Sacramentans continued to conserve water last month, although their total consumption grew compared with a year earlier.The Sacramento Regional Water Authority said Thursday that water consumption fell by 18 percent in August compared with August 2013, the baseline used by state drought regulators. The conservation rate was below the 22 percent savings achieved in August 2014. That suggests Sacramentans have become somewhat less diligent about conserving water after the state rescinded its mandatory savings program. Nonetheless, water officials pronounced themselves pleased with the results.