The Oldsmar City Council unanimously approved small increases in its water and sewer rates Tuesday night. The basic rates for water and sewer will not change. Water is still $7.90 a month for the first 2,000 gallons, and sewer is still $13.50 for the first 2,000 gallons. However, people who use more water will pay $2.10 per thousand gallons, an increase of a dime. The city will charge $2.47 per thousand gallons for sewer, an increase of 12 cents.