SAN FRANCISCO—Starting next spring, San Francisco’s residents will need to pay more for water, which was introduced after the city declared a water shortage emergency last week. Starting April 1, 2022, the utility commission will temporarily charge both drinkable water and wastewater treatment customers five percent more, which translates to approximately $6 per month for an average residential bill if water consumption stays the same. “With California still experiencing devastating drought and the uncertainty around this rainy season, we need to make tough decisions that will ensure that our water source continues to be reliable and dependable for the future,” Mayor London Breed said in a statement. The surcharge will end when the emergency is rescinded by the utility commission, according to the city. San Francisco Public Utilities Commission unanimously approved the emergency measure to reduce water usage last week, asking residents to voluntarily cut water usage by 10 percent, compared to usage …