All wells, including existing wells and future wells, shall be tested annually, and results of those tests shall be furnished to the City Clerk. An individual well owner may have a sample of the water taken to the nearest place for testing, and a copy of that test shall be placed with the City Clerk. All annual tests shall be taken and completed during the month of September of each and every year, but shall in any event be filed with the Clerk on or before October 1 of each and every year. If any owner of a well fails to comply with this annual requirement, the City Clerk shall send notice to said owner advising that within 15 days after receipt of notice, if the well is not properly tested, the City will have the well declared abandoned, and the owner will no longer be able to use the same. Any owner of a well who receives a test that indicates that there is not potable water has a duty and an obligation to immediately advise the City to take steps to terminate the use of that well, and if the situation cannot be corrected, the well shall be abandoned forthwith.