The deal was established in 1972 and hasn't been updated since. I'm sure it made sense then when the county population was 240K less and far fewer communities were then serviced by the water/sewer system. It's time to revamp the deal though... which seems like it may be starting soon: https://www.baltimorecountymd.gov/county-news/2023/01/31/baltimore-county-and-baltimore-city-leaders-announce-landmark-legislation-to-create-regional-water-governance-task-force