The Environmental Integrity Project’s report said sewage overflows from Harrisburg pipes into the Susquehanna totaled 1.4 billion gallons last year, up from 789 million gallons in 2016. While much of that increase is tied to record rainfall that repeatedly overwhelmed wastewater and stormwater systems, the report also noted that the number of sewage overflows during dry weather increased from seven in 2017 to 28 in 2018.