But for years, state employees inspecting Jackson’s primary water system noted few problems with the distribution system — the pipes that delivered water to its customers. In the 16 years before the system collapsed in 2022, leaving roughly 160,000 residents in and around Jackson dependent on bottled water for weeks, inspectors admonished the city just a couple times about the pipes underground. They identified issues with low water pressure just once and noted high water loss a few times. But they issued no formal reprimands or fines.

From 2006 through 2021, Jackson’s inspection score from the Mississippi State Department of Health, which oversees water systems in the state, averaged nearly 4 out of 5. The few times MSDH identified major problems in Jackson, all but one were tied to its water plants, not the distribution system.

This week, the Environmental Protection Agency’s Office of Inspector General said the state’s failure to flag ongoing problems in Jackson’s water system, including those in the pipes, contributed to the Jackson water crisis in August 2022. Over several years, the state’s inspections “did not reflect the conditions of Jackson’s system,” the inspector general’s staff wrote. As a result, they wrote, problems “were left unresolved until the eventual catastrophic failure of the system,” when the city’s main water plant finally buckled. It took weeks until the city could reliably pump clean water to residents.