Do Water Purification Tablets Expire?

Yes, water purification tablets expire. The most common forms of water purification tablets are Chlorine and Iodine. Chlorine and iodine tablets typically expire after 3-5 years if not used. However, once opened, they can expire after as quickly as less than a year if they are not properly stored. 

Always follow the directions and guidelines on the containers of the water purification tablets. bottles. The containers will list an expiry date. Do NOT rely on the tablets if they have reached their expiry date. 

Once you open the purification tablet bottle, it is advisable you use it within a year.

What Causes The Tablets To Expire?

Sunlight, temperature, or moisture increases the degradation process of water purification tablets.

How do I Avoid Quick Expiration of Water Purification Tablets?

Follow the storage instructions provided with the tablets.

Always keep your water purification tablets in a dry, cool environment away from excess heat, moisture, humidity, or air.

Most water purification tablets are individually packed and sealed. If your tablets come in a bottle, always reseal the cap tightly. Once opened, do not use bottled water tablets for more than a year.

How do Water purification tablets work?

Water purification tablets (note they also come in liquid or powder form) are added directly to untreated water, releasing chlorine or iodine. Chlorine or iodine acts as a disinfectant by destroying harmful organisms.

How effective the tablets are at destroying harmful pathogens depends on multiple factors like the temperature, pH, cloudiness of the water, and how long the chemical is left to dissolve and fully take effect. Please note that these tablets will not completely eliminate all pathogens. According to the Centers for Disease Control and Prevention (CDC), proper boiling of untreated water is the most effective technique, but this is often not practical. Furthermore, water-purifying chemicals do not rid the water of chemical contaminants like pesticides