Can You Safely Drink From Plastic Water Tanks?


The safety of plastic water tanks is one of the most debated topics in the industry. This short guide gets down to the nuts and bolts of the matter to explain exactly what makes a difference, and what you need to look for. 

View Our Range Of Water Tanks

What Are ‘Contaminated Tanks’?

‘Contaminated water tanks’ are likely contaminated because they contain algae, not because the plastic itself poses a risk. A food-grade or inert plastic tank is a suitable vessel for drinking water in most circumstances.

However, if there is algae in the water or on the surface of the tank, the water is not safe to drink. Tanks can also become contaminated with pathogens such as Legionnaire’s Disease. This pathogen, which causes a potentially deadly form of pneumonia, occurs naturally in rivers, streams, and lakes, and feels equally comfortable in water tanks.

Why Is Algae In Water Tanks A Problem? 

Algae is a term that refers to a range of bio-organisms. In technical terms, they are photosynthetic eukaryotic organisms, but to most of us they are slimy green, brown, or red sludge. Excretions from algae are toxic to both humans and animal, and can cause skin rashes, nausea, vomiting, stomach pains, fever, and headaches, organ damage, and neurological damage. Sometimes, breathing in algae spores can be instantly fatal.

Why Does Algae Like Water Tanks? 

Algae requires a few basic ingredients to thrive. It needs sunlight to photosynthesise, and it requires relatively still water to mature. Algae thrives in CO2 rich environments, making it particularly prevalent around power plants, ethanol production plants, and similar industrial sites. It also requires heat, which is why the enclosed space of a water tank is so appealing to algae. When sunlight, still water, heat, and CO2 are combined in the right combinations, algae will flourish. 

How Can I Stop Algae In My Water Tank?

Removing any component of the algae formula will prevent or limit its growth. For instance, without sunlight, algae cannot photosynthesise. As such, water tanks need to be made of robust, opaque, UV resilient materials such as heavy-duty polyethylene. This powerful barrier deprives algae of the light that it needs to thrive, reducing the risk of toxic blooms inside the tank. Tanks also need to be properly maintained using chemicals such as chlorine to destroy any algae that begins to bloom. 

Are There Any Water Treatments Available?

Chlorine is the best chemical for destroying algae. However, it is very important to combine chlorine with the correct water pH. In very alkaline water, chlorine has no effect, and in acidic water it becomes so overpowering that can be harmful to humans and animals. The ideal pH is 6.4, which is the body’s neutral balance. In the comfortable environment of 6.4 pH, chlorine can destroy the organisms that enable algae to thrive.  

So… Is Water From A Plastic Tank Safe?

As long as the tank is properly designed, manufactured, and maintained, its water will be safe. At Enduramaxx, we offer an extensive range of high-quality standard plastic tanks and bespoke water tanks. For more information, please get in touch with one of our water safety specialists today.

How Much Do You Really Know About Tank Maintenance? - LARGE

Image source: Unsplash 

Related Posts

What Is Rainwater Harvesting And What Can It Be Used For?

Rainwater harvesting is becoming something of a buzzword among businesses and homeowners alike,...

Potable or Non-Potable Water Tanks: What’s The Difference?

What’s the difference between potable and non-potable water tanks? If you’re considering purchasing...

What Is A Tank Bund? Why Tank Bunds Are Used

What is a bud? What is a tank bund? To answer your questions a tank bund is an area or secondary...