what could be a possible source of sulfates found in a supply of drinking water?

Some rocks and even some soils contain sulfites; as the water runs over (and through) these, it picks up some of the sulfates.

OOPS - I meant of course "SULFATES" (not sulfites.)

Certain industrial wastes can also supply sulfates to our water, as does rain.

thanks!

A possible source of sulfates in drinking water can be natural geological formations. Sulfates are commonly found in rocks and minerals, such as gypsum or limestone, which can dissolve into the water during the natural water filtration process. Sulfur-containing minerals in the soil can also contribute to the presence of sulfates in groundwater. Additionally, human activities such as mining, industrial processes, and agricultural practices can introduce sulfates into water sources through runoff or direct contamination. To determine the specific source of sulfates in a supply of drinking water, it is recommended to conduct detailed water quality testing and analysis. This can be done by contacting a reputable laboratory or your local water authority, as they have the expertise and equipment to identify the source of sulfates and other substances in the water.