Yes, tank water can be acidic, especially in plastic tanks.
Rainwater, which is often collected in tanks, is naturally slightly acidic because it absorbs carbon dioxide from the atmosphere, forming carbonic acid. The reference states, "rainwater pH levels are normally below 7".
Why Tank Water Acidity Matters
The acidity of tank water can have several implications:
- Corrosion: Acidic water can corrode metal plumbing and fittings. According to the provided information, "In plastic tanks the pH will remain acidic potentially corroding copper plumbing and brass fittings."
Factors Influencing Tank Water Acidity
Several factors can influence the acidity of water stored in tanks:
- Tank Material: Plastic tanks may not buffer the water's pH, allowing it to remain acidic.
- Environmental Factors: The amount of carbon dioxide in the atmosphere and local pollution levels can affect rainwater acidity.
