Good organic solutions a

Ant bait that sterilizes the queen and therefore kills the colony
without harming anything else.

Or orange oil. You can buy organge oil concentrate here(Austin Texas
area) and use a spray or drench. It does the job but may make your
plants around the ant mounds look puny for awhile. After the ants die
flush the soil around the plants with water.

Hope this helps.

Ron T