The Oakland County Water Resources Commissioner’s Office is continuing repair and replace parts of Pontiac’s aging water and sewer systems.

Over 50 percent of the water system in the city is over 80-years old, with an estimated cost of $90 million projected for waterline replacement over the next 20 years. More than 40 percent of the city’s sewer system is also over 80-years old, requiring $115 million in sewer line replacement over the next 20 years.

Aging infrastructure isn’t unique to Pontiac, with Michigan’s sewer systems needing a total of $26 billion in investment by 2030 according to the commissioner’s office. It’s a lengthy process, even without waiting for financing to make the repairs.

Navid Mehram, chief engineer for the commissioner’s office, said that it could take up to 100-years to completely replace all the lines which are past their expected life in Pontiac.

For the 2018 fiscal year, typical monthly water rates in Pontiac are expected to increase by 1.3 percent while sewer rates are expected to increase by 6.2 percent.