Although aesthetically displeasing, tannins do not pose a health issue. However, if tannins are found in the water, it can indicate that your water is significantly influenced by surface water. Put simply, this means that if tannins can travel easily from surface water to your groundwater source, pathogens can easily travel through as well.
JPG is a file extension for a lossy graphics file. The JPEG file extension is used interchangeably with JPG. JPEG stands for Joint Photographic Experts Group who created the standard. JPG files have 2 sub-formats, JPG/Exif (often used in digital cameras and photographic equipment), and JPG/JFIF (often used on the World Wide Web).
1 A JPG file is a compressed image file that does not support a transparent background. 2  The level of compression in JPG files can vary in resolution with high quality for desktop printing, medium quality for web viewing and low quality for email. 3  When compressed repeatedly the overall quality of a JPG image is reduced.