoming ill are slim. See your doctor if you experience diarrhea, nausea, vomiting or abdominal cramps.

How long after drinking bad water do you get sick?

Symptoms of Waterborne Illness

The incubation period (the time between exposure to the pathogen and onset of symptoms) may begin within hours after being exposed or may begin days later.

What is the simplest method to purify water?

Boiling is a traditional method of water purification that is still commonly used by a lot of people. This is a simple yet effective process that involves heating water at a high temperature (100°C) for some time. It kills most of the pathogenic organisms, including viruses and bacteria, present in water.

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