A lawsuit brought by South Bay cities alleging the federal government is not doing enough to prevent and treat the flow of Tijuana sewage into the U.S. can move forward, a San Diego federal judge ordered this week. The ruling, filed Wednesday, comes a day after U.S. District Judge Jeffrey Miller toured pumps and water-capture basins in the Tijuana River Valley to get a first-hand look at the issue. The order allows the lawsuit to proceed on claims that the U.S. International Boundary and Water Commission violated the Clean Water Act by allowing wastewater from canyon water-capture basins to spill into the surrounding environment without the proper permit.