Jersey City residents attempting to manage skyrocketing rents, higher grocery and gas prices and an increase in municipal taxes have a new expense to deal with: a 7% increase in water and sewerage fees. The city’s autonomous Municipal Utilities Authority (MUA) voted Thursday to approve the new fee that increases the average water bill from $33.25 to $35.58 and the average sewerage bill from $45.85 to $49.06 — a total yearly increase of $66.50. Officials at the MUA did not respond to a request for comment on the rate hike, but in an interview on Jersey City City Council President Joyce Watterma…